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1989年由国家技术监督局批准、发布,1990年要实施的一批冶金分析标准列于下: 1.1990年1月1日及2月1日实施的有: GB11261-89 高碳铬轴承钢化学分析法 脉冲加热惰性气体熔融—红外线吸收法测定氧量 GB7731.14-88 钨铁化学分析方法 极谱测定铅量(代替YB 583-63) GB3653.1-88 硼铁化学分析方法 碱量滴定法测定硼量(代替GB3653.1-83) GB4333.7-88 硅铁化学分析方法 火焰原子吸收光谱法测定铝量
In 1989 by the State Bureau of Technical Supervision approved the release of a batch of metallurgical analysis standards to be implemented in 1990 are listed below: 1.1990 January 1 and February 1 are: GB11261-89 high-carbon chromium bearing steel chemical analysis Method of Determination of Oxygen by Method of Pulse Heating Inert Gas Melting-Infrared Absorption GB7731.14-88 Methods of Chemical Analysis of Ferrotitanium Polarographic Determination of Lead (instead of YB 583-63) GB3653.1-88 Methods for Chemical Analysis of Ferroboron Determination of Alkalinity Titration Boron content (instead of GB3653.1-83) GB4333.7-88 Methods for chemical analysis of ferrosilicon - The flame atomic absorption spectrometric method for the determination of aluminum content