With continuing food scares around the world, food producers need every tool they can get to prevent contamination of their products at every stage of production. Hyperspectral reflectance imaging in the NIR combined with chemometrics shows much promise for the detection and identification of foreign bodies among food grains.
This article describes an application of spectral imaging for the differentiation of tumour and normal cells. The authors also introduce the concept of a spectral barcode, which has had success with some tissues and has potential in others.
Sotiris Stasinos and Ioannis Zabetakis have used ICP-MS to investigate the cross-contamination of food crops by heavy metals in ground or irrigation water. They show that this can occur easily in certain crops, which has serious health consequences for those consuming the food crop. As a consequence of their work, the European Food Safety Authority (EFSA) has been informed about the accumulation of Cr and Ni in food tubers and is taking action.
Tony (A.M.C.) continues down the last furlong of his series of Tony Davies Column articles. This issue, he considers principal component analysis (PCA). Using research recently published in the Journal of Near Infrared Spectroscopy, he explains that PCA is a very useful tool but it will not solve all our problems. Two old articles on PCA, including Tony’s concept of the “Data Cake” have been added to the website, are referenced in Tony’s article and can be freely downloaded by readers.
There are a number of approaches, and by combining FT-IR imaging methodology with microfluidics devices, the opportunity to study live cells by FT-IR imaging in controlled environments is now possible.
In resonance Raman scattering (RRS), the amount of structural and chemical information deduced can be increased by analysing the polarisation of the inelastically scattered light, including the degree of molecular aggregation in bio-molecules in their natural environment.
The single cell Raman spectrum (SCRS) enables cell probing and sorting to study phenotypes and ecophysiology of single cells and explore individual cells in situ in a label-free and non-destructive manner.
Robert Lancashire reports from the Chemical Information Division (CINF) of the American Chemical Society meeting at their recent 246th ACS National Meeting and Exposition.
John Hammond reports on important developments at the ISO Committee on Reference Materials (ISO/REMCO) annual meeting.
- The use of liquid chromatography tandem mass spectrometry for the investigation of suspected (pesticide) poisoning of vertebrate animals and beneficial insects
- The last furlong (2) Data Compression by wavelets
- Detection of thiabendazole applied to organic fruit by near infrared surface-enhanced Raman spectroscopy
- Ultrafast screen for designer drugs in urine using high-throughput mass spectrometry
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- The impact of water pollution with chromium and nickel to the food chain
- Novel concepts in infrared spectral imaging as a cancer diagnostic tool
- Near infrared hyperspectral imaging for foreign body detection and identification in food processing
- Probing and sorting single cells—the application of a Raman-activated cell sorter
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Gujarathi Dipak B. saidSir,
This is an excellent appl... 1 year ago
Rakesh Kanda saidDr Alfonso,
Matrix suppression is ... 2 years ago
Dr Robson JCF Afonso saidDear Authors,
As you sad atmospheric... 2 years ago
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Based on this article ... 2 years ago
Dr Robson JCF Afonso saidI am glad to hearing someone question... 2 years ago
- Atomic absorption
- Atomic emission
- Ion mobility
- Laser spectroscopy
- Mass spectrometry
- Near infrared
- NMR ESR EPR
- Related equipment
- RMs and standards
- Sample prep
- Separation science
- Surface analysis
- X-ray spectrometry