Patent ID: 7165444
Filing Date: 2007-01-23
Classification: B01D,B01J,G01N

Abstract:
1. A concentrating column useful for elemental analysis of trace metals, comprising a column body, filtration membranes fixed at the fluid inlet end and the outlet end of the column body, and column packing packed inside the column body, the column packing is prepared from a swollen and cleaned macroporous adsorbent resin of high, medium or non-polarity treated with a mixture of 3 mol/L NH 4 OH-1 mol/L HAC-3.0˜6.0×10 −4 mol/L pyridin-(2-azo-4-)resorcin or a mixture of 0.5 mol/L Na 2 HPO 4 -1.0˜2.0×10 −4 mol/L pyridin-(2-azo-4-)resorcin.