摘要
探讨了显色体系的稳定性,其酸度、显色剂用量、样品主要基体以及残余高氯酸对检测的影响。选择了适宜的显色时间、硝酸加入量、显色剂用量等检测条件。磷溶液浓度在2～10 mg/L范围内呈良好的线性关系。检测磷铁中磷含量,回收率可达99.8%～101.4%,相对标准偏差小于2.71%。对磷铁标准样品进行分析,结果同认定值完全一致。
The phosphorus content of ferrophosphorus was determined by vanadium molybdenum yellow differential spectrophotometry. The stability of coloration system was discussed, and the influence of acidity, dosages of color developer, main matrix of samples and residual high chlorine acid was discussed. Selected the detection conditions including the chromogenic time, addition amount of nitric acid and dosages of color developer. The better linear relation was presented when phosphorous solution concentration is 2 N10 mg/L. Determined P content in ferrophsporus, the recovery was up to 99.8%-101.4 %.The relative standard deviation for phosphorus test was below 2.71%. The analysis results of ferrophophorus standard samples were in good agreement with the certified values.
出处
《铁合金》
2012年第1期45-48,共4页
Ferro-alloys
关键词
磷铁
磷
钒钼黄
差示光度法
ferrophosphorus, phosphorus, vanadium molybdenum yellow, differential spectrophotometry
