Detection method of chlorine-containing durable organic compounds in electronic information products
A detection method and electronic information technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve good precision, high recovery rate, and meet the detection requirements
Inactive Publication Date: 2017-01-11
PONY TESTING INT GRP SHANGHAI CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] At present, there are no standards for the detection of chlorine-containing persistent organic pollutants in electronic information products and their accessories. The applicant relies on years of testing experience and solid technical foundation, and through analysis and research on a large number of samples, developed a A set of detection technology solutions to detect and analyze various chlorine-containing persistent organic pollutants in electronic information products
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0025] (1) Sample pretreatment: The mobile phone casing sample is frozen by liquid nitrogen, pulverized by a high-speed pulverizer, and 20 g of the pulverized sample is accurately weighed, placed in a Soxhlet extraction tube, and acetone-dichloromethane is added to a 250 mL round bottom flask Solution (8+2) 100mL, Soxhlet extraction for 4h, filter the sample and extract in a 250mL rotary evaporator, wash the residue with 50mL acetone-dichloromethane solution (8+2) for 3 times, combine the extract and washing solution, Concentrate under reduced pressure on a 40°C water bath on a rotary evaporator to 1-2 mL. Add 2ml of toluene-acetonitrile (1+3) to redissolve the concentrated solution, and transfer it to a PC / NH2-SPE column pre-activated with 5mL of toluene-acetonitrile. Wash the bottle twice with 5ml of toluene-acetonitrile solution, and transfer the washing solution to the SPE column. The SPE column was eluted with 10ml of toluene-acetonitrile solution, and all the effluent w...
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
Login to View More Abstract
The invention relates to a detection method of chlorine-containing durable organic compounds in electronic information products, particularly a detection method of 16 chlorine-containing durable organic compounds (alpha-benzene hexachloride, beta-benzene hexachloride, gamma-benzene hexachloride, delta-benzene hexachloride, P,P'-DDE, P,P'-DDD, O,P'-DDT, P,P'-DDT, aldrin, oxy-chlordane, trans-chlordane, cis-chlordane, dieldrin, endrin, heptachlor and mirex) in electronic information products. The method comprises the following steps: taking a uniformly pulverized sample, adding an acetone-dichloromethane solution to perform Soxhlet extraction, washing the residues with an acetone-dichloromethane solution (8+2), merging the extracting solution and the washing solution, carrying out rotary evaporation concentration, adding a methylbenzene-acetonitrile solution for redissolution, passing through a methylbenzene-acetonitrile-activated PC / NH2-SPE (solid phase extraction) column for purification, eluting the SPE column with a methylbenzene-acetonitrile solution, concentrating the eluate under reduced pressure to a nearly dry state, adding n-hexane-acetone (1+1) for redissolution to a given volume, and analyzing on a GC-ECD (gas chromatography-electron capture detector). The method has the advantages of high sensitivity, high recovery rate and favorable precision.
Description
[0001] 【Technical field】 [0002] The invention belongs to the technical field of detection of toxic and harmful substances in electronic products, and in particular relates to a detection method for chlorine-containing persistent organic compounds in electronic information products. [0003] 【technical background】 [0004] Persistent Organic Pollutants (POPs) refer to chemical substances synthesized by humans that can persist in the environment, accumulate through the biological food chain (web), and cause harmful effects on human health. It has four characteristics: high toxicity, persistence, bioaccumulation, and long-distance migration, and humans at the top of the biological chain have amplified these toxicity to 70,000 times. [0005] Persistent organic pollutants are generally highly toxic, persistent, accumulative, and highly mobile. Persistent organic pollutants can also cause harm to organisms at low concentrations. They are resistant to photolysis, chemical decompos...
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
Login to View More IPC IPC(8): G01N30/88
Inventor 宋薇张昌豹曹佳
Owner PONY TESTING INT GRP SHANGHAI CO LTD