蓝草, 邵琳智, 陈思敏. Rapid Determination of Chloramphenicol in Cosmetics Using Direct Real-time Analysis-High Resolution Mass Spectrometry[J]. 2019, 38(12): 1503-1506.
蓝草, 邵琳智, 陈思敏. Rapid Determination of Chloramphenicol in Cosmetics Using Direct Real-time Analysis-High Resolution Mass Spectrometry[J]. 2019, 38(12): 1503-1506.DOI: doi:10.3969/j.issn.1004-4957.2019.12.016.
A method for the determination of chloramphenicol in cosmetics was developed using direct real time analysis-high resolution mass spectrometry.The sample was ultrasonically extracted with ethanol
then diluted 1∶1 by volume with water
and finally injected with a 12 Dip-it Samplers.The instrument parameter were optimized to obtain the sensitive and accurate determination for chloramphenicol.At a sample introduction rate of 0.3 mm/s
high intensity of [M-H]-ions for chloramphenicol were observed in the negative ion and Full MS-PRM mode by utilization of high purity helium gas at 500 ℃.The calibration curve for chloramphenicol was linear in the range of 0-100 mg/L with a correlation coefficient of 0.998 4.The limit of quantitation(LOQ) of the method was 3.0 mg/kg.Recoveries for chloramphenicol at three spiked levels of 3.0
6.0
30 mg/kg were in the range of 70.2%-119%
with relative standard deviations(RSD) of 8.4%-17%.With its rapid analysis
simple pretreatment steps and low matrix interference
the method was suitable for the rapid determination of chloramphenicol in cosmetics.