Patent ID: 7939334
Filing Date: 2011-05-10
Classification: G01N,Y10T

Abstract:
1. A process for simultaneous assay of chlorides and sulfides by low pressure ion exclusion chromatography, wherein an analytic apparatus comprising a sample flow path, an eluent flow path, a developer flow path, a sampling valve, a sampling loop, an ion exclusion column and an analytic detection flow path is used, and the working pressure of said analytic apparatus is 2×10 5 -3×10 5 Pa, said analytic detection flow path includes a mixer, a reactor and an optical flow cell, said process comprises the following steps: (1) Eluent C flows through the eluent flow path, the sampling valve, the ion exclusion column and enters into the analytic detection flow path; developer R (2) a testing sample S flows into the sampling loop through the sample flow path and the sampling valve, and under the drive of Eluent C, flows into the ion exclusion column from the sampling loop, and enters into the analytic detection flow path through the ion exclusion column; developer R (3) a series of standard samples with known concentrations of chlorides and sulfides are used to replace the testing sample, and steps (1) and (2) are repeated so as to obtain a series of spectrograms of standard samples; (4) according to the spectrograms of the testing sample and the standard samples, the contents of chlorides and sulfides in the testing sample are calculated; wherein said Eluent C is an aqueous solution of sodium nitrate, said developer R