Mass spectrometry in polymer chemistry

... from polyacrylamide gel and digested by trypsin The peptides were analyzed by MS and were analyzed using the Aldente and FindMod tools The comparison of the mass spectra obtained for each spot with ... some enzymes of the glycolytic family and chaperones; and, on the other hand, that citrullination is involved in the antigenic properties of some of these antigens The glyc...

Ngày tải lên: 09/08/2014, 13:22

... study the degradation behavior in ultrapure water, drinking water, rain water, river water and seawater under various pH and irradiation sources (sunlight, darkness, indoor incandescent lighting and ... propham (66 %), which probably underwent thermal degradation under the extraction conditions The results indicate that although carbamates tested in this study are thermally...

Ngày tải lên: 16/09/2015, 17:13

... freedom for the assignment of the variables under consideration The assignment of the main variables (A, B, C and D), two-variable interaction, and the level setting values of the main variables ... optimization of the MAE conditions To apply these techniques in practical applications, in this chapter I 138 demonstrated the application of these techniques...

Ngày tải lên: 16/09/2015, 17:13

... 88 An interesting result observed from Fig 4- 6 is that in the same solvent, the recovery increases in going from PAHs to PCBs, and then to triazines (i.e, increasing polarity of analyte) The recovery ... 88.1±3.7 89.8±3.2 91 .4 3.0 93.5 4. 5 41 .0±3.8 18 .4 4. 0 10 80.0±3.6 84. 2 4. 5 89.2±5.0 90.2 4. 0 93.2±2.9 94. 6±3.7 36.8±2.8 15.2±2 .4 15 79 .4 5.0 84. 6±3.6 86.6±3.6 87...

Ngày tải lên: 16/09/2015, 17:13

... 160.9 31 8.2 250.6 53. 3 3. 07 2.1 1. 43 60 52 45 * at pH 10.5, units of k and t1/2 are s-1 and s, respectively a incandescent lighting 64 3. 3 .3 Degradation of Propoxur in Natural Water In order to provide ... light intensity affects the K and t½ in each natural water sample K increases and t½ decreases accordingly when the light intensity increases in the ord...

Ngày tải lên: 16/09/2015, 17:13

... levels of the target analysts in soil samples before spiking 2. 3 .2. 2 Freshly spiked soils Freshly spiked soil samples were prepared by adding an appropriate volume of spiking solutions into the ... possible traces of PAHs, PCBs, triazines, carbamates and other organic contaminants, 100 g of each of the soil sample was immersed in 20 0 ml 46 each of methanol,...

Ngày tải lên: 16/09/2015, 17:13

... From Table 1- 5, it can be seen that various classes of pesticides have been determined by employing either LC-ESI-MS [11 1 -11 7, 12 1, 12 3] or LC-APCI-MS [11 8, 11 9, 12 2] The combination of SPE with ... ESI–PI–MS 5 10 11 6 GW off-line, 1L, SPE, ESI–NI–MS 5 10 11 5 SW off-line, 0.2L, SPE, ESI–PI–MS 20–30 11 7 Imidazolinone DW off-line, 2L, SPE, ESI–PI–MS about 11 3 Phenoxy...

Ngày tải lên: 16/09/2015, 17:13

... the nutrient and their sizes, how they are connected, and how their masses change over time Modeling begins with a thorough review existing knowledge of the metabolism of the nutrient under investigation ... cleaving to vitamin A The pattern of total 14 C,14 C-b-carotene, 14 C-retinyl esters, and 14 C-retinol in plasma is shown in Figure 17.4 Days postdose FIGURE 1...

Ngày tải lên: 11/04/2017, 11:10

... concentration of EDTA (443 μg/L) was observed in a Table - Table – Recovery of EDTA fromtap water samples and tap water Recovery of EDTA from Milli-Q water and Milli-Q water Recovery of triplicate samples ... an EDTA analytical method to the Japanese Standard Methods for the Examination of Water Occurrence of EDTA in river water samples from three r...

Ngày tải lên: 05/09/2013, 10:15

... METHOD 525.2 DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY 1.0 SCOPE AND APPLICATION 1.1 This ... procedures for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is appl...

Ngày tải lên: 22/03/2014, 14:20

... Pressure Ionization (Spray Methods) In these methods, a solution containing the analyte is sprayed at atmospheric pressure into an interface to the vacuum of the mass spectrometer ion source A combination ... C24H38O4, m/z 390.54 Similar in use to NPOE Widespread contaminant in solvents, gives characteristic 149 peak in EI mass spectra Use care to avoid contaminating the mass...

Ngày tải lên: 22/03/2014, 14:20

... Data Processing and Statistical Analysis The preprocessing of data that included averaging of technical repeats, interpolation of missing or non-aligned points, binning of neighboring points to reduce ... resolution of the analyzer operating in the linear mode or might result in overlapping of ions originating from protein/ peptides of very similar molecular masses In...

Ngày tải lên: 18/06/2014, 15:20

... question of detecting therapy-related changes in the mass profiles registered for blood samples collected from breast cancer patients SELDI-ToF analysis of the plasma proteome of breast cancer patients ... Pietrowska et al., Mass spectrometry-based analysis of therapy-related changes in serum proteome patterns of patients with earlystage br...

Ngày tải lên: 18/06/2014, 16:20

... screw-cap vial for HPLC analysis and 100 µL of the working solution of the internal standard were added to each sample Then the samples were vortex mixed and a 900 µL aliquot was injected into the LC/MS/MS ... some of the structural isomers of prostaglandins, which resulted in the same parent-daughter ion transitions The whole analytical run time, including the...

Ngày tải lên: 20/06/2014, 00:20