Standard No.:	GB/T 18996-2021
English Name:	Silver jewellery alloys—Determination of silver—Volumetric (potentiometric) method using sodium chloride or potassium chloride
Chinese Name:	银合金首饰 银含量的测定 氯化钠或氯化钾容量法(电位滴定法)
Professional Classification:	GB    National Standard
Issued by:	SAMR; SAC
Issued on:	2021-10-11
Implemented on:	2022-5-1
Status:	valid
Superseding:	GB/T 18996-2003 Determination of silver in silver jewellery alloys--Volumertic (potentiometric) method using sodium chloride or potassium chloride
Language:	English
File Format:	PDF
Word Count:	6500 words
Price(USD):	160.00
Delivery:	via email in 1~3 business day

本文件描述了采用氯化钠或氯化钾容量法（电位滴定法）测定银合金首饰中银含量的方法。
本文件适用于银含量800‰～999‰的银合金首饰、工艺品及其材料。这些合金中可能含有铜、锌、镉和钯，这些元素除钯必须在开始滴定前进行沉淀分离外，其余元素的存在不会干扰本测定方法。