Concentrating column and sample processing device useful for elemental analysis of trace metals
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United States of America Patent
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Jan 23, 2007
Grant Date -
Feb 23, 2006
app pub date -
Aug 3, 2005
filing date -
Aug 3, 2004
priority date (Note) -
Expired
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Abstract
A concentrating column useful for elemental analysis of trace metals consists mainly of column body, filtration membranes 6 fixed at the fluid inlet end and the outlet end of the column body, and column packing 8 packed inside the column body, wherein column packing 8 is prepared from the swollen and cleaned macroporous adsorbent resin of high, medium or non-polarity treated with a mixture of 3 mol/L NH.sub.4OH-1 mol/L HAC-3.0.about.6.0.times.10.sup.-4 mol/L pyridin-(2-azo-4-)resorcin or a mixture of 0.5 mol/L Na.sub.2HPO.sub.4-1.0.about.2.0.times.10.sup.-4 mol/L pyridin-(2-azo-4-)resorcin by dynamic on-column treatment or static immersion treatment. Two types of sample processing devices useful for elemental analysis of trace metals are provided with concentrating column employing the above-mentioned column packing. The concentrating column of the present invention simplifies the sample processing flow and the structure of sample processing device, saves chemical reagent, increases sample processing rate, and particularly prevents the toxic methanol from doing harm to the operator's health.
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