Optimization of Methodology for Determination of Inorganic Chromium Species in Sewage Sludge Samples by HPLC-ICP-MS/MS

Atomic Spectrometry Update: review of advances in elemental speciation

“…A methodology for determining inorganic Cr species in sewage sludge by HPLC-ICP-MS/MS, involved optimisation of the extraction procedure (for which FAAS was used). 88 The researchers investigated the effects of MAE, vortex mixing and UAE, for a variety of times and at various temperatures and finally chose a procedure that involved a “shaking water bath at 100 rpm” at 50 °C for 16 h, in which 0.2 g of sample was extracted with 5 mL of 50 mmol L −1 EDTA at pH 9.5. The final volume was 25 mL, and the sample was diluted 10-fold before HPLC injection.…”