GB/T 5686.2-2008 in English

本部分代替ＧＢ／Ｔ５６８６．２―１９８５、ＧＢ／Ｔ７７３０．２―２００２、ＧＢ／Ｔ８６５４．３―１９８８和ＧＢ／Ｔ８６５４．４―１９８８。　 本部分是对ＧＢ／Ｔ５６８６．２―１９８５《锰硅合金化学分析方法重量法测定硅量》、ＧＢ／Ｔ７７３０．２―２００２《锰铁及高炉锰铁化学分析方法　高氯酸脱水重量法测定硅量》、ＧＢ／Ｔ８６５４．３―１９８８《金属锰化学分析方法　钼蓝光度法测定硅量》和ＧＢ／Ｔ８６５４．４―１９８８《金属锰化学分析方法　高氯酸脱水重量法测定硅量》的整合修订。本部分规定了用钼蓝光度法、氟硅酸钾滴定法和高氯酸重量法测定锰铁、锰硅合金、氮化锰铁、金属锰和电解锰中的硅含量。本部分适用于锰铁、锰硅合金、氮化锰铁、金属锰和电解金属锰中硅含量的测定。本部分与ＧＢ／Ｔ５６８６．２―１９８５、ＧＢ／Ｔ７７３０．２―２００２、ＧＢ／Ｔ８６５４．３―１９８８和ＧＢ／Ｔ８６５４．４―１９８８比
较，主要变化如下：
―――方法适用范围规定为锰铁、锰硅合金、氮化锰铁、金属锰和电解金属锰；
―――新增加了氟硅酸钾滴定法；
―――高氯酸重量法是对ＧＢ／Ｔ８６５４．４―１９８８、ＧＢ／Ｔ５６８６．２―１９８５和ＧＢ／Ｔ７７３０．２―２００２进行了整合修改。其主要变化如下：
ａ）试样称样量统一为“３．００ｇ 试料（含硅量在１％ 以上时，称取１．００００ｇ 试料），精确至０．０００１ｇ”；
ｂ）试料分解整合为“碱熔（适用于锰硅试料）”和“酸溶＋残渣处理（适用于金属锰、氮化锰铁和锰铁试料）”；
ｃ）碱熔熔剂用量改为８ｇ～１０ｇ，将加热变黑的熔融物置于７００℃ ～７５０℃ 高温炉中熔融１０ｍｉｎ～１５ｍｉｎ。

Scope

WARNING: Personnel applying this standard should have practical experience in formal laboratory work. This section does not address all possible security issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. This part specifies the determination of silicon content in ferromanganese, manganese-silicon alloy, ferromanganese nitride, metallic manganese and electrolytic manganese by molybdenum blue photometric method, potassium fluorosilicate titration method and perchloric acid gravimetric method. This part is applicable to the determination of silicon content in ferromanganese, manganese-silicon alloy, ferromanganese nitride, metallic manganese and electrolytic metallic manganese. The determination range (mass fraction): 0.001% to 30.00%. Method 1: molybdenum blue photometry, suitable for the determination of silicon content in manganese metal and electrolytic metal manganese, the measurement range (mass fraction) is 0.001-0.60%; method 2: potassium fluorosilicate titration method, suitable for silicon content in manganese-silicon alloy Determination of content, measurement range (mass fraction) 12.00% ~ 30%; method three: perchloric acid gravimetric method, suitable for the determination of silicon content in ferromanganese, manganese-silicon alloy, ferromanganese nitride, metal manganese and electrolytic metal manganese , Determination range (mass fraction) 0.50% ~ 30.00%.