| 荧光熄灭法测定微量钯 |
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| 引用本文： | 胡守坤,郑杯礼.荧光熄灭法测定微量钯[J].石油化工,1989(8). |
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| 作者姓名： | 胡守坤 郑杯礼 |
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| 作者单位： | 四川大学化学系 成都 |
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| 摘 要： | 在大量溴化十六烷基三甲铵(CTMAB)存在下,在 pH 为6.5的 Na_2HPO_4-NaH_2PO_4的缓冲溶液中,Pd(Ⅱ)与4,5-二溴苯基荧光酮(DBPF)形成1∶2的配合物,使试剂 DBPF-CTMAB的荧光强度定量熄灭。本文研究了体系的最佳测定条件及干扰情况,其激发波长和发射波长分别为362nm 和560nm,工作曲线的线性范围为0.5—9.0μgPd/25ml,最低检测限为20ppb,以此建立了荧光熄灭法测定微量钯的方法,已用于催化剂中钯的测定。
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Fluorescence Quenching Method for Determination of Microamounts of Pd(Ⅱ) |
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| Abstract: | A fluoro-quenching method for determination of microamounts of Pd (Ⅱ)with DBPF and CTMAB in a buffer solution of Na_2HPO_4-NaH_2PO_4 at pH 6.5 hasbeen established The excitation and emission wavelengths are 362 nm and 560nm respectively.The rectilinear range is 0.5—9.0μg/25ml.The detection limit is20ppb.The molar ratio of Pd(Ⅱ)to DBPF is 1:2.The method is applied to thedetermination of Pd-active carbon and Pd-alumina catalysts with satisfactoryresults. |
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