Ion chromatograph and its sampling method

Abstract

The invention provides an ion chromatograph and a sample introduction method. The ion chromatograph includes a main body and a sample introduction needle connected to the main body. The sample introduction needle comprises a needle tube, an ultrasonic sheet arranged on the surface of the tube wall of the needle tube and a metal film arranged on the surface of the ultrasonic sheet. In a hydrogen peroxide sample introduction process, through metal film catalytic hydrogen peroxide decomposition, water and oxygen are produced. The ultrasonic sheet continuously provides ultrasonic vibration to thehydrogen peroxide to produce a solution degassing function, to remove oxygen produced by the decomposition of hydrogen peroxide and to reduce the oxygen concentration of the hydrogen peroxide to the absolute safety level and the stable test performance range of the ion chromatograph detection and thus the in the hydrogen peroxide sample introduction process, the system pipe in the ion chromatograph is not oxidized, the ion chromatograph blocking caused by oxygen in the chromatograph is prevented, the stability and sensitivity of detection are improved, and the quality of the raw materials andthe consistency of processes such as production and monitoring are guaranteed.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an ion chromatograph and a sampling method thereof. Background technique [0002] With the development of display technology, liquid crystal display (Liquid Crystal Display, LCD) has gradually replaced cathode ray tube (Cathode Ray Tube, CRT) display due to its advantages of high image quality, power saving, thin body and wide application range. , are widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of display devices. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module (Backlight Module). The working principle of the liquid crystal display panel is to pour liquid crystal molecules between the thin film t...

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Problems solved by technology

[0005] Existing anion testing methods in solution mainly rely on titration analysis, potentiometric analysis and other methods, but there are limitations such as poor detection limit, cumbersome operation, and indistinguishable interference, while ion chromatography can better avoid these problems. problems, the detection limit can be better guaranteed, each ion peak type can be better separated, and the operation is very convenient

However, the use of ion chromatography to test anions in hydrogen peroxide will face several problems: 1. The hydrogen peroxide oxidation system pipeline in the ion chromatograph will make the ion chromatography column oxidatively invalid; 2. The hydrogen peroxide decomposes in the system pipeline to generate oxygen blocking ions The chromatographic column increases the pressure of the system and the test effect deviates

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