Standard No.:	GB 4920-1985
English Name:	Determination of Sulphuric Acid Mist in Tail Gas in Sulphuric Acid Concentration Process - Barium Chromate Colorimetric Method
Chinese Name:	硫酸浓缩尾气硫酸雾的测定 铬酸钡比色法
Chinese Classification:	Z25    Analysis methods for exhaust emission pollutants
Professional Classification:	GB    National Standard
ICS Classification:	13.040.50 13.040.50    Transport exhaust emissions 13.040.50
Issued by:	NEPA
Issued on:	1985-01-18
Implemented on:	1985-8-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	1500 words
Price(USD):	30.00
Delivery:	via email in 1 business day

This standard is applicable to the analysis of sulphuric acid mist in tail gas in sulphuric acid concentration process in fire-explosive factory, and the test range is 100~30000mg /m3.



1 Principle



Sulfate ions will react with barium chromate and generate yellow chromate ions, and the colorimetric measurement is carried out according to the degree of yellow color.

1 Principle
2 Instruments
3 Reagents
4 Operations
5 Calculations
6 Attentions
Additional Explanations: