Standard No.:	GB/T 6150.5-2008
English Name:	Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method
Chinese Name:	钨精矿化学分析方法 钙量的测定 EDTA容量法和火焰原子吸收光谱法
Chinese Classification:	H63    Rare refractory metals and their compounds
Professional Classification:	GB    National Standard
ICS Classification:	77.120.99 77.120.99    Other non-ferrous metals and their alloys 77.120.99
Source Content Issued by:	AQSIQ; SAC
Issued on:	2008-3-31
Implemented on:	2008-9-1
Status:	valid
Superseding:	GB/T 6150.7-1985 Methods for chemical analysis of tungsten concentrates--The atomic absorption spectrophotometric method for the determination of calcium content GB/T 6150.6-1985 Methods for chemical analysis of tungsten concentrates--The EDTA volumetric method for the determination of calcium content
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	120.0
Delivery:	via email in 1~3 business day

本方法规定了钨精矿中钙含量的测定方法。本方法适用于钨精矿中钙含量的测定。测定范围：大于1%--20%。 本部分代替ＧＢ／Ｔ ６１５０．６—１９８５《钨精矿化学分析方法　ＥＤＴＡ 容量法测定钙量》和ＧＢ／Ｔ６１５０．７—１９８５《钨精矿化学分析方法　原子吸收分光光度法测定钙量》。
本部分与ＧＢ／Ｔ６１５０．６—１９８５和ＧＢ／Ｔ６１５０．７—１９８５相比主要变化如下：
———测定方法由原来的焦硫酸钾熔融改为硫磷混合酸溶样，沉淀的草酸钙由原来的灼烧成氧化钙改为高氯酸-硝酸混合酸破坏滤纸；
———扩大了检测范围；
———增加了重复性条款。