| 气相色谱法测定三七中苯醚甲环唑残留量 |
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| 引用本文： | 张雪燕.气相色谱法测定三七中苯醚甲环唑残留量[J].湖南农业大学学报(自然科学版),2010,36(2):229-232. |
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| 作者姓名： | 张雪燕 |
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| 作者单位： | 1. 云南省农业科学院,农业环境资源研究所,云南,昆明,650205
2. 云南省文山三七研究所,云南,文山,663000 |
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| 基金项目： | 国家"十一五"科技支撑计划项目子课题 |
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| 摘 要： | 建立了三七中苯醚甲环唑残留量的分析方法,并应用于三七样品检测.样品采用丙酮超声波提取,硅胶和中性氧化铝柱净化,GC-ECD检测.方法的最小检出量(LOD)为0.004ng,最低检测限(LOQ)为0.02mg/kg;样本中添加苯醚甲环唑0.02～0.5mg/kg时(n=5),平均回收率为80.6%～95.0%,相对标准偏差(RSD)为1.6%～11.9%,方法的灵敏度、精密度和准确度均满足农药残留分析要求.市场随机抽样检测表明,三七中苯醚甲环唑残留量为0.02~0.6mg/kg,检出率47%,检出率和残留水平从高到低均依次为三七花、三七须根、三七块根.
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| 关 键 词： | 三七 苯醚甲环唑 残留 气相色谱法 |
| 收稿时间： | 2009/11/5 0:00:00 |
| 修稿时间： | 2010/1/12 0:00:00 |
Determination of difenoconazole residue in Panax notoginseng by gas chromatography |
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| zhangxueyan.Determination of difenoconazole residue in Panax notoginseng by gas chromatography[J].Journal of Hunan Agricultural University,2010,36(2):229-232. |
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| Authors: | zhangxueyan |
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| Institution: | Institute of Agro-Environmental Resources, Yunnan Academy of Agricultural Science |
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| Abstract: | A residue analytical method was developed for the determination of difenoconazole in Panax notogineseng. Difenoconazole residues were extracted by ultrasonic from Panax notogineseng with acetone, purified by a column of aluminum and a column of silica gel in turn , then detected by GC-ECD. Its limit of detection was 0.004 ng, its minimum detectable concentration of difenoconazole in the samples was 0.02 mg/kg. Its average recovery of ranged from 80.6% to 95.0% and its relative standard deviation ranged from 1.6% to 11.9% when the samples are spiked difenoconazole at 0.02~0.5 mg/kg(n=5) level. These results showed that in sensitivity, precision and accuracy, the method met the demand of pesticide residue analysis. Market random tests showed that difenoconazole residues in Panax notogineseng between 0.02 to 0.6 mg / kg, the detection rate was 47%, the detection rate and residue levels from high to low were Panax notoginseng flowers, Panax notoginseng fibril roots, Panax notoginseng in turn. |
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| Keywords: | Panax notoginseng difenoconazole residue gas chromatography |
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