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钢中微量硼的测定资料已发表了很多,而采用次甲基蓝萃取比色法,灵敏度较高,操作简便。资料采用苯胂酸分离,次甲基蓝萃取比色法测定含铌钢中硼,但不适用于钼含量大干0.1％的钢样,而目前大部分含铌钢中钼含量大于0.1％。为此,本文进一步试验了苯胂酸沉淀分离铌、钽及次甲基蓝测定硼的条件,拟定了
Determination of trace boron in steel has been published a lot of data, and the use of methylene blue extraction colorimetry, high sensitivity, easy to operate. The data were analyzed by phenylarsenic acid separation and methylene blue extraction colorimetric method for the determination of boron in niobium-bearing steels. However, this method was not applicable to steels with a molybdenum content of more than 0.1%. However, the molybdenum content in most niobium steels is more than 0.1%. Therefore, we further tested the conditions for the determination of boron by the precipitation of niobium, tantalum and methylene blue with phenylarsenic acid.