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