在线渗析-离子色谱法测定蔬菜中无机阴离子
On-line Dialysis-Ion Chromatographic Determination of Inorganic Anions in Vegetables
摘 要
采用在线渗析技术与离子色谱法联用测定蔬菜等样品中多种阴离子.样品提取后,取上层清液经渗析后进入分离柱,采用Metrosep A Supp 4-250阴离子交换柱,以1.8 mmol·L-1 Na2CO3与1.7 mmol·L-1 NaHCO3混合溶液为流动相,化学抑制电导检测.方法中各阴离子检出限(3S/N)为1~18 μg·L-1.方法用于复杂基质蔬菜样品中F-、Cl-、NO-2、Br-、NO-3、PO3-4和SO2-4等阴离子的测定,加标回收率均大于78%,相对标准偏差(n=6)在1.8%~6.1%之间.
渗析
阴离子
蔬菜
Ion chromatography
Dialysis
Anion
Vegetable
Abstract
A method of on-line dialysis hyphenated with ion chromatography for the determination of inorganic anions in vegetables was reported in this paper.The vegetable sample was extracted and on-line treated with dialysis and the clean solution was then introduced for separation with the Metrosep A Supp 4-250 Anion Exchanger Column.A mixed solution of 1.8 mmol·L-1 Na2CO3 and 1.7 mmol·L-1 NaHCO3 was used as mobile phase and conductivity detector was used in the determination.DL (3S/N) of the anions in this method were in the range of 1-18 μg·L-1.The proposed method was used for determination of the anions F-,Cl-,Br-,NO-2,NO-3,PO3-4 and SO2-4 in a vegetable sample with complex matrix,giving values of recovery of the anions over 78% and values of RSD′s (n=6) in the range of 1.8% to 6.1%.
中图分类号 O657.7
所属栏目 工作简报
基金项目 农业部行业标准(06101)资助项目
收稿日期 2007/5/10
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备注徐霞(1976-),女,浙江嘉兴人,助理研究员,农产品质量安全与品质研究.
引用该论文: XU Xia,YING Xing-hua,DUAN Bin-wu,ZHU Zhi-wei. On-line Dialysis-Ion Chromatographic Determination of Inorganic Anions in Vegetables[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(11): 1080～1082
徐霞,应兴华,段彬伍,朱智伟. 在线渗析-离子色谱法测定蔬菜中无机阴离子[J]. 理化检验－化学分册, 2008, 44(11): 1080～1082
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参考文献
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【2】朱瑞芝,吴扬,董文光.离子色谱法同时测定蔬菜中若干无机阴离子[J].上海环境科学,1991,10(10):25-27．
【3】袁建平.间接紫外检测离子色谱法同时测定食品中的无机阴离子[J].食品与发酵工业,1995,21(4):40-42．
【4】周梅素,郭东龙.离子色谱法测定蔬菜中硝酸盐含量[J].分析化学,2000,28(8):1056．
【5】蒋蓉,金玉娥,汪国权.离子色谱法测定蔬菜、水果中的亚硝酸盐和硝酸盐[J].分析仪器,2003(4):29-31．
【6】徐霞,应兴华,陈能,等.离子色谱法同时测定蔬菜中亚硝酸盐与硝酸盐[J].环境化学,2005,24(6):733-734．
【7】Haddad P R.Sample cleanup methods for ion chromatography[J].J Chromatogr,1989,482:267-278．
【8】Buldini P L,Mevoli A,Wuirini A.On-line microdialysis-ion chromatographic determination of inorganic anions in olive-oil mill wastewater[J].J Chromatogr A,2000,882:321-328．
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