CAJ | 학술논문

本文报道铬蓝黑R-示波计时电位法快速测定天然水中不同形态的铝。在0.5 mol/L 乙酸-乙酸铵-1×10-3 mol/L铬蓝黑R（pH 4.6）底液中，铝-铬蓝黑R铬合物在-0.80 V电位处产生灵敏切口，切口深度与铝浓度成正比，线性范围为 8×10-7～6×10-5 mol/L，检测下限为6×10-7 mol/L，相对标准偏差为4.8%（n=10，4×10-5 mol/L Al）。应用该法测定了天然水中不同形态的铝浓度，并同Driscoll的MIBK-GF/AAS法进行了比较，结果基本一致。
본문보도락람흑R-시파계시전위법쾌속측정천연수중불동형태적려。재0.5 mol/L 을산-을산안-1×10-3 mol/L락람흑R（pH 4.6）저액중，려-락람흑R락합물재-0.80 V전위처산생령민절구，절구심도여려농도성정비，선성범위위 8×10-7～6×10-5 mol/L，검측하한위6×10-7 mol/L，상대표준편차위4.8%（n=10，4×10-5 mol/L Al）。응용해법측정료천연수중불동형태적려농도，병동Driscoll적MIBK-GF/AAS법진행료비교，결과기본일치。
Fast speciation of aluminum in natural waters by a.c. oscillochronopotenmetry in the presence of eriochrome blue black R(EBBR) is presented in this paper. In 0.5 mol*L-1 NH4Ac-HAc buffer solution(pH 4.6), Al-EBBR complex yields one incision on the dE/dt-E oscillogram at the potential of -0.8 V when adding Al in the solution. The incision depth is linearly proportional to the Al concentration in the range of 8×10-7～6×10-5 mol*L-1. The detection limit is 6×10-7 mol*L-1 and the relative standard deviation is 4.8% for 4×10-5 mol*L-1 Al(n=10). The proposed method has been applied to the direct determination of different forms of Al in natural waters, including total Al, total monomeric Al and inorganic monomeric Al. The results is found to be in good agreement with those obtained by the Driscoll's method.