| 摘要: |
| 研究了一种快速富集测定微量锰的方法 ,即将锰(Ⅱ)与二溴羟基苯基荧光酮 (DBHPF)和溴化十六烷基三甲铵 (CTMAB)形成的配合物 ,通过微孔滤膜富集 ,用二甲亚砜将滤膜及配合物溶解 ,然后在分光光度计上测定其吸光度。配合物最大吸收波长为592 nm ,表观摩尔吸光系数ε592=4.80×105 L/(mol·cm) ,锰在0～2.4 mg/ L时符合郎伯-比尔定律 ,用于茶叶中微量锰的测定 ,结果满意。 |
| 关键词: 二溴羟基苯基荧光酮 微孔滤膜 分光光度法 锰 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Spectrophotometric determination of trace manganese in tea through dissolving the filter membranes |
|
|
| Abstract: |
| A new preconcentration and determination method of trace manganese was studied.The complex of Mn DBHPF-CTMAB and the microfilter membrane were dissolved in DMSO.The manganese was determined.The maximum absorption wave length was observed at 592 nm with molar absorptivity 4.80×105 L/(mol·cm).For manganese content within 0-2.4 mg/L,Beer's Law is conformed.This method has high sensitivity.Satisfactory results were obtained for the determination of trace manganese in tea. |
| Key words: 2,6,7-trihydroxy-9-(3,5-dibromo-4-hydroxy) phenylf-luorone-3 microfilter membrane spectrophotometric method manganese(Mn) |
