Determination of residue of ethephon in mango puree by capillary gas chromatography with AutoHS headspace sampler.
Fu ChengYu, Li Ying, Kong XiangHong, Li JianHua, He Qiang, Zou Yang, Zhang Lu
Author Affiliation: Shaanxi Entry-Exit Inspection and Quarantine Bureau, 10 Hanguang North Road, Xi'an 710068, China.
Journal of Food Safety and Quality 6 : 4389-4392
Abstract : Objective: To establish a method for the determination of the ethephon residue in mango puree by combining AutoHS headspace sampler with gas chromatography (GC). Methods: After charging mango puree into headspace sample bottle, a certain amount of saturated KOH solution were added. Then the headspace bottle was heated up to 80°C and ethylene released was detected by GC with a FID detector. The quantitation of ethephon was made by standard curve. Results: The method showed a good linearity ranged from 0.5 to 100.0 µg/mL of ethephon concentration with correlation coefficients above 0.9999. The determined average recoveries were 79.9%, 85.4% and 86.8% at the spiked level of 0.02, 0.05 and 0.10 mg/kg, respectively. The relative standard deviation was between 3.97%-5.26%. Conclusion: The method is simple, rapid, economical and practical, and the analyzed result is accurate and reliable, which is suitable for the rapid determination of sample.