China 'GB/T 12938-1991
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 12938-1991
Determination of thiosulphate and other related residual chemicals in processed photographic materials--Iodine-amylose，methylene blue and silver sulphide densito-metric methods 已加工的摄影材料中硫代硫酸盐及其他相关化学残留物的测定方法 碘-直链淀粉法、亚甲蓝法和硫化银密度法
Issued Date:1991-05-22
Implemented Date:1992-05-01
Issued by:
The Standardization Administration of the People's Republic of China
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