Chelation Value of Polyaminopolycarboxylic Acids
AATCC 168-2018 pdf free.Chelation Value of Polyaminopolycarboxylic Acids and Their Salts: Copper PAN Method.
NOTE: These safety precautions are for information purposes only. Thc precautions arc ancillary to the testing procedures and are not intended to be all inclusive. ft is thc user’s responsibility to usc safe and proper tcchniqucs in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturers recommendations. All OSHA standards and rules must also be consulted and followed.
Good laboratory pr iws should be followed. Wear safety glasses in all laboratory areas.
All chemicals should be handled with care.
In preparing, dispensing and handling glacial acetic acid and sodium hydioxide use chemical goggles or face shield, impervious gloves and an impervious apron. Concentrated acids and bases should be handled only in an adequately ventilated laboratory hood. CAUTION: Always add acid to water.
Cupric nitrate 2.5 hydrate is corrosive to the eye and skin and is harmful if inhaled. It is an oxidiiing material and may react with organic materials. It should be handled only in an adequately ventilated hood,.
Methanol is harmful if inhaled or swallowed and is a flammable liquid. It should be stored in the laboratory only in small containem away from heat, open flames and sparks. This chemical should not be used neat an open flame and should be handled only in an adequately ventilated hood
An cyewash.safcty shower should be located nearby and a self-contained breathing apparatus should be readily available for emergency use.
Exposure to chemicals used in this procedure must be controlled at or below levels set by governmental authorities (e.g.. Occupational Safety and health Administration’s jOSHAJ permissible exposure limits [PEL] as found in 29 CFR 1910.1 tK0; see www.osha.gov for latest version). In addition, the American Conference of (iovernmental Industrial Flygicriists (ACGIH) Threshold Limit Values (TLVs) comprised of time weighted averages (TIN-TWA), short term exposure limits (TLV-STEL) and ceiling limits (TLV-L’) are recommended as a general guide for air Contaminant exposure which should be met (see 14,1).
Conduct the test in triplicate; i.e.. analyze 3 test specimens from a sample.
Do not use aiwninum or metallic weighing pans.
For analysis of solid EDTA. IIEDTA. and DTPA (either free acid or salt forms) weigh a 0.24-0.26 g specimen of the dried chelating agent to an accuracy of 0.01 g.
For analysis of commercial solunon, of salts of the chelating agents. weigh a 0.49-0.51 g specimen of the solution to an accuracy of 0.01 g.
Conditioning If solid chelating agent is being evaluated, dry a 2-g sample at thc appropriate temperature for at least 2 11 and cool in a desiccator before weighing specimens.
Dry free acid forms of chelating agents at 120°C.Dry salt forms of chelating agents at 80°C.AATCC 168 pdf download.Chelation Value of Polyaminopolycarboxylic Acids