Capillary temperature

Sheath gas flow Auxiliary gas Heated capillary temperature Source voltage Divert valve... 

InsAument parameters (sheath and auxiliary gas flows, spray voltage, capillary temperature, collision cell gas flow and offset, etc.) should be optimized while infusing a standard of tebuconazole prior to the Arst attempt at analysis. Optimization should be performed at an HPLC Aow rate and composition simulating those present during elution of tebuconazole using each HPLC condition set employed... 

Mode Interface Spray voltage Sheath gas Auxiliary gas Capillary temperature Manifold temperature Collision gas Total scan time QIMS resolution voltage added Q3MS resolution voltage added Parent masses... 

Figure 8.4 Positive ion direct atmospheric pressure LD mass spectrum of in vitro grown P. falciparum parasites. Protocol C is used for sample preparation estimated number of parasites deposited is approximately 103. A commercially available AP LD quadrupole ion trap (LCQ) system is used.19,20 Typical laser beam spot diameter is 0.5 mm acquisition time is approximately 20 s LCQ inlet capillary temperature -200°C.

An electrophoretic method was developed for the simultaneous determination of artificial sweeteners, preservatives and colours in soft drinks. The samples were degassed by sonication, filtered and used for analysis without any other pretreatment. Measurements were realized in uncoated fused-silica capillaries, the internal diameter being 50 ptm. Capillary lengths were 48.5 cm (40 cm to the detector) and 65.4 cm (56 cm to the detector). Capillaries were conditioned by washing them with (1 M sodium hydroxide (10 min), followed by 0.1 M sodium hydroxide (5 min) and water (5 min). Samples were injected hydrodinamically (250 mbar) at the anodic end. Analyses were performed at a voltage of 20 kV and the capillary temperature was 25°C. Analytes having ionizable substructure... 

CZE using cyclodextrins (CD) as buffer additives has also been employed for the determination of synthetic dyes in various food products. The synthetic dyes New coccine, Erythrosine, Allura red AC, Tartrazine, Sunset yellow FCF, