Analysis of substances which form volatile hydrides

Details Analysis of substances which form volatile hydrides Analysis of substances which form volatile hydrides

G - Physics

01

N

150/20

G01N 31/00 (2006.01) G01N 21/71 (2006.01) G01N 33/00 (2006.01)

Patent

CA 1195597

APPLICANT: BIFOK AB TITLE: ANALYSIS OF SUBSTANCES WHICH FORM VOLATILE HYDRIDES ABSTRACT OF THE DISCLOSURE Unsegmented, continuous flow analysis, FIA, has been modified for automated measurement of the amounts of metal and metalloids with volatile hydrides. The sample is injected into a continuous carrier flow of acid, and upon reaction with with sodium borhydride in a mixing coil, a gaseous hydride is generated which is blown with a gas flow to a detector, preferably an electrically heated quartz tube, and the atomic absorption is measured. The chemical interferences from other substances have been eliminated to a substantial degree by kinetic discrimination. Samples of about 1-100 nanograms can be determined at a rate of 180 samples per hour and with a detection limit in the sub-ng range.

402506

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