Double-channel full-automatic intelligent rapid mercury vapormeter

Abstract

A double-channel full-automatic intelligent rapid mercury vapormeter comprises an automatic sample introduction system, a double-channel system, an absorption cell system and a gas path system, wherein the automatic sample introduction system is connected with the double-channel system and used for inputting a sample boat containing a sample into the double-channel system through the automatic sample introduction system, the absorption cell system is connected with the double-channel system. The two-channel system pyrolyzes mercury in a sample into mercury elementary substance steam in a thermal cracking manner, the mercury elementary substance steam is input into the absorption cell system under the action of the gas path system, and the absorption cell system is used for detecting the absorbance of the mercury elementary substance steam in the absorption cell to a light intensity difference effect caused by characteristic spectral lines emitted by the mercury special light source. According to the double-channel full-automatic intelligent rapid mercury vapormeter, a double-channel sequential detection mode is utilized, and two sample results are measured at the same time through one-time testing, so that the sample testing time is greatly shortened, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the field of analytical chemistry, and mainly relates to a double-channel full-automatic intelligent rapid mercury measuring instrument. Background technique [0002] There are two main detection principles for rapid mercury detector detection: one is pyrolysis catalysis-gold amalgam-cold atomic absorption spectrometry; the other is pyrolysis-Zeman effect-cold atomic absorption spectrometry. Since the Zeeman effect has poor matrix anti-interference ability for samples with high organic matter, the former is the mainstream in the laboratory rapid mercury analyzer. [0003] Existing mercury measuring instruments mainly have the following disadvantages: [0004] a. The test time for a single sample is about 5-6 minutes, which makes the test efficiency of batch samples lower; [0005] b. The pyrolysis heating method is the traditional furnace wire heat radiation method, and the slow heating rate usually takes more than 2.5 minute...

AI Technical Summary

Problems solved by technology

[0007] d. When using imported similar products to test, the sample sampling volume is large, and a large amount of condensed water vapor makes the system unstable during the test process and affects the stability of the test results;

[0008] e. The carrier gas uses high-purity oxygen or purified air. When the gold amalgamation system releases mercury vapor into the absorption pool, a small part of mercury vapor atoms will inevitably combine with oxygen, thereby weakening the absorption effect and affecting the detection results to a certain extent. ;

[0009] f. The light sources for mercury detectors all have low-pressure mercury lamps, and it often takes a long time to warm up the light sources, which affects the detection efficiency;

[0010] g. The linear range is generally improved by double absorption pools, which makes the light source energy received by the absorption pools inconsistent; at the same time, the absorption pools are made of stainless steel alloy, which is easy to be contaminated when testing high organic matter samples, which greatly affects the detection results of ultra-trace mercury;

[0011] h. There is no remote control and real-time monitoring system. When no one is on duty, it is impossible to obtain data and monitor the operating status of the instrument in real time.

Images