Oxygen barrier property test of plastic bottles for dairy drinks
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In this article, we take plastic bottle as an example to explain how to test the oxygen barrier property of the packaging for dairy drinks.
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111.docx
The document is a project report on detecting the presence of basic radicals in different chocolate samples found in the market. The student conducted experiments on Dairy Milk, KitKat, Milky Bar, OneBar, and Snickers chocolate bars using cobalt nitrate solution. Grey ash was observed in all samples, indicating the presence of calcium. The conclusion is that while chocolate provides some health benefits, it also contains sugars and fats, so moderation is important. References are provided from Wikipedia and research websites.
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Cell Membranes and TransportHands-on labs, inc. Version 42-00.docx
Cell Membranes and Transport
Hands-on labs, inc. Version 42-0033-00-01
LAB REPORT
PHOTOS – Include the digital photos as attachments or place them right into your report.
Photo #1 - Take a photo of the results from the osmosis experiment, by placing the 3 bags (after drying the outside) on a piece of white paper as background. Write HOT, COLD, AMBIENT underneath each bag. Get close enough to see the different colors. This photo is after 30 min. (not 60)
Photo #2 – Take a photo of the row of test tubes with the potato strips in them along with the solutions.
Photo #3 - After 24 hours have elapsed for the potato/sucrose experiment, hold tubes A and B up side by side and take a photo close enough that you can see the difference in the potato7 strips inside.
Exercise 1: Diffusion
Observations
Data Table 1: Rate of diffusion in different temperatures
ºC
Minutes
Temperature
Initial
Temp.
Initial
Color
5
10
15
20
25
30
60
Cold
Ambient
Hot
Experiment
Cell MeMbranes and TransporT
187
©Hands-On Labs, Inc.
www.LabPaq.com
Questions
A. Write a one-paragraph analysis of the results for the procedure. Provide reasons for the
differences in the rates of diffusion at the different temperatures.
B. Did the sizes of the molecules affect their movement?
C. What molecules remained inside the bags? How can you make this determination? What molecules were able to freely move into the bags?
Exercise 2: osmosis
Observations
DataTable 2: Potato Mass
Contents in Test
Tube
Initial Mass of Two Potato Strips
Final Mass of Two Strips
Mass
Difference
% Change in
Mass
Class Average Percent Change in Mass (if available)
a) Distilled Water
b) 1.0 M Sucrose
c) 0.8 M Sucrose
d) 0.6 M Sucrose
e) 0.4 M Sucrose
f) 0.2 M Sucrose
Questions
A. Describe how the potato cylinders changed in their turgidity. Identify which of the solutions were isotonic, hypertonic, and hypotonic in relation to the potato.
B. What would happen to a red blood cell placed in distilled water? Why?
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-
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LAB REPORT
PHOTOS
–
Include
the
digital photos
as attachments or place them right into your report.
Photo #1
-
Take a photo
of the results from the osmosis experiment, by placing the 3 bags (after
drying the outside) on a piece of white paper as background. Write HOT, COLD, AMBIENT
underneath each bag. Get close enough to see the different colors. Th
is photo is after 30 min.
(not 60)
Photo #2
–
Take a photo ...
Identification of GasesHands-On Labs, Inc. Version 42-01.docx
Identification of Gases
Hands-On Labs, Inc.
Version 42-0189-00-02
Review the safety materials and wear goggles when
working with chemicals. Read the entire exercise
before you begin. Take time to organize the materials
you will need and set aside a safe work space in
which to complete the exercise.
Experiment Summary:
You will learn the properties of gases. You will
investigate a series of chemical reactions that
generate different gases with unique properties.
You will generate a series of gases and explore the
properties of gases through flame tests and chemical
reactions. You will also use your results to identify an
“unknown” gas.
EXPERIMENT
© Hands-On Labs, Inc. www.HOLscience.com 1
Learning Objectives
Upon completion of this laboratory, you will be able to:
● Define solids, liquids, and gases.
● Identify the unique properties of gases.
● Explain how gases are identified.
