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Detecting method for pentachlorophenol in plastic component of electronic element
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A technology for electronic components and plastic parts is applied in the detection field of pentachlorophenol, which can solve the problem of rare detection of pentachlorophenol, and achieve the effect of simple detection method, good repeatability and reproducibility.
Inactive Publication Date: 2014-06-11
江阴泛函电气自动化有限公司
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[0004] At present, the detection method of pentachlorophenol is as GB8972-1988 " the mensuration gas chromatography of water quality pentachlorophenol " and GB9803-1988 " the mensuration saffron red T spectrophotometry of water quality pentachlorophenol ", and the object of detection mostly is water quality, for The detection of pentachlorophenol in plastic products is still rare
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Embodiment 1
[0056] (a) Weigh 2.0017 g of the sample linear diode plastic part with an electronic balance and cut it into 0.4*0.4cm-sized particles, and pour the sample particles into the Teflon microwave tube;
[0057] (b) Use a graduated cylinder to measure 30ml of solvent (hexane: acetone) = 1:1 (v / v) and pour it into a Teflon microwave tube for microwave extraction; after the microwave device is installed, turn on the power and press F1-Library to start To set parameters, use the up, down, left, and right keys to select a custom method for setting. The microwave extraction parameters are set to:
[0062] Under the above setting conditions, extract; after the solution extraction is completed, turn off the power after natural cooling, and release the pressure.
[0063] (c) Pour the solution into a clean lar...
Embodiment 2
[0072] (a) Weigh 2.0104g of the sample linear diode plastic part with an electronic balance and cut it into 0.3*0.5cm sized particles, and pour the sample particles into the Teflon microwave tube;
[0073] (b) Use a graduated cylinder to measure 15ml of solvent (hexane: acetone) = 1:5 (v / v) and pour it into a Teflon microwave tube for microwave extraction; after the microwave device is installed, turn on the power and press F1-Library to start To set parameters, use the up, down, left, and right keys to select a custom method for setting. The microwave extraction parameters are set to:
[0078] Under the above setting conditions, extract; after the solution extraction is completed, turn off the power after natural cooling, and release the pressure.
[0079] (c) Pour the solution into a clean larg...
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Abstract
The invention discloses a detecting method for pentachlorophenol in a plastic component of an electronic element. The detecting method comprises the following steps of (a) treating a sample to form particles, wherein the length and width of each particle are respectively not larger than 0.5cm; (b) placing the sample treated in the step (a) into a hexane and acetonemixed solution to carry out microwave extraction, wherein the ratio of the sample to a solvent for extraction is 1: (5-20)g / mL; (c) adding methylene dichloride into the extracted solution and vibrating, then, adding a potassiumcarbonate solution and vibrating, and standing; (d) sequentially adding n-hexane, acetic anhydride and triethylamine into 1 / 5-1 / 10 of the solution obtained in the step (c), and then, vibrating; (e) analyzing an upper-layer solution obtained after vibrating in the step (d) by using a GC-MS (Gas Chromatography-MassSpectrometer), and setting a special chromatographic condition. The analysis method provided by the invention is rapid and good in repeatability and reproducibility.
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