Abstract
The rapid determination of cadmium in solid rice and wheat samples was carried out using plasma jet spectroscopy. This technology is based on the atomic emission spectrometry (AES) with a plasma jet (PJ-AES). The performance of PJ-AES for the determination of Cd in rice and wheat samples was systematically investigated, including the linear range and sensitivity. The linear regression relationships for Cd in rice and wheat were y = 7659.496x + 4933.642 with R 2 = 0.987 and y = 10844.734x + 7815.255 with R2 = 0.984, respectively. The linear range was from 0.03 to 1.28 mg/kg. The detection limits were 0.0071 and 0.0078 mg/kg. This method has the advantages of speed, which is reflected in its sample preparation time of only 7.5 min, while the preparation times for AAS and ICP-MS are 3 and 2 h. The developed method offers simple sample processing, small size, low cost, and accurate analysis, while being economical and efficient.
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