● Describe a gas generation tube and how it is used to isolate gases.
● Perform flame and chemical tests on isolated gases from controlled experiments.
● Categorize gases produced in experimental reactions.
● Analyze experimental results to identify unknown gases.
Time Allocation: 3 hours
www.HOLscience.com 2 ©Hands-On Labs, Inc.
Experiment Identification of Gases
Materials
Student Supplied Materials
Quantity Item Description
1 Aluminum pie pan
1 Baking soda, 1 tablespoon
1 Box of matches
1 Coffee cup
1 Dish soap
1 Hydrogen peroxide, 3% 20 mL
1 Metal spoon
1 Pair of scissors, 4 in
1 Roll of paper towels
1 Sheet of white paper
1 Source of tap water
4 Toothpicks
1 White vinegar, 20 mL
HOL Supplied Materials
Quantity Item Description
1 Drinking straw
1 Gas assembly, copper and plastic tubing in rubber stopper
1 Gas assembly, plastic tube in rubber stopper
2 Pairs of gloves
1 Pair of safety goggles
1 Permanent marker
4 Test tubes, 13 x 100 mm
1 Test tube cleaning brush
3 Short, thin-stem pipets
1 Well plate - 24
1 Experiment Bag: Identification of Gases (or Properties of Gases)
2 - Antacid tablets in bag 2”x 3”
1 - Bromothymol blue- 4 mL in Pipet
1 - Calcium hydroxide, 6 mL in dropper bottle
1 - Hydrochloric acid, 2.0 M, 20 mL in dropper bottle
3 - Pipet bulb, wide-neck with 1/4” stem
1 - Manganese, 4-6 pieces in bag 2” x 3”
1 - Mossy zinc, 4-6 pieces in bag 2” x 3”
www.HOLscience.com 3 ©Hands-On Labs, Inc.
Experiment Identification of Gases
Note: To fully and accurately complete all lab exercises, you will need access to:
1. A computer to upload digital camera images.
2. Basic photo editing software, such as Microsoft Word® or PowerPoint®, to add labels, leader
lines, or text to digital photos.
3. Subject-specific textbook or appropriate reference resources from lecture content or other
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Similar to Oxygen barrier property test of plastic bottles for dairy drinks
111.docx
The document is a project report on detecting the presence of basic radicals in different chocolate samples found in the market. The student conducted experiments on Dairy Milk, KitKat, Milky Bar, OneBar, and Snickers chocolate bars using cobalt nitrate solution. Grey ash was observed in all samples, indicating the presence of calcium. The conclusion is that while chocolate provides some health benefits, it also contains sugars and fats, so moderation is important. References are provided from Wikipedia and research websites.
Pharmaceutical Packaging
Pharmaceutical packaging serves several important functions:
1) It protects drugs from external environmental factors like light, moisture, and contamination.
2) Packaging identifies drug products, provides instructions for proper use, and ensures safety and efficacy.
3) Packaging types include bottles, blister packs, vials, and other containers/closures that are evaluated through testing to ensure sterility, integrity, and that they do not interact with drug contents.
Cell Membranes and TransportHands-on labs, inc. Version 42-00.docx
Cell Membranes and Transport
Hands-on labs, inc. Version 42-0033-00-01
LAB REPORT
PHOTOS – Include the digital photos as attachments or place them right into your report.
Photo #1 - Take a photo of the results from the osmosis experiment, by placing the 3 bags (after drying the outside) on a piece of white paper as background. Write HOT, COLD, AMBIENT underneath each bag. Get close enough to see the different colors. This photo is after 30 min. (not 60)
Photo #2 – Take a photo of the row of test tubes with the potato strips in them along with the solutions.
Photo #3 - After 24 hours have elapsed for the potato/sucrose experiment, hold tubes A and B up side by side and take a photo close enough that you can see the difference in the potato7 strips inside.
Exercise 1: Diffusion
Observations
Data Table 1: Rate of diffusion in different temperatures
ºC
Minutes
Temperature
Initial
Temp.
