หมายเลขมาตรฐาน : ISO 904:1976
ชื่อเรื่อง : Hydrochloric acid for industrial use — Determination of total acidity — Titrimetric method
The principle consists in titration of a test portion with a standard volumetric solution of sodium hydroxide in presence of bromcresol green as indicator. Replaces ISO Recommendation R 904-1968.
Link : https://www.iso.org/standard/5308.html
