Standard No.:	GB/T 12938-1991
English Name:	Determination of thiosulphate and other related residual chemicals in processed Photographic materials－Iodine-amylose, methylene blue and silver sulphide densitometric methods
Chinese Name:	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
Chinese Classification:	A15    Film and Photographic Technology
Professional Classification:	GB    National Standard
ICS Classification:	37.040.30 37.040.30    Photographic chemicals 37.040.30
Issued by:	CSBTS
Issued on:	1991-5-22
Implemented on:	1992-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	210.0
Delivery:	via email in 1~3 business day

本标准规定了已加工的摄影材料中残留硫代硫酸盐及其分解产物总量测定的三种方法。硫代硫酸根含量测定灵敏度大于0.1μg/cm2，三种方法测定含量范围参照附录B。本标准适用于加工过程中采用硫代硫酸盐定影并经过最后水洗处理的明胶卤化银感光材料。本标准不适用于未经过定影而采取稳定处理的黑白产品。