PMID- 24822448 OWN - NLM STAT- MEDLINE DCOM- 20150901 LR - 20190923 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 32 IP - 2 DP - 2014 Feb TI - [Simultaneous determination of 16 organic acids in feed additives by on-line enrichment and ion chromatography-mass spectrometry]. PG - 145-50 AB - A novel analytical method for simultaneous determination of sixteen organic acids by on-line enrichment and ion chromatography-mass spectrometry (IC-MS) was developed. Online enrichment and separation of the organic acids were performed by ion chromatography on a homemade enrichment column and a homemade separation column. The qualitative and quantitative analyses of the organic acids were performed by mass spectrometry in selected ion monitoring (SIM) mode on the basis of atmospheric pressure chemical ionization (APCI) source in negative mode. The sample of 200 microL was injected for the analysis, and the on-line enrichment time was 3 min. The sodium hydroxide solution was used as a gradient elution system. The two columns made it possible to have a low limit of detection due to the good enrichment and separation capability. The sixteen organic acids were separated completely within 30 min. All curves showed good linearity within the test concentration ranges. The limits of detection (LODs) were between 0.01 and 0.22 mg/L, and the average recoveries were between 70.6% and 110.8%. The relative standard deviations (RSDs) were less than 6.3%. The results indicate that this method is simple, rapid, sensitive and accurate for the determination of the organic acids in feed additives. FAU - Xiong, Zhiyu AU - Xiong Z FAU - Dong, Ying AU - Dong Y FAU - Zhou, Hongbin AU - Zhou H FAU - Yu, Yang AU - Yu Y FAU - Li, Jing AU - Li J FAU - Sun, Li AU - Sun L LA - chi PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Acids) RN - 0 (Organic Chemicals) SB - IM MH - Acids/*analysis MH - Animal Feed/*analysis MH - Atmospheric Pressure MH - Chromatography MH - *Chromatography, High Pressure Liquid MH - Limit of Detection MH - *Mass Spectrometry MH - Organic Chemicals MH - Spectrum Analysis EDAT- 2014/05/16 06:00 MHDA- 2015/09/02 06:00 CRDT- 2014/05/15 06:00 PHST- 2014/05/15 06:00 [entrez] PHST- 2014/05/16 06:00 [pubmed] PHST- 2015/09/02 06:00 [medline] AID - 10.3724/sp.j.1123.2013.10003 [doi] PST - ppublish SO - Se Pu. 2014 Feb;32(2):145-50. doi: 10.3724/sp.j.1123.2013.10003.