A refractometer is an instrument that measures the refractive index of liquids to determine concentration. It works by measuring how much a light ray bends when passing from air into the liquid sample. The refractive index depends on factors like temperature, wavelength of light, and density of the medium. Common uses of refractometers include measuring sugar content in solutions like checking degrees Brix in fruit juices.
Intermediate state of mesophases & halfway between isotropic liquid &solid crystal.
In solid crystal, basic unit display translational long range order, with center of molecule located on crystal lattice &display orientational order.
In isotropic liquid, basic unit do not preset positional or orientational long rang order.
Intermediate state of mesophases & halfway between isotropic liquid &solid crystal.
In solid crystal, basic unit display translational long range order, with center of molecule located on crystal lattice &display orientational order.
In isotropic liquid, basic unit do not preset positional or orientational long rang order.
The refractive index or index of refraction of a substance is a measure of the speed of light in that substance. It is expressed as a ratio of the speed of light in vacuum relative to that in the considered medium.
Instrumentation of Thin Layer ChromatographyTanmoy Sarkar
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which a material called the stationary phase is fixed.
Thin-layer chromatography is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of an inert substrate such as glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide, or cellulose.
SPECTROSCOPY
INFRARED SPECTROSCOPY
HISTORY
PRINCIPLE
MODES OF VIBRATION
INSTRUMENTATION
SAMPLE HANDLING
FTIR (FOURIER TRANSFORM INFRARED) SPECTROMETER
PRINCIPLE
INSTRUMENTATION
WORKING
DISPERSIVE VERSUS FTIR
ADVANTAGES & DISADVANTAGES OF FTIR WITH APPLICATIONS
FACTORS AFFECTING VIBRATIONAL FREQUENCIES
IR SPECTRA REGION
IR SPECTRA INTERPRETATION
EXAMPLES
ADVANTAGES AND DISADVANTAGES OF IR
APPLICATIONS OF IR
Reference
Amperometry refers to the measurement of current under a constant applied voltage and under these conditions it is the concentration of analyte which determine the magnitude of current.
In Amperometric titrations, the potential applied between the indicator electrode (dropping mercury electrode) and the appropriate depolarizing reference electrode (saturated calomel electrode) is kept constant and current through the electrolytic cell is then measured on the addition of each increment of titrating solution. It is a form of quantitative analysis.
Otherwise called as Polarographic or polarometric titrations.
Principles of Turbidity measurement, Electrical conductivity measurement, TDS...Mahboobullah Dawlat zaada
how turbidity in the water is measured and what is its principle ?
how electrical conductivity is measured and what is its principle ?
how total dissolved solids are determined in a liquid and what is its principle ?
how total suspended solids are determined in a liquid and what is its principle ?
The refractive index or index of refraction of a substance is a measure of the speed of light in that substance. It is expressed as a ratio of the speed of light in vacuum relative to that in the considered medium.
Instrumentation of Thin Layer ChromatographyTanmoy Sarkar
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which a material called the stationary phase is fixed.
Thin-layer chromatography is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of an inert substrate such as glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide, or cellulose.
SPECTROSCOPY
INFRARED SPECTROSCOPY
HISTORY
PRINCIPLE
MODES OF VIBRATION
INSTRUMENTATION
SAMPLE HANDLING
FTIR (FOURIER TRANSFORM INFRARED) SPECTROMETER
PRINCIPLE
INSTRUMENTATION
WORKING
DISPERSIVE VERSUS FTIR
ADVANTAGES & DISADVANTAGES OF FTIR WITH APPLICATIONS
FACTORS AFFECTING VIBRATIONAL FREQUENCIES
IR SPECTRA REGION
IR SPECTRA INTERPRETATION
EXAMPLES
ADVANTAGES AND DISADVANTAGES OF IR
APPLICATIONS OF IR
Reference
Amperometry refers to the measurement of current under a constant applied voltage and under these conditions it is the concentration of analyte which determine the magnitude of current.
In Amperometric titrations, the potential applied between the indicator electrode (dropping mercury electrode) and the appropriate depolarizing reference electrode (saturated calomel electrode) is kept constant and current through the electrolytic cell is then measured on the addition of each increment of titrating solution. It is a form of quantitative analysis.
Otherwise called as Polarographic or polarometric titrations.
Principles of Turbidity measurement, Electrical conductivity measurement, TDS...Mahboobullah Dawlat zaada
how turbidity in the water is measured and what is its principle ?
how electrical conductivity is measured and what is its principle ?
how total dissolved solids are determined in a liquid and what is its principle ?
how total suspended solids are determined in a liquid and what is its principle ?
this gives students good knowledge about the preparation
of fertilizers using various elements like phosphorous and
nitrogen also gives various observation table with results regarding usage of each element in fertilizer.
