摘要
本文对用甲醛肟法测定配合物中锰含量的条件进行了详细研究，并测定了3种含锰配合物中的锰含量。结果表明，测定波长应为375m，并非大多数文献报道的420舳。测定时试剂加入顺序很关键，应先加样品，再依次加氨水、甲醛肟、盐酸羟胺和EDTA。在0．1-2．5mg/50mL范围内，溶液的吸光度与锰含量呈良好的线性关系。线性相关系数为0．9989；回收实验表明，回收率在98．2％～102．6％之间。
The analytical condition of determining Mn content in complexes by formaldehyde oxime method was investigated. Mn contents in three complexes were obtained. The results show that the maximum absorption wavelength is 375nm rather than 420nm which is reported in a lot of references. The order of reagents adding is important. Mn sample should be added first, then ammonia, formaldehyde oxime, hydrochloric hydroxylamine, and the last EDTA. The absorption is in accordanee with Lambert - Beer law when the concentration of Mn is 0. 1 - 2.5mg/50mL, the correlation coefficient is 0. 9989, and the recovery ratio is between 98.2% - 102.6%.
出处
《贵州科学》
2006年第2期24-27,共4页
Guizhou Science
基金
贵州省科学技术基金项目资助课题
关键词
甲醛肟法
锰
配合物
formaldehyde oxime method
manganese
complex
