Specification totaln kjeldahl
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The document describes the specifications for a total Kjeldahl nitrogen analyzer system. The system consists of a digestion unit, scrubber unit, and distillation unit. The digestion unit has electrically heated blocks capable of temperatures from 45-450°C and can accommodate at least six 200ml digestion tubes. The scrubber unit is oil-free and collects condensate and acid fumes. The distillation unit has a borosilicate glass steam generator and pump for alkali dispensing. The system requires quality certificates and accessories including spare parts for two years of use.
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All mercury is released from the sample through thermal decomposition.
This eliminates the need for any sample preparation.
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Water purifier ion exchange resin column
The document describes a water purifier using ion exchange resin columns that produces reagent-grade water for trace analysis. It has separate cation and anion exchange columns with a capacity of 25 liters each and can purify water at a rate over 1 liter per minute. Accessories include spare columns, instructions, a cover, and vacuum hose. Key features are an inline conductivity monitor and the ability to regenerate the resin columns.
Water purifier, double distillation unit
This document provides specifications for a double distillation water purification unit. It distills water to a conductivity of 1.0 μS/cm or less at 25°C for generating reagent-grade water. The unit is made of quartz glass with a 1.5 liter/hour capacity. It runs on 220V power and includes a metallic stand, ring clamp, and operation manual. Safety features include over-heating protection and indicators.
Water purifier, distillation unit (automatic)
This document provides specifications for an automatic water distillation unit. The unit distills water to generate reagent water type III with a maximum conductivity of 0.01 mS/cm at 25°C for use in washing and quantitative analysis. It has a stainless steel construction, 1.5 liter per hour capacity, operates on 220VAC power, and has automatic shutoff when water levels are low.
Water geyser (heater)
This document specifies a water geyser (heater) that has a 120 liter capacity, heats water to 90°C with thermostatic control, and requires a 220 VAC ±25%, 47 to 53 Hz power supply for operation in a laboratory setting.
Water bath, general purpose
A general purpose water bath has an inner size of approximately 0.4 x 0.3 x 0.1 meters, is made of stainless steel inside and stove enameled outside, and can maintain temperatures from ambient to 100°C with an accuracy of ±2°C. It has a stainless steel cover with 12 holes and features a drain cock or plug, double-walled insulation, and a pilot lamp to indicate thermostat operation.
Water bath, bacteriological
This document describes the specifications of a water bath used for incubating culture tubes in coliform analysis. The water bath has an inner size of approximately 0.4 x 0.3 x 0.15 meters, is made of stainless steel inside and stove enameled outside, and can maintain temperatures from ambient to 50°C with an accuracy of ±0.1°C. It has a double wall for insulation, a dome lid to hold test tubes vertically, and displays the internal water temperature.
Wash bottle
The document specifies the requirements for a wash bottle used to flush glassware. The wash bottle must be made of polythene, hold 500 ml of liquid, and have a bent nozzle and screw cap. It was last reviewed on October 23, 2007 and is used to wash away any sticking sediment from glassware.
Volumetric flask
The document specifies volumetric flasks that will be used for sediment analyses in a laboratory. The flasks must comply with IS 915-1975, be made of Corning glass or similar material, and come in sizes of 50, 100, 250, and 500 ml with B class accuracy.
Visual accumulation tube
The visual accumulation tube is used to assess particle sizes of sediments. It consists of a vertical transparent settling tube through which sediment samples are passed. Particles settle individually based on terminal velocity related to diameter, and accumulated sediment volume in the tube's narrow end relates to solid weight. It is best for uniform, spherical particles. The analysis involves introducing a small sample and recording accumulated sediment height over time.
Vacuum pump
This document provides specifications for a vacuum pump for general laboratory use. The pump is a single stage pump with a capacity of 50 l/min, capable of reaching a final vacuum of 0.05 mm Hg without ballast or 2 mm Hg with ballast. It has a 200W motor that operates on 220VAC at 47-53 Hz. Accessories include a filter, regulator, gauge, hose, and valve. The pump is designed for noise free operation.
Turbidity meter (nephelometer)
This document provides specifications for a turbidity meter used to directly measure suspended matter in water samples. The turbidity meter has a range of 0 to 1000 NTU in at least 2 ranges, an accuracy of ±2% full scale deflection, and requires a power supply of 220 VAC ±25%, 47 to 53 Hz. Accessories for the turbidity meter include an ambient light shield, 6 spare tubes, a sensor stand, voltage stabilizer, instruction manual, and dust cover.
Tool kit
This tool kit contains basic tools for minor repairs of electrical laboratory equipment, including a set of screwdrivers, pliers, soldering iron, and multi-meter. The tools come in a lockable storage box for organization and security.
