caa a22 4500 445801972 CHVBK 20180317145144.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10337-011-1924-7 doi (NATIONALLICENCE)springer-10.1007/s10337-011-1924-7 Tian Hongzhe Analysis and Testing Center, Shenyang Agricultural University, 120 Dongling Road, 110161, Shenyang, China aut Uncertainty Analysis of Chlormequat Residue in Fruits by LC-MS-MS [Elektronische Daten] [Hongzhe Tian] A method for determination of chlormequat (CCC) residue in fruits by liquid chromatography-tandem mass spectrometry (LC-MS-MS) was developed. Residue of CCC was extracted from samples with methanol-water (v/v, 1:1) containing 1.0% acetic acid, cleaned up by strong cationic exchange (SCX) cartridge, and then determined by LC-MS-MS. The method showed good linearity over the concentration range 0.002-5.0mgkg−1 with correlation coefficient above 0.997. The limit of detection (LOD) and limit of quantitation (LOQ) for CCC were 5×10−4 mgkg−1 (S/N=3) and 0.002mgkg−1 (S/N=10), respectively. Recoveries for CCC at three spiked levels (0.025, 0.050, and 0.20mgkg−1) were in the range 80-102%. Estimation of measurement uncertainty was calculated for CCC at the level of 0.025mgkg−1 in fruits. The results demonstrated that the uncertainty of recovery was the main contribution to the combined standard uncertainty. The relative combined standard uncertainties associated with the method ranged from 11 to 13%, depending on the sample matrices. Springer-Verlag, 2011 Liquid chromatography-tandem mass spectrometry nationallicence Chlormequat nationallicence Measurement uncertainty nationallicence Chromatographia Springer-Verlag 73/5-6(2011-03-01), 457-462 0009-5893 73:5-6<457 2011 73 10337 https://doi.org/10.1007/s10337-011-1924-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10337-011-1924-7 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tian Hongzhe Analysis and Testing Center, Shenyang Agricultural University, 120 Dongling Road, 110161, Shenyang, China aut NATIONALLICENCE 773 0- Chromatographia Springer-Verlag 73/5-6(2011-03-01), 457-462 0009-5893 73:5-6<457 2011 73 10337 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer