Journal Highlight: Determination of trace nickel in hydrogenated cottonseed oil by ETAAS after microwave-assisted digestion

Skip to Navigation

Ezine

  • Published: Jan 9, 2012
  • Channels: Atomic
thumbnail image: Journal Highlight: Determination of trace nickel in hydrogenated cottonseed oil by ETAAS after microwave-assisted digestion

Determination of trace nickel in hydrogenated cottonseed oil by electrothermal atomic absorption spectrometry after microwave-assisted digestion

Journal of Food Science 2012, 77, T41-T43
Gai Zhang

Abstract: Microwave digestion of hydrogenated cottonseed oil prior to trace nickel determination by electrothermal atomic absorption spectrometry (ETAAS) is proposed here for the first time. Currently, the methods outlined in U.S. Pharmacopeia 28 (USP28) or British Pharmacopeia (BP2003) are recommended as the official methods for analyzing nickel in hydrogenated cottonseed oil. With these methods the samples may be pre-treated by a silica or a platinum crucible. However, the samples were easily tarnished during sample pretreatment when using a silica crucible. In contrast, when using a platinum crucible, hydrogenated cottonseed oil acting as a reducing material may react with the platinum and destroy the crucible. The proposed microwave-assisted digestion avoided tarnishing of sample in the process of sample pretreatment and also reduced the cycle of analysis. The programs of microwave digestion and the parameters of ETAAS were optimized. The accuracy of the proposed method was investigated by analyzing real samples. The results were compared with the ones by pressurized-PTFE-bomb acid digestion and ones obtained by the U.S. Pharmacopeia 28 (USP28) method. The new method involves a relatively rapid matrix destruction technique compared with other present methods for the quantification of metals in oil.

  • This paper is free to view to spectroscopyNOW registered users until the end of March 2012. After this time it will be available via Wiley's Pay-Per-View service for US$29.95.
  • Click here to access the abstract of this paper. From here you can progress to read the full paper.
  • Click here for more details about Journal of Food Science

 

 A combination of microwave digestion and electrothermal atomic absorption spectrometry is proposed for the first time for the determination of trace nickel in hydrogenated cottonseed oil

 Photo: ARS/USDA, Peggy Greb

Social Links

Share This Links

Bookmark and Share

Microsites

Suppliers Selection
Societies Selection

Banner Ad

Click here to see
all job opportunities

Copyright Information

Interested in separation science? Visit our sister site separationsNOW.com

Copyright © 2017 John Wiley & Sons, Inc. All Rights Reserved