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本文报道新试剂 4 -( 5-溴 -2 -噻唑偶氮 )间苯二酚 ( 5-Br-TAR)为柱前衍生试剂 ,以阳离子表面活性剂作为对离子试剂 ,用含 1 5mmol/ L的 p H 5.8的乙酸 -乙酸钠缓冲溶液、0 .0 5mmol/ L溴化钠、1 0 mmol/ L TBA· Br的乙腈 -甲醇 -水 ( 42∶ 1 3∶ 4 5,V/ V/ V)三元体系为流动相 ,在 C8柱上 2 5min内 HPLC测定了 Nb( )、V( )、Rh( )和 Cr( )的5-Br-TAR螯合物。当 SNR=2时 ,检出限分别为 Nb( ) 1 .0、V( ) 1 .6、Rh( ) 0 .9和 Cr( ) 1 .9μg/ L。该方法用于测定污水中的铬和钒 ,结果良好。
The new reagent 4 - (5-bromo-2-thiazolylazo) resorcinol (5-Br-TAR) was reported as a pre-column derivatization reagent. The cationic surfactant was used as a counter ion reagent, Of acetic acid-sodium acetate buffer solution pH 5.8, 0,05 mmol / L sodium bromide, 10 mmol / L TBA · Br in acetonitrile-methanol-water (42: 1 3: 4 5, V / V / V ) Ternary system was used as the mobile phase. The 5-Br-TAR chelates of Nb (), V (), Rh () and Cr When SNR = 2, the detection limits were respectively Nb () 1.0, V () 1.6, Rh () 0.9 and Cr () 1.9μg / L. The method was used to determine chromium and vanadium in wastewater and the results were good.