Flame AA Analysis of Cadmium (Cd) and Lead (Pb) in Simulated Seawater and Polished Rice Using Chelating Polymer Solid Phase Extraction

The testing methods for industrial wastewater (JIS K 0102) as amended in 2013, newly adopt the use of solid phase extraction with a chelating resin for sample pretreatment of Cu, Zn, Pb, Cd, Fe, Ni, and Co. Using this process permits separation and concentration of the target elements from such interfering components as sodium, potassium, magnesium and calcium, etc. Solvent extraction using a chelating agent has conventionally been employed for the same purpose, but solid phase extraction using a chelating resin offers such benefits as reduced solvent consumption and pollution, and simplified processing.Here, using the AA-7000, we introduce examples of analysis by the flame method of Cd and Pb in simulated seawater and a solution of decomposed polished rice using commercially available chelating resin cartridges for solid phase extraction.