ABSTRACT
A method was developed for the determination of four kinds of bisphenolic and halogenated bisphenolic compounds including bisphenol F, bisphenol A, tetrachlorobisphenol A, tetrabromobisphenol A in human urine using high performance liquid chromatography-tandem mass spectrometry. The analytes was extracted by solid phase extraction. The separation of the analytes was achieved on an Atlantis T3 column (3. 0×150 mm, 3 μm) gradient eluted with the mobile phase of acetonitrile and water at the rate of 250 μL/min, and detected by an electrospray ionization tandem mass spectrometry in the multiple-reaction-monitoring negative mode. The quantification was carried out by matrix-matched calibration curve. The average recoveries at 3 spiked levels were 86%-118%, with intra-day precision of 2 . 6%-17 . 0% and inter-day precision of 3. 2%-18. 0%. The limits of detection of four analytes (S/N=3) were 0. 01-0. 25 μg/L. The method was applied to the analysis of 200 human urines samples and the results showed that the method was simple, sensitive and reliable.
ABSTRACT
Objective To develop a high performance liquid chromatography (HPLC) method for the determination of nicotine in tobacco. Methods The nicotine was separated completely by C18 column (column temperature∶35℃ ), and was determined by PDA detector at wave length of 260 nm. Mobile phase was acetonitrile: 0.08 mmol/L KH2PO4 (V∶V= 1∶9) at the flow rate of 1.0 ml/min. Results The detection limits is 0.40 ?g/ml. The linear range was 0.00-60.0 ?g/ml. The recovery rates were 97.8%-103% and the relative standard deviations was 2.29% (n=5). Conclusion The method was simple, rapid, sensitive and accurate for the determination of nicotine.
ABSTRACT
0.992 7. The recovery rates were 80.0%-107% and the RSDs were between 0.16%-1.69%. Conclusion This method is simple, rapid, sensitive, accurate and is applicable to the simultaneous determination of carbonyl compounds in water.