Analyzing device and method for total organic carbon (TOC) content in water sample

Abstract

The invention provides an analyzing device and method for the total organic carbon (TOC) content in a water sample. Through illumination of UV light and catalysis of a catalyst, oxygen and the water sample react to generate hydrogen and oxygen free radicals, organic matter in the water sample is oxidized through the hydrogen and oxygen free radicals, and thus the TOC content in the water sample isaccurately analyzed.

Description

technical field [0001] The present invention relates to an analysis device and an analysis method thereof, more specifically, an analysis device and an analysis method thereof capable of analyzing the total organic carbon content of a water sample. Background technique [0002] As people pay more attention to the environment, governments of various countries regulate the Total Organic Carbon (TOC) content of water samples such as sewage and wastewater to reduce the pollution of sewage and wastewater to the environment. Therefore, the industry's total organic carbon analysis equipment is used Widely used for the analysis of total organic carbon in water samples. The total organic carbon analysis equipment usually oxidizes the organic matter in the water sample, and uses the Non-Dispersion Infrared Analyzer (NDIR for short) to measure the total organic carbon concentration in the water sample. [0003] There are at least three methods for oxidizing organic matter in water sam...

AI Technical Summary

Problems solved by technology

For the high-temperature combustion method, the organic matter in the water sample is generally oxidized on the high-temperature furnace wall, but this will lead to residual substances on the high-temperature furnace wall, and the resulting cleaning difficulties have been criticized by people.

For the UV persulfate method, the persulfate is generally activated by UV light to generate hydroxyl radicals, and the organic matter in the water sample is oxidized. However, when the chloride ion (Cl - ) concentration exceeds 0.5%, the generation of hydroxyl radicals will be inhibited, and when the turbidity of the water sample is high, the UV light may be blocked, so that the activation of persulfate is insufficient, so that the Organic matter cannot be completely oxidized, making the analysis of total organic carbon in water samples inaccurate

For the two-stage advanced oxidation method, the organic matter in the water sample is generally oxidized to carbon dioxide through the addition of alkali reagent (NaOH), and then the total organic carbon content in the water sample is analyzed by the measurement data of carbon dioxide. However, carbon dioxide is originally dissolved in alkaline reagents, so the use of alkaline reagents will have carbon dioxide that is not the oxidation of organic matter, which interferes with the analysis of total organic carbon content in water samples

Images