【摘要】：建立QuEChERS-氣相色譜-串聯(lián)質(zhì)譜法測定蔬菜中20種多溴聯(lián)苯和多溴聯(lián)苯醚殘留量方法。樣品采用酸化乙腈振蕩提取,無水硫酸鎂與氯化鈉鹽析,經(jīng)十八烷基硅烷鍵合硅膠和乙二胺-N-丙基硅烷凈化,并利用氣相色譜-串聯(lián)質(zhì)譜在選擇反應(yīng)監(jiān)測模式下進(jìn)行檢測,外標(biāo)法定量。1~6溴代聯(lián)苯及聯(lián)苯醚的線性范圍為0.05~5.0 mg/L、7~8溴代聯(lián)苯及聯(lián)苯醚為0.1~5.0 mg/L、9~10溴代聯(lián)苯和聯(lián)苯醚為0.2~5.0 mg/L;相關(guān)系數(shù)(r)均大于0.99,方法檢出限范圍為0.30~17.67 ng/kg。在3種不同蔬菜基質(zhì)中3個(gè)添加水平(0.25、0.5、2.5 mg/kg)的平均回收率為70.5%~118.9%,相對標(biāo)準(zhǔn)偏差為1.3%~11.2%。該方法前處理簡單快速、靈敏度高,具有良好的回收率和穩(wěn)定性,適用于蔬菜中多種多溴聯(lián)苯和多溴聯(lián)苯醚殘留量的測定與確證。
[Abstract]:A method for the determination of 20 kinds of polybrominated biphenyls and polybrominated diphenyl ether residues in vegetables by QuEChERS- gas chromatography-tandem mass spectrometry was established. The sample was extracted by acidified acetonitrile and salted out with anhydrous magnesium sulfate and sodium chloride, purified by octadecyl silane bonded silica gel and ethylenediamine-N-propyl silane. the sample was detected by gas chromatography-tandem mass spectrometry (GC-MS) under the selected reaction monitoring mode. The linear range of 1 脳 6 brominated biphenyl and biphenyl ether is 0.05 mg/L,7~8 brominated biphenyl and biphenyl ether 0.1 鈮，

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