mass spectrometry (4)

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Global demand for soyabeans has increase dramatically especially over the past 30 years, which has led to concerns about lower-than-expected product quality, adulteration, illegal trade, and deforestation. Therefore, development of effective analytical regimes to determine geographical origin and hence traceability, have become a priority. This is the first review that investigates current analytical techniques coupled with multivariate analysis for determining the geographical origin of soybeans. The 10 analytical techniques in 3 main groups outlined above are assessed, compared, and discussed in terms of their operating specifics, advantages, and shortcomings. The contribution of chemometrics in in analysing complex data is also covered. Each of these methods has advantages and disadvantages of its own. For example, the major drawback of geochemical techniques is their instrumental and operational costs, which can be mitigated by spectroscopic methods at the expense of sensitivity. Gaps in application of some analytical techniques are also identified. 

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This open access paper provides a comprehensive review of the definition and composition of honey, the different types of adulteration, common sugar adulterants, and detection methods of honey adulteration. It also discusses some of adverse health aspects of honey adulteration. 

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Spanish authors have published a chapter in a new book - "Mass Spectrometry - Future Perceptions and Applications", reviewing the use of LC-MS (Liquid Chromatography- Mass Spectrometry) in a wide number of authenticity applications. The chapter discusses the use in targeted analysis with or without chemometrics for identifying polyphenols to authenticate different fruits, vegetables and honey. It also reviews the use of LC-HRMS (High Resolution Mass Spectrometry) with chemometrics in targeted applications identifying biomarkers in saffron, fruits, cocoa beans, spices and rice. Non-targeted LC-MS applications for metabolomics in a wide range of foods are also covered.

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This paper gives a review of the current and potential applications of ambient ionisation mass spectrometry in determining the authenticity of food. Ambient mass spectrometry (based on electrospray ionisation mass spectrometry) has developed rapidly in the past 18 years and covers thirty different techniques. The review reports the authentication of many foods including olive oil, dairy products, coffee, meat and fish, but quantification using ambient mass spectrometry is still an issue and requires further work. 

Read the full article at: http://www.sciencedirect.com/science/article/pii/S0165993616301017

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