Initial
Color
5
10
15
20
25
30
60
Cold
Ambient
Hot
Experiment
Cell MeMbranes and TransporT
187
©Hands-On Labs, Inc.
www.LabPaq.com
Questions
A. Write a one-paragraph analysis of the results for the procedure. Provide reasons for the
differences in the rates of diffusion at the different temperatures.
B. Did the sizes of the molecules affect their movement?
C. What molecules remained inside the bags? How can you make this determination? What molecules were able to freely move into the bags?
Exercise 2: osmosis
Observations
DataTable 2: Potato Mass
Contents in Test
Tube
Initial Mass of Two Potato Strips
Final Mass of Two Strips
Mass
Difference
% Change in
Mass
Class Average Percent Change in Mass (if available)
a) Distilled Water
b) 1.0 M Sucrose
c) 0.8 M Sucrose
d) 0.6 M Sucrose
e) 0.4 M Sucrose
f) 0.2 M Sucrose
Questions
A. Describe how the potato cylinders changed in their turgidity. Identify which of the solutions were isotonic, hypertonic, and hypotonic in relation to the potato.
B. What would happen to a red blood cell placed in distilled water? Why?
Ex
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42
-
0033
-
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-
01
LAB REPORT
PHOTOS
–
Include
the
digital photos
as attachments or place them right into your report.
Photo #1
-
Take a photo
of the results from the osmosis experiment, by placing the 3 bags (after
drying the outside) on a piece of white paper as background. Write HOT, COLD, AMBIENT
underneath each bag. Get close enough to see the different colors. Th
is photo is after 30 min.
(not 60)
Photo #2
–
Take a photo ...
Identification of GasesHands-On Labs, Inc. Version 42-01.docx
Identification of Gases
Hands-On Labs, Inc.
Version 42-0189-00-02
Review the safety materials and wear goggles when
working with chemicals. Read the entire exercise
before you begin. Take time to organize the materials
you will need and set aside a safe work space in
which to complete the exercise.
Experiment Summary:
You will learn the properties of gases. You will
investigate a series of chemical reactions that
generate different gases with unique properties.
You will generate a series of gases and explore the
properties of gases through flame tests and chemical
reactions. You will also use your results to identify an
“unknown” gas.
EXPERIMENT
© Hands-On Labs, Inc. www.HOLscience.com 1
Learning Objectives
Upon completion of this laboratory, you will be able to:
● Define solids, liquids, and gases.
● Identify the unique properties of gases.
● Explain how gases are identified.
● Describe a gas generation tube and how it is used to isolate gases.
● Perform flame and chemical tests on isolated gases from controlled experiments.
● Categorize gases produced in experimental reactions.
● Analyze experimental results to identify unknown gases.
Time Allocation: 3 hours
www.HOLscience.com 2 ©Hands-On Labs, Inc.
Experiment Identification of Gases
Materials
Student Supplied Materials
Quantity Item Description
1 Aluminum pie pan
1 Baking soda, 1 tablespoon
1 Box of matches
1 Coffee cup
1 Dish soap
1 Hydrogen peroxide, 3% 20 mL
1 Metal spoon
1 Pair of scissors, 4 in
1 Roll of paper towels
1 Sheet of white paper
1 Source of tap water
4 Toothpicks
1 White vinegar, 20 mL
HOL Supplied Materials
Quantity Item Description
1 Drinking straw
1 Gas assembly, copper and plastic tubing in rubber stopper
1 Gas assembly, plastic tube in rubber stopper
2 Pairs of gloves
1 Pair of safety goggles
1 Permanent marker
4 Test tubes, 13 x 100 mm
1 Test tube cleaning brush
3 Short, thin-stem pipets
1 Well plate - 24
1 Experiment Bag: Identification of Gases (or Properties of Gases)
2 - Antacid tablets in bag 2”x 3”
1 - Bromothymol blue- 4 mL in Pipet
1 - Calcium hydroxide, 6 mL in dropper bottle
1 - Hydrochloric acid, 2.0 M, 20 mL in dropper bottle
3 - Pipet bulb, wide-neck with 1/4” stem
1 - Manganese, 4-6 pieces in bag 2” x 3”
1 - Mossy zinc, 4-6 pieces in bag 2” x 3”
www.HOLscience.com 3 ©Hands-On Labs, Inc.
