Chemical extraction of metals from organic matrices

3 Chemical Extraction of Metals from Organic Matrices 

Chemical separation for preparing samples for ICP-AES analysis is an excellent technique to use for samples containing major and trace concentrations, and there are several reasons for doing this. Three of the most important are  

APDC can complex up to 25 elements at pH range from 0 to 14 and its main advantage is the ease with which a single extraction can achieve almost 100% recovery. Malissa and Schoffmann [3] devised a list of elements that can be extracted and their best pH, which is shown in Table 3.2. The structure of APDC is  

The advantage of using APDC is the metal salts are readily soluble in most organic solvents and will separate them from high concentrations of other solutes that could cause difficulties in nebulisation and atomisation. Large bulk of aqueous sample may be extracted efficiently into a smaller volume of an organic solvent and this can be further 

Metal Nominal pH pH range (approx.) Metal Nominal pH pH range (approx.) 

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