Collection method and measurement method for alkali metals and compounds thereof in air in working place

A workplace and collection method technology, applied in the field of determination of alkali metals and their compounds in occupational health testing, to achieve high sampling efficiency, high stability, and simple operation

Active Publication Date: 2014-01-08
ZHEJIANG ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of workplace air testing, there are no ion chromatography detection methods related to lithium, sodium, potassium and their compounds, and the corresponding air sampling methods

Method used

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  • Collection method and measurement method for alkali metals and compounds thereof in air in working place
  • Collection method and measurement method for alkali metals and compounds thereof in air in working place

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Embodiment 1

[0043] The present embodiment analyzes and measures sodium hydroxide and potassium hydroxide in the workplace air.

[0044] 1. Instrument reagents used:

[0045] Dionex ICS-2100 ion chromatograph (Thermo, USA), conductivity detector, CSRS self-regenerating cation suppressor, Chromeleon6.5 chromatographic workstation, Simplicity pure water system (Millipore, USA), nitrogen cylinder, deionized water storage tank, Impact absorption tube (specification: the interface between the inlet pipe and the outlet pipe should be a standard grinding mouth, the inlet pipe should be perpendicular to the bottom of the pipe, the inner diameter of the pipe tip of the air inlet pipe is 1.0mm±0.1mm, and the distance between the pipe tip and the pipe bottom is 5.0mm±0.1 mm), air sampler (Zhejiang Hengda Instrument Co., Ltd., flow range: 0-5.0mL / min).

[0046] A sampling device for alkali metals and their compounds in the air in the workplace, including an impact absorption tube and a gas sampler. I...

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Abstract

The invention discloses a collection method for alkali metals and compounds thereof in air in a working place. The sampling can be finished by introducing the air in the working place into a sulfuric acid and methanesulfonic acid mixed aqueous solution which serves as an absorption medium. The collection method is simple, high in collection efficiency and high in absorption capacity. The invention also discloses a measurement method for the alkali metals and the compounds thereof in the air in the working place. The measurement method comprises the following steps of preparing a standard sequence of alkali metal ions; measuring a standard series, a sample and a blank reference solution through an ion chromatograph, drawing a standard curve, subtracting a response value measured by the sample into the standard curve to obtain the concentration of the alkali metal ions in the sample, and carrying out conversion to obtain the concentration of the alkali metals and the concentration of the compounds of the alkali metals in the air in the working place. According to the collection and measurement methods, various alkali metals and the compounds thereof can be simultaneously collected and measured through one-time sampling and under a chromatographic condition; the chromatographic measurement operation is simple; the stability is high; a result is reliable.

Description

technical field [0001] The invention relates to the field of determination of alkali metals and their compounds in occupational health testing, in particular to a method for collecting and measuring alkali metals and their compounds in the air of a workplace. Background technique [0002] Alkali metals and their compounds are widely used in industrial and agricultural production, medicine and chemical industry. Alkali metals lithium, sodium, and potassium are very active in chemical properties and can react with various substances, and usually exist in the air in the form of metal compounds such as hydroxides. These substances are white crystals at normal temperature and are highly irritating and corrosive. Inhalation of dust or mist of alkali metals and their compounds can cause chemical upper respiratory inflammation. GBZ2.12007 "Occupational Exposure Limits of Hazardous Factors in the Workplace Part 1: Chemical Hazardous Factors" clearly stipulates that the time-weighte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N1/22
Inventor 朱海豹钱亚玲唐红芳阮征刘丹华王晗
Owner ZHEJIANG ACAD OF MEDICAL SCI
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