Experiment Identification of Gases
Note: To fully and accurately complete all lab exercises, you will need access to:
1. A computer to upload digital camera images.
2. Basic photo editing software, such as Microsoft Word® or PowerPoint®, to add labels, leader
lines, or text to digital photos.
3. Subject-specific textbook or appropriate reference resources from lecture content or other
suggested resources.
Note: The packaging and/or materials in this LabPaq kit may differ slightly from that which is listed
above. For an exact listing of materials, refer to the Contents List included in your LabPaq.
Ventilator breathing circuits and its sterilization
The document discusses ventilator breathing circuits and their sterilization process. Breathing circuits create an artificial atmosphere between the patient and ventilator. They are produced via plastic injection and extrusion methods using various plastics. Circuits are packaged in Tyvek and sterilized using ethylene oxide which is the preferred method as it is effective and heat is not suitable. The sterilization process involves conditioning, exposure to ethylene oxide gas, and aeration to remove residues over 12-14 hours. Biological and chemical indicators are used to validate the sterilization process was effective.
Quality control of packaging Material and filling Equipment
Complete Information and knowledge about the selection criteria for packaging material and different test used for them .
All this material data is , Collected for seminar in QA SEM 2 , in the Subject of Pharmaceutical Manufacturing Technology .
Which also explain the How Quality control for Filling an pharmaceutical equipment is done.
Optimization of Antimony Leaching From Food Packaging Covers Made Of Low Dens...
This document describes a study that used response surface methodology to optimize conditions for leaching antimony from food packaging made of low density polyethylene. The study investigated the individual and interactive effects of pH, temperature, and retention time on antimony leaching efficiency. A central composite experimental design evaluated 20 experiments to derive a second-order model relating the response (antimony leachability) to the three variables. Analysis of variance showed the model had a high coefficient of determination. The maximum antimony leaching occurred under alkaline pH conditions, high temperature, and short retention time.
Instruments used in microbiology
This document discusses several instruments and techniques used in microbiology laboratories, including:
1. The Polystainer 5300, an automated system that can stain up to 20 slides in 5-10 minutes to aid rapid diagnosis.
2. The BACTEC 9240, an automated blood culture system that can detect bacteria in blood samples within days using sensors to detect changes in oxygen and carbon dioxide levels in culture vials.
3. The Vitek 2, an automated system that uses test cards containing 64 wells with metabolic substrates to identify microbes based on their reactions over 24-48 hours.
A CNT-based artificial nose for food spoilage detection
This document proposes a CNT-based artificial nose for detecting food spoilage. It would consist of a storage box with a carbon nanotube sensor on the cover that detects waste gases produced by bacteria as food spoils. When the CNT sensor detects spoilage-level gases, a light on the box would turn on to warn the user not to eat the food. The CNTs would act as a chemiresistor, changing resistance when exposed to waste gases. This would allow the sensor to quantify gas concentration and determine if the food is still safe to consume, helping prevent food poisoning. The CNTs would be deposited on the cover via spray technique to form the sensing layer.
G2 130-Container-gas-permeability-tester
G2/130 is based on differential pressure method, and can be used to measure gas transmission rate of flexible containers, including various bottles of carbonated drinks, juice, tea and packages of edible oil, dairy products, washing supplies and metal containers.
G2-130 Container Gas Permeability Tester for Dairy Product Packages
G2/130 is based on differential pressure method, and can be used to measure gas transmission rate of flexible containers, including various bottles of carbonated drinks, juice, tea and packages of edible oil, dairy products, washing supplies and metal containers.
