China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (12): 4174-4180.doi: 10.16431/j.cnki.1671-7236.2020.12.042

• Environmental Safety • Previous Articles    

Detection of Doxycycline in Soil Using Solid Phase Extraction and High Performance Liquid Chromatography-Ultraviolet

XU Xiangyue1,2, MA Wenjin1,2, AN Boyu1,2, WANG Hanyu1,2, CHENG Guyue1,2, LIU Zhenli1,2, HUANG Lingli1,2   

  1. 1. Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products(Wuhan), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural Univeristy, Wuhan 430070, China;
    2. Key Laboratory for Detection of Veterinary Drug Residues of Ministry of Agriculture and Rural Affairs, National Reference Laboratory of Veterinary Drug Residues, Huazhong Agricultural Univeristy, Wuhan 430070, China
  • Received:2020-05-21 Online:2020-12-20 Published:2020-12-18

Abstract: In order to investigate the pollution status of DOX in soil and reduce the detection cost,a detection method of DOX in three soils was established by solid phase extraction and high performance liquid chromatography (HPLC-UV) in this study.The mixture of acetonitrile and Na2EDTA-Mcllvaine (1:1,V/V) was used as extraction reagent for soil samples.HLB solid phase extraction column was used for enrichment and purification.Agilent ZORBAX SB-C18 (4.6 mm×250 mm×5 μm) column was used for separation.0.01 mol/L oxalic acid (A),acetonitrile (B) and methanol (C) were used as mobile phase system for HPLC detection at 355 nm.The limit of detection (LOD) was determined by 3 times S/N and the limit of quantitation (LOQ) was determined by 10 times S/N.The results showed that DOX peaked in 10 min.In the range of 0.1-10 μg/mL,the linear relationship between the peak area of DOX and the concentration was good.The regression equation was y=22 747x+3.3256,and the correlation coefficient was 0.9999.The LOD and LOQ of DOX in this method were 0.05 and 0.1 mg/kg,respectively.When the added concentration of DOX was 0.1 μg/g in soil,the recoveries of DOX in loam,sandy loam and sandy were 58.96%,75.84% and 83.06%,respectively,and the coefficient of variation(CV) was 1.00%-9.54%.The recoveries of DOX in loam,sandy loam and sandy were 63.89%,70.48% and 81.07%,respectively,and the CV 2.40%-8.83% when added 0.2 μg/g.The recoveries of DOX in loam,sandy loam and sandy soil was 59.02%,76.16% and 81.29% respectively,and the CV was 1.52%-5.89% when added 0.4 μg/g.This method was efficient,stable and specific.It could be used for the detection and quantification of DOX in different types of soil,which was helpful for the establishment of the detection method of DOX in the environment.

Key words: soil; doxycycline; solid phase extraction; high performance liquid chromatography; ultraviolet

CLC Number: