Polyurethane foams as sorbents for noble metals. Selective pre-concentration of small amounts of platinum from hydrochloric acid containing tin(II) chloride followed by flame atomic absorption analysis

Polyurethane foams in chemical analysis: sorption of various substances and its analytical applications

“…In some cases, determination is carried out after decomposition of the sorbent on treatment with mineral acids, for example, HNO 3 184 or its mixture with HCl. 44,54,192…”

“…The preconcentration of elements by sorption on PUF is often combined with determination in eluates by atomic-absorption spectroscopy (AAS) and atomic-emission spectroscopy with inductively coupled plasma (ICP AES). The flame AAS method was applied to determine platinum 44 and thallium 50 after preconcentration of the elements as halide complexes on PUF followed by desorption on treatment with acetone.…”