摘要
试样以碱性混合熔剂熔融,酸化浸取、定容,移取部分试液,通过控制测定各元素的酸度,分别用硅钼蓝光度法测定硅、磷铋钼蓝光度法测定磷,分析结果均在允许误差范围内。剩余试液加三乙醇胺及半胱氨酸掩蔽铁、铝及锰等元素的干扰,以氢氧化钾溶液调节pH值>12.5,加钙指示剂,用EDTA标准溶液滴定碳化钙量,取得了令人满意的结果,相对标准偏差硅≤1.4244%,磷≤5.0536%,碳化钙≤0.3464%,满足了快速分析的需要。
The sample was melted with alkaline mixed flux,acid treating,leaching and constant volume. Removing part solution and by controlling and determining the acidity of elements,the silicon-molybdenum blue photometric method was used to determine silicon and phosphor-bismuth-molybdenum blue photometric method to determine phosphor respectively,with all the analytical results within the range of permissible error. As for the remaining test solution,triethanolamine and cysteine were added to mask the disturbance of the elements such as iron,aluminum and manganese,potassium hydroxide solution was used to adjust pH value to more than 12.5. Then the indicator of calcium was added and EDTA standard solution was used to titrate the content of calcium carbide,obtaining satisfactory results,with the relative standard deviations of silicon,phosphorus and calcium carbide being less than 1.424 4%,5.053 6% and 0.346 4% respectively,meeting the requirements in fast analysis.
出处
《山东冶金》
CAS
2011年第5期123-124,共2页
Shandong Metallurgy
关键词
碳化钙合金
分光光度法
硅
磷
碳化钙
calcium carbide alloy
spectrophotometric method
silicon
phosphorus
calcium carbide
