研究论文
王顺荣,金秀兰,常俊合,江桂斌.毛细柱气相色谱法测定天然水中痕量铍、铝、铬[J].环境科学学报,1988,8(4):446-452
毛细柱气相色谱法测定天然水中痕量铍、铝、铬
- CAPILLARY GAS CHROMATOGRAPHIC DETERMINATION OF BERYLLIUM, ALUMINUM AND CHROMIUM IN NATURAL WATER
- 基金项目：
- 作者
- 单位
- 王顺荣
- 中国科学院生态环境研究中心, 北京
- 金秀兰
- 中国科学院生态环境研究中心, 北京
- 常俊合
- 中国科学院生态环境研究中心, 北京
- 江桂斌
- 中国科学院生态环境研究中心, 北京
- 摘要：介绍一个用毛细柱气相色谱法同时测定铍、铝、铬酌新方法。在pH为5.6的醋酸-醋酸钠缓冲溶液中,铍、铝、铬与三氟乙酰丙酮生成挥发性和热稳定性的金属整合物。可萃取至苯中,注射至熔融石英WCOT-OV—101柱上,在140℃分离测定,用电子捕获检测器检测。铍、铝、铬的回收率分别为83—103％,88—105％,90—103％。变异系数分别为6.5％,6.5％,2.0％。可用于天然水中亚ppb级铍、铝、铬的分析。测定了海水、河口水、矿泉水、雪水等样品。
- Abstract：A new method of simultaneous determination of Be, A1 and Cr by capillary gas chromatography was developed.Be, Al and Cr can form volatile and thermal stable chelates with trifluoroacetylacetone in acetic-acetate buffer solution, which can be well separated on the fused silica WCOT OV-101 column at 140℃ and detected with electron capture detector.The detection limits of the method for Be, Al and Cr are 5×10-13, 1.6×10-12 and 1×10-12 g respectively.The recoveries of Be, Al and Cr are 82-102%, 100-105% and 86-103% and the variation coefficients are 6.5, 6.5 and 2.5% respectively.Be, Al and Cr in a number of natural water samples were measured using the procedure with the satisfactory results.
- Key words：Be Al Cr capillary GC trifluoroacetylacetone
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