摘要
建立了气相色谱-质谱法(GC-MS/SIM)同时测定蔗汁样品中莠去津和莠灭净的方法,并优化了样品前处理和色谱条件。在优化条件下,两种除草剂在0.00～0.60 mg/L范围内线性关系良好,方法的检出限(S/N=3)均为0.001 mg/L。在加标水平为0.050～0.100 mg/L时,两种除草剂的回收率在93%～106%之间,相对标准偏差(RSD,n=6)为4.4%～10.7%。该方法步骤简单,净化效果好,具有良好的灵敏度、回收率和重复性。
A new method was established for the simultaneous determination of atrazine and ametryn residues in sugarcane juice by gas chromatography - mass spectrometry under selected ion monitoring （GC - MS/SIM）. The pretreatment and chromatographic conditions were optimized. Under the optimal conditions, good linearities were obtained for 2 herbicides in the range of 0. 00 -0. 60 mg/L with detection limits of 0. 001 mg/L for both atrazine and ametryn. The average recoveries of 2 herbicide residues at spiked level of 0. 050 -0. 100 mg/L were in the range of 93% - 106% , with RSDs（n =6） of 4. 4% - 10. 7%. The method showed the advantages of simplicity, repeatability, and sensitivity, and could be applied in the determination of atrazine and ametryn residues in sugarcane juice.
出处
《分析测试学报》
CAS
CSCD
北大核心
2011年第10期1153-1156,共4页
Journal of Instrumental Analysis
基金
广西甘蔗研究所基本科研业务专项项目(G2008011)
广西农科院基本科研业务专项项目(201032)
关键词
气相色谱-质谱
甘蔗
莠去津
莠灭净
gas chromatography - mass spectrometry
sugarcane
atrazine
ametryn
