湖北农业科学 ›› 2021, Vol. 60 ›› Issue (13): 114-118.doi: 10.14088/j.cnki.issn0439-8114.2021.13.023

• 检测分析 • 上一篇    下一篇

离子色谱法测定化肥中的无机阴离子和三聚氰胺

梁晨1, 彭浩2, 郑秀瑾1, 邵光印1, 张锦梅1, 张苗苗1   

  1. 1.青岛盛瀚色谱技术有限公司,山东 青岛 266101;
    2.湖南省娄底市生态环境监测中心,湖南 娄底 417000
  • 收稿日期:2020-10-30 出版日期:2021-07-10 发布日期:2021-07-26
  • 作者简介:梁 晨(1994-),女,山东德州人,助理工程师,主要从事离子色谱应用研究,(电话)18363976644(电子信箱)liangchen@qdsrd.com。

Determination of inorganic anions and melamine in fertilizers by ion chromatography

LIANG Chen1, PENG Hao2, ZHENG Xiu-jin1, SHAO Guang-yin1, ZHANG Jin-mei1, ZHANG Miao-miao1   

  1. 1. Qingdao Shenghan Chromatograph Technology Co.,Ltd.,Qingdao 266101,Shandong,China;
    2. Ecological Environment Monitoring Center of Loudi,Loudi 417000,Hunan,China
  • Received:2020-10-30 Online:2021-07-10 Published:2021-07-26

摘要: 利用离子色谱(IC)建立了化肥中无机阴离子和三聚氰胺的色谱分析方法。将化肥样品用7 g/L的三氯乙酸溶液超声提取并离心,上清液经固相萃取柱净化,经净化后溶液中的阴离子用SH-AP-1(250 mm×4.0 mm)作为分离柱,抑制型电导检测器测定;溶液中三聚氰胺用SH-CC-4(200 mm×4.0 mm)作为分离柱,紫外检测器检测。结果表明,离子的质量浓度在一定范围内与其峰面积呈线性关系,标准曲线的线性相关系数r均大于0.999,加标回收率在93.4%~104.4%,测定值的相对标准偏差(n=6)小于4%,该方法可以广泛适用于多种化肥样品中阴阳离子检测。

关键词: 离子色谱法, 化肥, 阴离子, 三聚氰胺

Abstract: Develop a method for the determination of norganic anions and melaminein in fertilizer by ion chromatography(IC). The fertilizer sample was ultrasonically extracted with 7 g/L trichloroacetic acid solution and centrifuged. The supernatant was purified by a solid phase extraction column. The anion in the solution was purified with SH-AP-1 (250 mm×4.0 mm) was a separation column, measured by a suppressed conductivity detector; SH-CC-4 (200 mm×4.0 mm) was used as a separation column for melamine in solution, detected by UV detector. Results show that the mass concentration of anions and cations had a linear relationship with their peak areas within a certain range, and all correlation coefficient(r) were more than 0.999,with the average recoveries range from 93.4% to 104.4%, and the precision(n=6) values below 4%. The method can be widely applied to the detection of anions and cations in a variety of fertilizer samples.

Key words: ion chromatography, fertilizer, anion, melamine

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