The invention discloses a method for detecting rice hexaconazole residues, the detection method comprises the following steps: extracting samples: weigh prepared rice extract in 5g triangle flask, adding a certain amount of stopper oscillation for 1 hours, and then filtered extract after the shock in sodium chloride the measuring cylinder, lamination stopper after shaking violently; purification: accurate draw layering after the upper liquid phase 10mL, dried by nitrogen, then 2mL hexane hexyl alcohol will dissolve the residue, and the residue dissolved into the silica solid phase extraction pretreatment, finally 15mL eluent by leaching the nitrogen residue dissolved with hexane solution and eluent blow to 3mL; detection: detection of 3mL solution after purification in gas chromatography in the detection process; recovery rate is 98%, the minimum detection limit was 0.0001mg/kg. The method is simple, with good accuracy and precision, and establishes the basis for the study of the final residue and the national standard for the determination of azole alcohol in rice.
【技术实现步骤摘要】
【专利摘要】本专利技术公开了,该检测方法步骤如下:提取样品:称取制备好的稻米5g置于三角瓶中,加入一定量的提取液,盖上塞子振荡1小时,然后将震荡后的提取液过滤在含有氯化钠的量筒中,盖上塞子剧烈振摇后静止分层;净化:准确吸取静置分层后的上层液相10mL,用氮气吹干,再用2mL正己烷溶解残渣,将正己醇及溶解的残渣倒入预处理的硅土固相萃取柱内,最后15mL淋洗液淋洗,用氮气将溶有残渣的正己烷溶液及淋洗液吹至3mL;检测:将净化后的3mL溶液在气相色谱仪中检测;上述检测方法的回收率为98%,最小检出限为0.0001mg/kg。该方法操作简单,具有较好的准确度和精密度,为探讨己唑醇在稻米中最终残留和制定其检测方法的国家标准建立基础。【专利说明】—种检测稻米中己唑醇残留量的方法
本专利技术涉及稻米安全生产
,特别是涉及。
技术介绍
纹枯病是水稻种植过程中的主要病害,每年发生的面积在2.0万hm2以上,对水稻的产量造成较大损失。上个世纪70年代以来,大面积推广使用井R霉素、田安防治纹枯病,并取得了显著的效果,但长期单一施用,使病害产生了一定的抗性,防效也有所下 ...
【技术保护点】
一种检测稻米中己唑醇残留量的方法,其特征在于,该检测方法包括如下步骤:a、提取样品:称取制备好的稻米5g置于三角瓶中,加入一定量的提取液,盖上塞子振荡1小时,然后将震荡后的提取液过滤在含有氯化钠的量筒中,盖上塞子剧烈振摇后静止分层;b、净化:准确吸取静置分层后的上层液相10mL,用氮气吹干,再用2mL正己烷溶解残渣,将正己醇及溶解的残渣倒入预处理的硅土固相萃取柱内,最后15mL淋洗液淋洗,用氮气将溶有残渣的正己烷溶液及淋洗液吹至3mL;c、检测:将净化后的3mL溶液在气相色谱仪中检测,所述气相色谱仪的色谱柱为DB6?50m×0.25mm弹性石英玻璃毛细管柱;上述检测方法的回 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:赵建东,
申请(专利权)人:常熟市梅李镇香园稻米专业合作社,
类型:发明
国别省市:
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