2018 Volume 49 Pages 241-248
Mapping analysis of cross section of pasta was carried using table type X-ray analytical microscope (Micro-XRF) and visualization of salt concentration distribution was displayed. Table type Micro-XRF has advantages that low tube voltage and current of the X-ray tube greatly minimize surface discoloration of samples including organic ones caused by X-ray irradiation, and can be easily handled in a laboratory.
Calibration curve of salt was created using boiled pasta which salt concentration was known. Pasta samples which salt concentratons were unknown were analysed and it was confirmed that the salt was permeating from the outside to the inside of the pasta. It was also possible to confirm the salt concentration distribution by performing quantification using a calibration curve. It also showed a positive correrarion with salt concentration obtained by the coulometric titration method. By using Micro-XRF, it was shown that the quantitative map image of elements in food can be confirmed nondestructively.