G2 130-Container-Gas-Permeability-Tester
G2/130 is based on differential pressure method, and can be used to measure gas transmission rate of flexible containers, including various bottles of carbonated drinks, juice, tea and packages of edible oil, dairy products, washing supplies and metal containers.
TheFinalReport
The document is a final report for a project selecting a polymer material for a beverage bottle. It includes sections on materials selection, statistical analysis, material properties testing, sustainability analysis, physical tests, impact testing, and economic feasibility. Three polymers were chosen for testing: polyethylene terephthalate (PET), polypropylene (PP), and polyvinylchloride (PVC). A variety of tests will be conducted on the materials to determine which polymer best meets the requirements of withstanding drops, being manufacturable at scale, and having the best combination of material properties, sustainability, and cost.
Ipqc for parenterals
The document discusses in-process quality control (IPQC) for parenteral products. IPQC involves controlling manufacturing procedures from raw materials to finished product release. Key IPQC tests for parenterals include clarity testing to detect particulate matter using visual or automated methods, leakage testing of packaging, testing fill volume and pH, and sterility testing. The document outlines various physical, chemical, biological, and microbiological tests performed during IPQC to ensure product quality.
Ipqc for parenterals
The document discusses in-process quality control (IPQC) for parenteral products. IPQC involves controlling manufacturing procedures from raw materials to finished product release. Key IPQC tests for parenterals include clarity testing to detect particulate matter using visual or automated methods, leakage testing of packaging, testing fill volume and pH, and sterility testing. The document outlines various physical, chemical, biological, and microbiological tests performed during IPQC to ensure product quality.
WHEATON Depyrogenation White Paper
Pharmaceutical packaging components must be rigorously depyrogenated to remove bacterial endotoxins which can cause fever and pose safety risks. Two common depyrogenation methods are dry heat in an oven and intensive rinsing with purified water. Glass packaging is typically depyrogenated in ovens at 250°C for 30 minutes, while rubber stoppers are depyrogenated through rinsing with purified water and drying in sterile conditions. Proper validation of depyrogenation processes is necessary to safely reduce endotoxins to acceptable levels for patient safety.
Report waste water
This document describes procedures for determining biochemical oxygen demand (BOD) in a water sample. It defines BOD as a measure of the amount of oxygen used by aerobic bacteria to break down organic matter in water. The document outlines the objective, introduces BOD and the 5-day BOD test, discusses total and carbonaceous BOD, and lists safety procedures for handling wastewater samples.
Ch 1 Introduction to Chemistry Form 4 KSSM.pptx
This document provides an introduction to chemistry for Form 4 students in Malaysia. It discusses the meaning of chemistry and examples of chemicals used in daily life. It also summarizes the contributions of chemistry to technology and careers related to the field. The document outlines the scientific method and provides an example experiment to study the effect of temperature on salt solubility. It describes personal protective equipment and safety procedures in the laboratory, including handling apparatus, storing and disposing of chemicals, and emergency response. Test questions are provided to assess comprehension.
Decon7 Crushes Glutex in Study (Salmonella on Wood and Concrete Carriers)
Lab test results for Decon7 vs Glutex...
Average reduction on WOOD carriers after TEN minutes:
Decon7 1:1 - 5.07 log reduction (99.9991% kill rate)
Glutex 1:256 - 0.30 log reduction (50.13% kill rate)
Average reduction on CONCRETE carriers after TEN minutes:
Decon7 1:1 - 7.82 log reduction (99.999998% kill rate)
Glutex 1:256 - 7.82 log reduction (99.999998% kill rate)
Re-entry time after fogging Decon7 is 8 hours... Glutex is 72 hours.
D7 is nontoxic, nonhazardous, and nonflammable!
IRJET- Dairy Waste Water Treatment using Coconut Shell Activated Carbon and L...
This document presents research on using low-cost adsorbents like coconut shell activated carbon and laterite to treat dairy wastewater. Column chromatography experiments were conducted with the adsorbents in different ratios and contact times to evaluate their effectiveness in reducing various water quality parameters. The results showed that increasing the contact time and using a 2:1 ratio of activated carbon to laterite improved removal efficiencies of parameters like biochemical oxygen demand and chemical oxygen demand the most, with over 60% reduction achieved in some cases. The study demonstrated the potential of these natural materials to treat dairy wastewater in a cost-effective manner.
