Journal
ANALYTICAL LETTERS
Volume 52, Issue 6, Pages 932-947Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032719.2018.1508293
Keywords
Chili powder; inductively coupled plasma-mass spectrometry (ICP-MS); inductively coupled plasma-optical emission spectroscopy (ICP-OES); linear discriminant analysis (LDA); near-infrared spectroscopy (NIRS)
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Funding
- World Institute of Kimchi, Republic of Korea [KE1701-5]
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This study investigated the content of macronutrients (Ca, K, Mg, Na, P, and S), trace elements (Ba, Be, Co, Cr, Cu, Fe, Ga, Li, Mn, Ni, Rb, Se, Sr, V, and Zn), and trace toxic elements (As, Cd, In, Pb, and Tl) in chili powder from Korea, China, and Vietnam. For the analyses, inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma-optical emission spectroscopy (ICP-OES) were used. In addition, near-infrared (NIR) spectroscopy was used to differentiate functional groups based on the chemical constituents. For the validation of the applied analytical methods, good linearity (coefficients of determination, 0.9443-0.99997), and relative standard deviations below 4% were obtained. The contents of the toxic elements were below the provisional tolerable weekly intake values. Linear discriminant analysis using elemental contents and NIR data was performed to establish and authenticate the geographical origin of chili powder, which confirmed the reliability of the obtained results.
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