National Accreditation Board for Testing & Calibration Laboratories (NABL) is an autonomous society providing Accreditation (Recognition) of Technical competence of a testing, calibration, medical laboratory & Proficiency testing provider (PTP) & Reference Material Producer (RMP) for a specific scope
Dissolve 25 g of
ammonium acetate in 25 ml of water and add 38 ml of 7M hydrochloric acid.
Adjust the pH to 3.5 with either 2M hydrochloric acid or 6M ammonia and dilute
to 100 ml with distilled water.
[Store
this solution at room temperature in Borosil glass bottles with well-fitted
suitable stopper.]
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