Standard No.:	GB/T 6150.12-2008
English Name:	Methods for chemical analysis of tungsten concentrates - Determination of silicon dioxide content - The silicomolybdenum blue spectrophotometry and the gravimetry
Chinese Name:	钨精矿化学分析方法 二氧化硅量的测定 硅钼蓝分光光度法和重量法
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
Issued by:	AQSIQ; SAC
Issued on:	2008-6-17
Implemented on:	2008-12-1
Status:	superseded
Superseded by:	GB/T 6150.12-2023 Methods for chemical analysis of tungsten concentrates―Part 12:Determination of silicon dioxide content―Silicomolybdenum blue spectrophotometry and gravimetry
Superseded on:	2024-3-1
Superseding:	GB/T 6150.14-1985 Methods for chemical analysis of tungsten concentrates; The molybdenum blue photometric method for the determination of silicon dioxide content
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	150.00
Delivery:	via email in 1~3 business day

ＧＢ／Ｔ６１５０《钨精矿化学分析方法》分为１７部分,本部分为ＧＢ／Ｔ６１５０的第１２部分。本方法规定了钨精矿中二氧化硅含量的测定方法。本部分代替ＧＢ／Ｔ６１５０．１４—１９８５《钨精矿化学分析方法　钼蓝光度法测定二氧化硅量》.本方法适用于钨精矿中二氧化硅含量的测定。测定范围（质量分数）：０．５０％～３．００％。本部分与ＧＢ／Ｔ６１５０．１４—１９８５相比主要变化如下：
———采用两种方法测定钨精矿中的二氧化硅量；
———方法１测定范围由０．５０％～１０．００％修订为０．５０％～３．００％；增加了重复性与质量保证和控制条款；
———方法２为新增方法，采用重量法测定高含量二氧化硅量。