Food powder analysis by using transversely excited atmospheric CO2 laser-induced plasma spectroscopy

3rd International Conference on Science & Engineering in Mathematics, Chemistry and Physics 2015

数学;化学;物理学

Khumaeni, Ali^1 ; Lie, Zener Sukra^2 ; Setiabudi, Wahyu^1 ; Kurniawan, Koo Hendrik^2 ; Kagawa, Kiichiro^3

Department of Physics, Diponegoro University, Semarang, Indonesia^1

Maju Makmur Mandiri Research Center, Kembangan, Jakarta, Indonesia^2

Research Institute of Nuclear Engineering, University of Fukui, Fukui, Japan^3

关键词: Detection limits;    Food powders;    High temperature;    Luminous plasmas;    Metal surfaces;    Semi-quantitative analysis;    Sensitive analysis;    Strong shock waves;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/622/1/012057/pdf
DOI  :  10.1088/1742-6596/622/1/012057

来源: IOP

【 摘 要 】

A direct and sensitive analysis of food powder sample has successfully been carried out by utilizing the special characteristics of pulsed transversely excited atmospheric (TEA) CO2laser. In this study, a food powder was placed in a container made of copper plate and covered by a metal mesh. The container was perpendicularly attached on a metal surface. A high-temperature luminous plasma was induced on a metal surface 5 mm above the mesh. Once the plasma was produced, a strong shock wave was induced, blowing-off of the powder from the container to enter into the plasma to be dissociated and excited. By using this method, a semi-quantitative analysis of food powder was made. The detection limits of Cr in the powdered agar and Cd in the powdered rice were 9 mg/kg and 50 mg/kg, respectively.