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。
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.
作者
梁晨
彭浩
郑秀瑾
邵光印
张锦梅
张苗苗
LIANG Chen;PENG Hao;ZHENG Xiu-jin;SHAO Guang-yin;ZHANG Jin-mei;ZHANG Miao-miao(Qingdao Shenghan Chromatograph Technology Co.,Ltd.,Qingdao266101,Shandong,China;Ecological Environment Monitoring Center of Loudi,Loudi417000,Hunan,China)
出处
《湖北农业科学》
2021年第13期114-118,共5页
Hubei Agricultural Sciences
