标准编号:	GB/T 223.25-1994
中文名称:	钢铁及合金化学分析方法 丁二酮肟重量法测定镍量
英文名称:	Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime gravimetric method for the determination of nickel content
中标分类:	H11    钢铁与铁合金分析方法
行业分类:	GB    国家标准
ICS分类:	77.080 77.080    黑色金属 77.080
发布机构:	国家质量监督检验检疫总局
发布日期:	1994-1-17
实施日期:	1994-10-1
标准状态:	valid
替代旧标准:	GB 223.25-1984 钢铁及合金化学分析方法 丁二酮肟重量法测定镍量
翻译语言:	英文
文件格式:	PDF
中文字符数:	3000 字
翻译价格(元):	280.0
交付时间:	付款后 1 个工作日

1 Subject Content and Application Scope This standard specifies a dimethylglyoxime gravimetric method for the determination of nickel content. This standard is applicable to the determination of nickel content in carbon steel, alloy steel, high temperature alloy and precision alloy. Determination range: above 2%. 2 Principle Reduction of iron to divalent with sodium sulfite in the ammonium acetate buffer solution. Using tartaric acid as complexing agent, precipitation of nickel and dimethylglyoxime, at 6.0~6.4 pH value, and separation from such elements as iron, cobalt, copper, manganese, chromium, molybdenum, tungsten and vanadium. weighing nickel dimethylglyoxime dried to constant mass at 145 ±5℃. 3 Reagents