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Detection method for measuring organic amine in ambient air and waste gas

A technology for ambient air and detection methods, applied in the detection of diethylamine and triethylamine, the field of monoethylamine in ambient air and exhaust gas

Pending Publication Date: 2021-04-20
杭州中一检测研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The organic amine determination method in water has direct sampling method, headspace-gas chromatography etc., but lacks the detection method for ambient air and waste gas sample determination monoethylamine, diethylamine and triethylamine in the prior art, therefore, Lack of a detection method for determining the content of monoethylamine, diethylamine and triethylamine in ambient air and exhaust gas

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  • Detection method for measuring organic amine in ambient air and waste gas
  • Detection method for measuring organic amine in ambient air and waste gas
  • Detection method for measuring organic amine in ambient air and waste gas

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Embodiment 1

[0051] see Figure 1-7 , the present invention provides a technical solution: a detection method for measuring organic amines in ambient air and waste gas, comprising the following steps:

[0052] S1. Sample collection:

[0053] Air samples: Ambient air samples and air samples from fugitive emission monitoring points from fixed pollution sources are adsorbed by silica gel tubes at the sampling points, and samples are collected with an air sampler at a flow rate of 500ml / min for 15 minutes, with a sampling volume of 7.5L;

[0054] Exhaust gas sample: The exhaust gas sample from a fixed pollution source is adsorbed by a silica gel tube at the sampling point, and the sample is collected by a flue gas sampler at a flow rate of 500ml / min for 10 minutes, and the sampling volume is 5.0L;

[0055] Blank sample: At the sampling point, open both ends of the silicone tube and seal it immediately to get a blank sample;

[0056] Among them, the silicone tube is a solvent analysis type, a...

Embodiment 2

[0098] Specifically, such as Figure 8 As shown, in step S2, a mixed standard solution with a concentration of 1.0mg / L was prepared for sample analysis, and other conditions of the headspace sampler were fixed, namely "headspace equilibration time: 1min; transfer line temperature: 105°C; sample injection Needle temperature: 100°C; Heating equilibrium time: 30min; Injection time: 0.5min; Injection volume: 1mL" unchanged, investigate the peaks of triethylamine when the heating equilibrium temperature is 55, 65, 75, 85 and 95°C respectively area change;

[0099] When the temperature rises, the Henry's constant will become larger, and the distribution coefficient of triethylamine in the gas-liquid terms will be changed. When the heating equilibrium temperature is rising, the peak area of ​​triethylamine will gradually increase, but as the equilibrium temperature increases At the same time, it will lead to an increase in the pressure of the headspace bottle. Excessive pressure wil...

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Abstract

The invention discloses a detection method for determining organic amine in ambient air and waste gas. The detection method comprises the following steps: S1, collecting a sample; S2, adopting an experimental instrument under experimental conditions; S3, treating the sample; and S4, establishing a working curve: preparing a standard sample curve according to the sample treatment process in the step S3, introducing samples according to the sequence of concentrations from low to high, and establishing the working curve by taking the concentration mg / L of the standard series as an abscissa and the corresponding chromatographic peak area as an ordinate. According to the invention, the detection limits of monoethylamine, diethylamine and triethylamine in ambient air are 0.1 mg / m<3>, 0.2 mg / m<3> and 0.2 mg / m<3> respectively, the detection limits of monoethylamine, diethylamine and triethylamine in stationary pollution source waste gas are 0.2 mg / m<3>, 0.3 mg / m<3> and 0.3 mg / m<3> respectively, the adding standard recovery ranges of the samples are respectively 82.5%-116%, 85.3%-131% and 72.0%-121%, and the relative standard deviations are respectively 13.5%, 16.3% and 21.7%; and the method is low in detection limit, convenient to operate, reliable in accuracy and precision, and the like.

Description

technical field [0001] The invention relates to the technical field of detection of monoethylamine, diethylamine and triethylamine in ambient air and waste gas, in particular to a detection method for measuring organic amines in ambient air and waste gas. Background technique [0002] Monoethylamine, diethylamine and triethylamine belong to organic amines. They are irritating gases with a strong ammonia smell. They are slightly soluble in water and have boiling points of 16.6°C, 55.5°C and 89.5°C respectively. Synthetic fibers and resins, insecticides, organic dyes, vitamin-enhanced feed, plant growth regulators, and pharmaceutical preparations are used as raw materials or intermediate products. Because of their low boiling points, monoethylamine and diethylamine are extremely volatile and easy to damage the surrounding environment. Cause pollution and affect human health. The three are highly toxic and highly active. Therefore, the analysis and determination of monoethylami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCY02A50/20
Inventor 王瑞方帆张琦琦翁咪娜王言伟包苏英詹夏强
Owner 杭州中一检测研究院有限公司