Micro-sampling method

A microextraction procedure was established for the speciation of total Cr, Cr(III), and Cr(VI). Sudan blue II was used as a ligand for speciation works. Some factors affecting the recoveries of chromium species, including type of extraction and dispersive solvents, pH, ligand amount, extraction time, and matrix ions, were examined. Optimum values for the dispersive liquid–liquid microextraction method were pH 6, LOD 0.34 µg L−1 , and preconcentration factor 400.

9p langthannam 29-12-2021 12 0   Download

It is no surprise to see the micro-Raman Group at Lille come forth with this timely publication to document the present state of Raman microscopy. A quarter century has passed since the early attempts at Raman microsampling when the field began to merge with, and complement, other microprobe techniques. In the late 1960s to the early '70s, it was mainly the electron beam methods that opened up the microscopic domain to instrumental analysis, aside from classical light microscopy.

471p waduroi 03-11-2012 242 4   Download