摘要
研究了Cr (Ⅵ )催化H2 O2 氧化溴甲酚红 (BR)的反应。在HAc NaAc介质中 ,以溴化十六烷基三甲铵 (CTMAB)为增敏剂 ,测定波长为 5 86nm ,Cr (Ⅵ )浓度在 0～ 0 0 8μg/mL范围内与吸光度呈线性关系。方法灵敏 ,选择性好 ,用于花旗参中铬含量的测定 。
The reaction,catalysis of the oxidization of H 2O 2 on BR by Cr(Ⅵ),is studied.The concentration of Cr(Ⅵ) between 0～0.08 μg/mL has linear relation with absorption degree in the HAc-NaAc medium.The determination wave is 586 nm and the CTMAB is used as sensitizing agent.The proposed method proves to be sensitive and selective,and has applied to verify microamounts of chrome in Ginseng with satisfactory results.
出处
《广东微量元素科学》
CAS
2004年第10期54-56,共3页
Trace Elements Science
关键词
光度测定
花旗参
铬
spectrophotometry
Ginseng
chromium