Toc analyser, microprocessor controlled
The document specifies the requirements for a microprocessor-controlled TOC analyzer. It must be able to directly measure total carbon, total organic carbon, and purgeable organic carbon in water samples. It uses high temperature catalytic combustion up to 900°C and non-dispersive infrared detection. It must have a measuring range of 1-500 mg/L carbon, precision within 3%, and detection limit of at least 500 ppb carbon. The analyzer and auto-sampler require 240V 50Hz power and it uses nitrogen or high purity air as carrier gases. It includes an auto-sampler, syringes, printer, manuals, spare parts, and application software in English.
Tissue grinder
This document provides specifications for a tissue grinder used to prepare tissue or sediment samples. The grinder must be able to macerate glass fibre filters and is a manual, porcelain device used to homogenize samples for further analysis such as chemical extraction.
Thermometers, set of
This document specifies a set of thermometers for laboratory use, including mercury-filled glass thermometers with three temperature ranges (0-80oC, 10-150oC, 20-250oC) and an accuracy of ±0.5oC, along with a storage box for the thermometers.
Test tubes
This document specifies test tubes for laboratory use in sediment analysis. It outlines that the test tubes should be made of Corning glass or similar material, and lists two standard sizes - 15 x 125 mm and 25 x 200 mm in diameter and height. The test tubes are intended for general use in analyzing sediments in the laboratory.
Test sieves with shaker
The document specifies requirements for test sieves with a shaker. It requires stainless steel sieves that are 200mm in diameter, 50mm in height, and have nominal aperture sizes between 63-250 micrometers. It also requires a shaker capable of holding at least 5 sieves that runs on 220V power. Accessories include a sieve brush and wash bottle. Some sieves can be used manually without the shaker.
Stirrer, magnetic (with hot plate)
This document provides specifications for a magnetic stirrer with a hot plate. It can rotate between 0-1200 rpm and heat with a 300 Watt thermostatically controlled element. The stirrer has a stainless steel top and comes with PTFE coated magnets ranging from 10-50mm in 5mm increments, with two of each size included as accessories.
Sterliser, autoclave
This document provides specifications for a sterilizer autoclave. The autoclave is 0.3 x 0.5 meters in size, made of stainless steel inside and lid with an enameled outside. It operates at a working pressure of 1 bar with a maximum pressure of 1.5 bars. Accessories include a pressure gauge, steam release cock, safety valve, perforated aluminum basket, water level indicator, and lifting arrangement. The autoclave is powered by 220 VAC at 47-53 Hz and uses approximately 2500 Watts.
Stabiliser (cvt)
This document provides specifications for a stabiliser (constant voltage transformer) used to protect sensitive instruments. The stabiliser is a ferro magnetic resonance type that maintains an output of 220 VAC ± 2% from an input of 170-270 VAC at 50 Hz. It has a capacity of 1-3 kVA depending on the instruments, is more than 85% efficient, and includes input/output voltage meters.
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Specification totaln kjeldahl
- 1. Total Kjeldahl Nitrogen Analyser Purpose To measure total nitrogen in water or soil samples Specifications: Brief Description of the System • The analyser should be a semi-automatic system consisting of a digestion unit, a scrubber unit, and a distillation unit Digestion Unit • Should have electrically heated (230 ± 10 Volts, 50 Hz AC) metal blocks. It should be capable of providing a temperature range from 45 - 450oC. Should have inbuilt temperature controller with digital display alongwith manual temperature adjustment. • Should have the capacity to accommodate atleast six numbers of digestion tubes each of atleast 200ml capacity • Should have leakproof integrated condensors (fumes carriers) made up of glass, fixed on a movable panel alongwith Adapter for outlet to the scrubber unit. Scrubber unit • Should be an oil free centrifugal suction type, with manual vacuum adjustment facility. • Corrosion and impact resistant, provided with condensate and acid fumes collection vessels. • Should operate on 220 VAC ±10%, 47 to 53 Hz power supply Distillation Unit • Should be made-up of standard quality borosilicate glass. • Should possess a steam generator made-up of borosilicate glass alongwith heater and have 3 step manual control facility i.e. standby, water inlet and distillation. • Should have inbuilt diaphragm pump alongwith push button for alkali dispensing with manual volume adjustment. • Should have ventilation value. • Should have timer for 5 - 15 minutes with audio signal. • Steam inlet tube should be of PTFE. • Unit should have quick clamping device for digestion tube with adaptor.
- 2. • Should operate on 220 VAC ±10%, 47 to 53 Hz, AC power supply. • Complete unit should provided with one set of digestion tubes alongwith the servicing, operating and maintenance manuals. Quality Certificate • Installation qualification, operational qualification and performance qualification certificate from NABL Accredited Laboratory or US-EPA certificate of performance Accessories • Spares and accessories for its 2 years of continuous use considering expiry dates of the reagents • 1 set of digestion tubes. • Digestion tube stand • Spillage tray for the condensors • Tube removing device