1. Define Refraction Of Light
2. Discussion on Examples Of Refraction
3. Describe the action of CONVEX and CONCAVE mirror
4. Define the terms related to SPHERICAL mirrors
5. Describes the rules for making ray diagrams for SPHERICAL mirror
6. Distinguish between REAL and VIRTUAL image
7. Image formation using CONCAVE and CONVEX mirror.
8. Refraction Prisms: Dispersion Of Light
9. Uses Of CONCAVE and CONVEX mirror
Speaks about the different aspects of flow measurement i.e. flow types, fluid types, its units, selection parameters; definition of common terms, coanda effect coriolis effect . it also speaks about the factors affecting flow measurement.
Overview on “Computer System Validation” CSVAnil Sharma
HI this is Anil Sharma, Executive Compliance in USV LTD. I want to share my brief knowledge on CSV with you. I hope my presentation will help you to understand basics of CSV.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
2. When a ray of light passes
from one medium to another
it suffer refraction.
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3. What is a Refractometer?
A refractometer is a simple instrument used for measuring concentrations of aqueous
solutions. It requires only a few drops of liquid, and is used throughout
the food, agricultural, chemical, and manufacturing industries.
What is Refractive Index?
Refractive Index n is the speed of light in vacuum relative to the speed of light in the
considered medium: n = speed of light in vacuum / speed of light in medium
n = c/v
n = Refractive index.
c = Speed of light in vacuum.
v = Velocity of light in Medium.
Example: Water has a refractive index of 1.33 which means that the light travels 1.33 faster
in vacuum than in water. The refractive index is a physical property of the liquid.
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4. 4 of 12
Snell’s law
Snell's law states that the ratio of the sines of the angles
of incidence and refraction is equivalent to the ratio
of phase velocities in the two media, or equivalent to
the reciprocal of the ratio of the indices of refraction:
θ1 is the angle of Incidence.
θ2 is the angle of Refraction.
V1 is the velocity of light in the Air.
V2 is the velocity of light in the Medium.
N1 Refractive index if Air.
N2 Refractive index if Medium.
6. How a Refractometer Works
When light enters a liquid it changes direction; this is called refraction.
Refractometers measure the degree to which the light changes direction, called the angle of
refraction. A refractometer takes the refraction angles and correlates them to refractive index
(nD) values that have been established. Using these values, you can determine the
concentrations of solutions.
For example, solutions have different refractive indexes depending on their concentration in
water.
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7. Refraction of light into New Medium:
Light changing speed in a new medium creates a bending.
If light is traveling slower in the new medium i.e. from less dense to more dense medium
like from air to water, it will bend towards the normal line. so that angle of the refraction is
less than angle of incidence.
If light is traveling faster in the new medium i.e. from more dense to less dense medium like
from water to air, it will bend away from the normal line. so that angle of the refraction is
more than angle of incidence.
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8. 8 of 12
Influence of temperature and wavelength
The refractive index depends on the temperature of the media:
The higher the temperature of a media that means the liquid becomes less dense and less
viscous, causing light to travel faster in the medium. Thus higher the speed of light in the
media and the lower its refractive index.
In vacuum light travels at a constant speed (c), independent of its wavelength. In all other
media, however, the speed of light depends as well on its wavelength: The shorter the
wavelength of the light, the higher its speed.
The refractive index has thus always to be stated together with the wavelength of the light
used for the measurement and the temperature of the media.
Its important to use monochromatic lights to prevent dispersion of light into different
colours.
The refractive index is normally measured at a temperature of 20°C using light with the
wavelength of the sodium D line (589.29 nm) and is therefore expressed as nD20.
9. 9 of 12
Degrees Brix (symbol °Bx) is the sugar content
of an aqueous solution. One degree Brix is 1
gram of sucrose in 100 grams of solution and
represents the strength of the solution
as percentage by mass.
The higher the temperature of a media that
means the liquid becomes less dense and less
viscous, causing light to travel faster in the
medium. Thus higher the speed of light in the
media and the lower its refractive index.
10. 10 of 12
Uses of Refractive index
It can be used to characterized liquid and solid samples.
Measure the concentration of solutions e.g. sugar content in alcohol.
It can use to check sample for purity.
RI can be used for qualitative & quantitative analysis as well as structural analysis.
The refractive index of a substance is dependant on the wavelength λ of the light and
the temperature T of the substance.
11. 11 of 12
CSV of Refractometer
• URS (J-QC-URS-RFM-01)
Business Requirements
Interface Requirements
Security and safety Requirements
Electronic Records, Reports and Electronic Signature Requirements
Audit Trail Requirements
Backup, Archival and Restoration Requirements
• HLRA (J-QC-HLRA-RFM-01)
12. 12 of 12
CSV of Refractometer
• IQ (J-QC-IQ-RFM-01)
Verification of pre-requisite
Physical Identification
Verification of system hardware
Identification of software version
Environmental Condition Verification
Verification of Software Backup
Verification of system startup and shutdown
Verification of Application installation of Directory
Date & Time Synchronization Verification
OPQ (J-QC-OPQ-RFM-01)
Verification of Draft/Approved SOP
IQ protocol Completion Verification
Training Verification, Physical and Logical Security Verification
User Management Verification, Password Policy Verification
Verification of Access Control, Verification of Communication Failure