Simultaneous determination of eighteen steroid hormones in antler velvet by gas chromatography-tandem mass spectrometry.

A method for the simultaneous determination of eighteen steroid hormones, including 17α-ethinylestradiol, 17α-estradiol, 19-nortestosterone, estriol, testosterone, androsterone, 17β-estradiol, estrone, progesterone, 17α-hydroxyprogesterone, medroxyprogesterone, norethisterone acetate, testosterone 17-propionate, medroxyprogesterone-17-acetate, corticosterone, megestrol-17-acetate, chlromadinone-17-acetate and 17β-estradiol-benzoate, in antler velvet was developed by solid-phase extraction (SPE) and gas chromatography-tandem mass spectrometry (GC-MS/MS). Prior to the determination by GC-MS/MS, the analytes were derivatized with heptafluorobutyric acid anhydrides (HFBA). The recoveries were in the range of 62.

[Determination of alachlor residue in agricultural products].

A method of the determination of alachlor residue in agricultural products was developed. Four different kinds of objects, corn, peanut, spinach, and orange were selected as representatives of main agricultural products. The sample was extracted with acetone-water (8:2, v/v).