Similar to Oxygen barrier property test of plastic bottles for dairy drinks (20)
Cell Membranes and TransportHands-on labs, inc. Version 42-00.docx
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Ventilator breathing circuits and its sterilization
Ventilator breathing circuits and its sterilization
Quality control of packaging Material and filling Equipment
Quality control of packaging Material and filling Equipment
Optimization of Antimony Leaching From Food Packaging Covers Made Of Low Dens...
Optimization of Antimony Leaching From Food Packaging Covers Made Of Low Dens...
A CNT-based artificial nose for food spoilage detection
A CNT-based artificial nose for food spoilage detection
G2-130 Container Gas Permeability Tester for Dairy Product Packages
G2-130 Container Gas Permeability Tester for Dairy Product Packages
Decon7 Crushes Glutex in Study (Salmonella on Wood and Concrete Carriers)
Decon7 Crushes Glutex in Study (Salmonella on Wood and Concrete Carriers)
IRJET- Dairy Waste Water Treatment using Coconut Shell Activated Carbon and L...
IRJET- Dairy Waste Water Treatment using Coconut Shell Activated Carbon and L...
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二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
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【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
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本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微6496090
【主营项目】
一.毕业证【q微6496090】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微6496090】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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办理(Sheffield毕业证书)谢菲尔德大学毕业证【微信：6496090 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
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校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
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Oxygen barrier property test of plastic bottles for dairy drinks
- 1. Oxygen Barrier Property Test of Plastic Bottles for Dairy Drinks Source: Labthink Instruments Co., Ltd Dairy drinks are very common consumer products in people’s daily life. Peanut milk, walnut milk and many other beverage containing milk are very popular. Dairy milk is mainly made of fresh milk, which contains a large amount of protein, vitamin and fat. Those nutrients are liable to be oxidized, which should be kept away from light. The packaging materials used for dairy drinks should have sufficient oxygen barrier property. Otherwise, those nutrients may be oxidized and the dairy drinks may get deteriorated. The packaging for dairy drinks include tetra pak, bottles or cans made of plastics or metals. Different packaging materials may have distinct oxygen barrier property. In this article, we take plastic bottle as an example to explain how to test the oxygen barrier property of the packaging for dairy drinks. The testing instrument is Labthink’s OX2/231 Oxygen Transmission Rate Tester. In the tests, the pre-conditioned specimen is mounted between the upper and lower chambers at ambient atmospheric pressure. One chamber contains oxygen and the other chamber is slowly purged by a stream of nitrogen. Due to the concentration difference between the two chambers, oxygen molecules permeate through the specimen into the nitrogen side and are taken to the coulometric sensor where proportional electrical signals are generated. The oxygen transmission rate is then obtained by analyzing and calculating the signals. For package samples, high purity nitrogen flows inside the package, and oxygen flows outside. Figure 1 Common Packaging for Dairy Drinks
- 2. Figure 2. OX2/231 Oxygen Transmission Rate Tester The tests shall be performed according to the following procedures. (1) Condition the specimen in a desiccant container at 23℃ for 72 hours. (2) Remove the specimen from the desiccant container and fix it on a sample support with rapid transparent adhesive. Make sure the specimen is sealed tightly. Figure 3. Seal the Specimen (3) Place the specimen with sample support into the testing instrument and cover the specimen with an aluminum foil bag. (4) Set test temperature, test humidity and other test parameters. Click Start Test to start the tests.
- 3. (5) The test results will be calculated and displayed automaticallyafter tests. For more details about OX2/231 Oxygen Transmission Rate Tester, please visit www.labthink.com About Labthink Instruments Co., Ltd: Labthink Instruments Co., Ltd is one leading supplier of packaging testing instruments, which is headquartered in Jinan, China and operated in Boston, U.S.A.