Method for rapidly determining sulfur content in a plurality of samples
AssigneeE. I. Du Pont de Nemours and Company
InventorJONATHAN SAMUEL TSCHRITTER
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Abstract
Methods for measuring the sulfur content in a plurality of individual sulfur-containing fiber or article samples, comprising: a) contacting a plurality of samples with a solution comprising potassium hydroxide to convert the sulfur to potassium sulfate; b) concurrently and individually combusting the plurality of samples from step a) in a furnace at a temperature of greater than 650° C. to remove essentially all organic materials to produce a plurality of residues; c) dissolving each of the pluralities of residue in concentrated nitric acid to form individual residue solutions; and d) analyzing the individual residue solutions with Inductively Coupled Plasma (ICP) Emission Spectrometry to determine the sulfur content of each sample.
Claims4
A method of measuring the sulfur content in a plurality of individual sulfur-containing fiber or article samples, the method comprising the steps of:
- a) contacting a plurality of sulfur-containing fiber or article samples with an aqueous solution comprising potassium hydroxide to convert the sulfur to potassium sulfate;
- b) concurrently and individually combusting the plurality of samples from step a) in a furnace at a temperature of greater than 650° C. to remove essentially all organic materials and produce a plurality of residues;
- c) dissolving each of the pluralities of residue in concentrated nitric acid to form individual residue solutions;
- and
- d) analyzing the individual residue solutions with Inductively Coupled Plasma (ICP) Emission Spectrometry to determine the sulfur content of each sample.
Dependencies are inferred from the claim text.