GB/T 30908-2014 (English Version) PDF

Standard No.: GB/T 30908-2014
Language: Chinese, Available in English version
Release Date: 2014
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 30908-2014

Scope: This standard specifies two methods for the determination of boron in photographic processing waste liquid. Method A is the mannitol boric acid complex method, using the titration method of mannitol boric acid complex (an acid stronger than boric acid) to determine borate, and the scope of application is that the boron content is higher than 0.1 mg/L. In the range of 0.1 mg/L~5 mg/L, phosphate was removed by precipitation with lead acetate. In the range of 1 mg/L~100 mg/L, the sample was diluted 25 times, and if the concentration of phosphorus was lower than 500 mg/L, the interference of phosphorus could be removed. Method B is methylene blue spectrophotometry, suitable for boron concentrations ranging from 0.1 mg/L to 1.0 mg/L. This standard applies to the analysis of boron in waste liquid discharged from photographic processing.

GB/T 30908-2014 Referenced Document

GB/T 20432.1-2006 Photography.Photographic-grade chemicals.Test methods.Part 1:General
HJ 493 Water quality.Technical regulation of the preservation and handling of samples
HJ 494 Water quality.Guidance on sampling techniques
HJ 495 Water quality.Technical regulation on the design of sampling programmes
ISO 6353-1:1982 Reagents for chemical analysis; Part 1 : General test methods
ISO 6353-2:1983 Reagents for chemical analysis; Part 2 : Specifications; First series
ISO 6353-3:1987 Reagents for chemical analysis; Part 3 : Specifications; Second series