Sampling device and method for effectively collecting nano plastic in air

A technology of nano-plastics and sampling devices, which is applied in the direction of sampling devices, measuring devices, material separation, etc., can solve the problems of nano-plastic exposure, hindering scientific evaluation of health risks, etc., and achieve large gas-liquid interface area, low cost, and small bubble diameter Effect

Inactive Publication Date: 2021-09-03
NANKAI UNIV
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Problems solved by technology

Nanoplastics in the air may enter the human body through respiration, exposure to nanoplastics, and related health risks
However, there is curre...

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  • Sampling device and method for effectively collecting nano plastic in air

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Embodiment 1

[0024] The present invention proposes a sampling apparatus required for quantitative detection of nanoplastic contamination in air, including a peristaltic pump, a glass rotor flowmeter, a Meng's gas washing bottle, a mixed gas liquid, and a microporous pure titanium exposure head five parts. It can effectively collect nano-plastic particles in the air. Indoor air samples are collected in a college student dormitory in Tianjin, the total amount of gas collected is 0.5m. 3 . The implementation steps are as follows:

[0025] One end of the creep pump hose collects air, the other ends into the glass rotor flow meter, the gas is from the upper and tapered glass tubes, and the sampling flow rate is set to 100 mL / min. The collected indoor air is continuously entered into six series of Meng's gas washing bottles along the peristaltic pump hose. The washed bottles are equipped with pure water and a mixed solution of dichloromethane, a volume ratio of 1: 9, a total of 250 mL. At the bott...

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Abstract

The invention provides a sampling device and method for effectively collecting nano plastic in air. The sampling device consists of five parts, namely a peristaltic pump, a glass rotor flow meter, a Montella gas washing bottle group, mixed gas washing liquid and a microporous pure titanium aeration head; during sampling, gas in the environment is collected by one end of a hose of a peristaltic pump, the other end of the hose of the peristaltic pump is connected into a glass rotameter, the sampling flow rate is corrected to be 0-1000mL/min through the flow meter, and the collected air enters a Montella gas washing bottle group along the hose and is continuously absorbed by mixed gas washing liquid, so that the last group of gas washing liquid is not detected by nano plastic. After the sample is collected, the quantitative analysis of the nano plastic in the air is realized by virtue of an alkali-assisted thermal depolymerization-liquid chromatography-mass spectrometry technology.

Description

Technical field [0001] The present application belongs to the field of air sampling, and more particularly to a sampling method and apparatus required for quantitative detection of nano-plastic contamination in the air. Background technique [0002] Human activities have made a large amount of abandoned plastic remain in the environment, which is difficult to recover to cause pollution to the ecological environment, and plastic pollution in environmental media is very serious. These discarded plastics decompose a more small particle diameter of less than 100 nm under a long-term environment (such as mechanical decomposition, photoxidation degradation and biodegradation, etc.). Due to small size, large surface energy, environmental durability, penetrating the possibility of biofilm, and may have a more severe toxic effect in biological enrichment. The nanoplastics in the air may enter the human body by breathing, and the exposure of nano-plastic is generated, resulting in related ...

Claims

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Application Information

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IPC IPC(8): G01N1/24G01N30/88
CPCG01N1/24G01N30/88
Inventor 汪磊张晓菲唐雪娇刘春光孙红文
Owner NANKAI UNIV
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