High-performance ion mobility spectrometry with direct electrospray ionization (ESI-HPIMS) for the detection of additives and contaminants in food
Analytica Chimica Acta, ISSN: 0003-2670, Vol: 804, Page: 197-206
2013
- 42Citations
- 43Captures
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Metrics Details
- Citations42
- Citation Indexes42
- 42
- CrossRef27
- Captures43
- Readers43
- 43
Article Description
High-performance ion mobility spectrometry (HPIMS) with an electrospray ionization (ESI) source detected a series of food contaminants and additive compounds identified as critical to monitoring the safety of food samples. These compounds included twelve phthalate plasticizers, legal and illegal food and cosmetic dyes, and artificial sweeteners that were all denoted as detection priorities. HPIMS separated and detected the range of compounds with a resolving power better than 60 in both positive and negative ion modes, comparable to the commonly used high-performance liquid chromatography (HPLC) methods, but with most acquisition times under a minute. The reduced mobilities, K 0, have been determined, as have the linear response ranges for ESI-HPIMS, which are 1.5–2 orders of magnitude for concentrations down to sub-ng μL −1 levels. At least one unique mobility peak was seen for two subsets of the phthalates grouped by the country where they were banned. Furthermore, ESI-HPIMS successfully detected low nanogram levels of a phthalate at up to 30 times lower concentration than international detection levels in both a cola matrix and a soy-based bubble tea beverage using only a simplified sample treatment. A newly developed direct ESI source (Directspray) was combined with HPIMS to detect food-grade dyes and industrial dye adulterants, as well as the sweeteners sodium saccharin and sodium cyclamate, with the same good performance as with the phthalates. However, the Directspray method eliminated sources of carryover and decreased the time between sample runs. Limits-of-detection (LOD) for the analyte standards were estimated to be sub-ng μL −1 levels without extensive sample handling or preparation.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0003267013013020; http://dx.doi.org/10.1016/j.aca.2013.10.010; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84888028743&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/24267082; https://linkinghub.elsevier.com/retrieve/pii/S0003267013013020; https://dx.doi.org/10.1016/j.aca.2013.10.010
Elsevier BV
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