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Gas chromatography / mass spectrometry determination of groundwater in semi-volatile material has to be


Spectrometry determination of semi-volatile organic compounds in groundwater 91 (1) the standard spectrum of each compound relative intensity of ions greater than 10% of the base peaks should be present. (2) fragment ion spectra of the intensity of the corresponding standard ion peak intensity difference should be within 20%. Through this instrument performance check, for several different concentrations of target compounds for analysis, sample concentrations were measured from low to high. Finally, by all the target compounds GC / MS external standard response curve, and calculate the relative response factor for each target compound (RRF) and relative standard deviation (RSD%). 32 target compounds in the standard curve shown in Figure 2. Table 3 sets the target of the material and test results Tabk3Targetcompoundandtestresults92 'Mining the beginning of breeding is tough when RD% ≤ 30, to calibrate D% ≤ 25 ... .... Time. Figure 1 sets the target of rain total ion chromatogram Fig1Diagramoftotalionflowoftargetcompound object relative area ratio target of 2 sets of the first things ugly standard curve Fig. 2Standardc31rveofNo. 32targeteompound GC Sampling points and sample numbers are samples 1 Arai Arai Arai 2 3 4 new water wells and blood samples by 3510 No. WIW2W3W4 liquid-liquid extraction method of sample preparation, the process shown in Figure 3 4.2 Test conditions and results of the test conditions and The agreement to establish a database of quantitative calibration sample injection volume of new wells for the lptL election shovel the total ion current shown in Figure 4. The overall results of the analysis in Table 4 Order of around 3 500mL sample preparation flow chart Fig. 3Flowshoetofsamplepreparation Water Out 'a J. . JI projects. ... I around 44 new wells around the total ion current Fig. 4DiagramoftotalionflowofNo. 4newweU Table 4 the total number of points off the peak results Table4Totalanalysisresults name w1w2w3w4InOutLD] e delete ert94 'mining and metallurgy from the four new wells and out of the water analysis results shows that the detection of 19 kinds of priority monitoring compounds,true religion outlet, their content of 8.6 ~ 338.6ppb,diesel store paris, testing four wells of water is not contaminated. References 1Edbe octopus JW. HaLE, BeddeWLAna1. Chem. 197S47 (7): 9952 recently. Regist. 1984,49 (209): 153.3usJPAcu 'a 43/SV.10/905QMASS a 910 operating manual Quanfitation88 ~ 66 China Environmental Monitoring terminus translated Solid Waste Analysis Evaluation Manual. Beijing: China Environmental Science Press,ed hardy uk, 1992. (Continued from page 87) In addition, Japanese companies have purchased our ring Nd-Fe-B produced by the patent, to create favorable conditions for export; (5) relatively high magnetic sintered magnets will remain the mainstream products, from management to ensure high efficiency, low cost product consistency and stability of China's state-owned enterprises is particularly important. Fe-B conference proceedings the National Association of magnetic materials and devices industry publication Chongqing .1994. permanent magnetic materials and application technology development of new progress first magnetic Symposium Beijing: China Science and Technology Press, a groan 21991 National Magnet Conference Proceedings revolves end. magnetic materials and devices Industry Association Publishing, 1991, identified the city in Liaoning. Hong Wei wild for a long time (days). foreign metals, 1990, (21:37. Xiuzhen Chen Chang-Pin. Materials Science and Engineering .1990,vibram five fingers outlet,8 (39: l_
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