| 酸性铬深蓝-示波吸附计时电位法快速测定土壤溶液中不同形态铝 |
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| 引用本文： | 干宁,毕树平,徐仁扣.酸性铬深蓝-示波吸附计时电位法快速测定土壤溶液中不同形态铝[J].环境科学学报,2003,23(4):494-498. |
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| 作者姓名： | 干宁 毕树平 徐仁扣 |
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| 作者单位： | 1. 污染控制与资源化国家重点实验室,南京大学化学系,南京,210093
2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金(Project No.49831005&No.20075011)和南京大学分析测试基金资助 |
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| 摘 要： | 报道了酸性铬深蓝-示波吸附计时电位法分别在酸性和碱性条件下直接检测土壤溶液中的无机单核铝AIi]和总单核铝AIa]浓度，并用该法测定了酸消化水样中的总铝AIT]．由AI8]-AIi]间接得到有机单核铝AIo]，AIT]-AIa]得到酸溶态铝AIr]，从而实现了土壤溶液中5种AI形态的电化学测定测定了十多个实际土壤水样，与Driscoll方法所获结果进行了对照，结果基本一致。
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| 关 键 词： | 酸性铬深蓝-示波吸附计时电位法 测定 土壤溶液 铝 环境酸化 |
| 文章编号： | 0253-2468(2003)04-0494-05 |
| 收稿时间： | 2002/7/12 0:00:00 |
| 修稿时间： | 2002年7月12日 |
Fast determination of five aluminum fractions in soil solution samples by a.c.adsorptive oscillochronopotentiometry with acid chrome dark blue |
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| GAN Ning,BI Shuping and XU Renkou.Fast determination of five aluminum fractions in soil solution samples by a.c.adsorptive oscillochronopotentiometry with acid chrome dark blue[J].Acta Scientiae Circumstantiae,2003,23(4):494-498. |
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| Authors: | GAN Ning BI Shuping and XU Renkou |
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| Institution: | State Key Laboratory of Pollution Control and Resource Reuse of China, Chemistry Department, Nanjing University, Nanjing 210093,State Key Laboratory of Pollution Control and Resource Reuse of China, Chemistry Department, Nanjing University, Nanjing 210093 and Nanjing Soil Institute, Chinese Science Academy, Nanjing 210008 |
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| Abstract: | Fast determination of five fractions of aluminum(total AlT, acid soluble Alr, total monomeric Ala, inorganic monomeric Al i, organic monomeric Alo) in soil solution samples under acidified and alkalized conditions by a.c.adsorptive oscillochronopotemtiometry in the presence of acid chrome dark blue (ACDB) is presented in this paper. The method is based on the different competitive complexation capacities of ACDB and natural organic matter (NOM) at two pHs 4.9 and 8.0. Inorganic monomeric Al was detected at pH 4.9 (0.5mol·L-1 NH 4Ac HAc 7×10-4 mol·L-1 ACDB), while total monomeric Al is determined at pH8.0 (0.5mol·L-1 KCl 0.1mol·L-1 Na 2B 4O 7 6×10-4 mol·L-1 ACDB). The method was successfully employed to determine five Al fractions in more than ten soil solution samples. The results were in agreement with those of Driscoll's speciation method. |
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| Keywords: | acid chrome dark blue a c adsorptive oscillochronopotentiometry aluminum speciation soil water |
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