Unlock instant, AI-driven research and patent intelligence for your innovation.

Rapid mercury measurement method

A measurement method and fast technology, applied in the environmental field, can solve the problems of not being able to observe mercury pollution in time, and the time-consuming sampling and analysis, so as to avoid the problem of data lag and realize the effect of direct detection

Pending Publication Date: 2022-05-27
XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quantitative analysis of Hg by ICP-MS has certain positive and negative deviations and shows memory effects
[0003] The off-line mercury measurement method can only get the average value for a period of time, and the mercury pollution cannot be observed in time, and the sampling and analysis takes a long time, so it is very necessary to realize the rapid measurement of flue gas mercury

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rapid mercury measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] A method for rapid measurement of mercury, comprising the following steps:

[0018] S1, use gold to capture mercury in flue gas, mercury and gold form gold amalgam, and achieve no less than 0.01μg / m2 in flue gas 3 separation and enrichment of mercury concentrations;

[0019] S2, heating the gold amalgam to 850-1000°C for 0.1-1 minute to release the enriched mercury;

[0020] S3, the mercury-enriched gas is sent into the ion mobility spectrometry detection unit through the carrier gas, the flow rate of the carrier gas is 0.1-2 L / min, chloroform is added as a dopant, and the ion mobility spectrometry detection unit is adjusted to the CD-IMS negative mode The mercury in the flue gas is detected, and the peak value at the drift time of 7.55ms is HgCl - , HgCl - Peak relative to Cl - The relative drift time of the peak was 1.52. The temperature of the drift gas i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a rapid mercury measurement method, which is based on an ion mobility spectrometry detection unit, mercury-enriched gas is introduced for detection, and chloroform is added as a dopant, so that rapid mercury measurement can be realized, the problem of data hysteresis is avoided, and a scientific basis is provided for monitoring and controlling mercury pollution. Moreover, many volatile organic compounds, such as alcohols, amines, aldehydes, ketones and alkanes, are not ionized in a CD-IMS negative mode, so that the compounds do not interfere with the detection of Hg. By means of the gold amalgam, effective separation of complex matrixes and to-be-analyzed elements in the flue gas is achieved, and direct detection of low-concentration mercury in the flue gas is achieved.

Description

technical field [0001] The invention belongs to the field of environment, and in particular relates to a quick measurement method of mercury. Background technique [0002] Atomic absorption spectroscopy (AAS) and cold vapor atomic absorption spectroscopy (CV-AAS) are the main techniques used to detect and measure mercury in environmental samples. Cold Vapor Atomic Fluorescence Spectroscopy (CV-AFS) is also widely used to analyze mercury content in different samples such as water, food, fish and seafood, soil and ash. However, these techniques require multi-step preconcentration and sample preparation methods to achieve trace mercury determination in complex samples. Inductively coupled plasma mass spectrometry (ICP-MS), as a rapid method, has been increasingly used for the detection and measurement of mercury. However, there is a certain positive and negative deviation in the quantitative analysis of Hg by ICP-MS, and it shows a memory effect. [0003] The offline mercury...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/622G01N1/40G01N1/44
CPCG01N27/622G01N1/40G01N1/44Y02P10/20
Inventor 谭增强齐全牛拥军李帅英蒙毅
Owner XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD