Simultaneous Determination of 16 Phthalates in Baijiu by MSPE-GC-BID
A method of magnetic solid phase extraction combined with gas chromatography-barrier discharge ionization detector(MSPE-GC-BID)was established for the determination of 16 phthalates in Baijiu,and the conditions of magnetic solid phase extraction were optimized.The method used 50.0 mg magnetic adsorbent and extracted at 50 ℃ for 10 min.Then the target substances were desorbed at 50 ℃ for 15 min in a 2.0 mL mixture of acetone/ethyl acetate solution(9∶1,V/V)and detected on the system.The inlet temperature of gas chromatography was 270 ℃,and the chromatographic separation column used a CD-5(30 m×0.25 mm×0.25 µm,5％phenyl-polydimethylsiloxane)quartz capillary column.The components were separated under programmed temperature mode,and the BID detector temperature was 290 ℃.The discharge gas flow rate was 25.0 mL/min,and the volume of non split injection was 1 μL.The results showed that there was a good linear relationship among the 16 phthalates in the concentration range of 20.0 ng/mL to 3000.0 ng/mL,with correlation coefficients between 0.9989 and 0.9998,recovery rates of 62.4％to 127.1％,and detection limits of 0.12 ng/mL to 0.49 ng/mL.The method was simple,accurate and precise,and could be used for the determination of 16 phthalates in Baijiu samples.
magnetic solid phase extractiongas chromatographybarrier discharge ionization detectorphthalatesBaijiu
万方数据
维普
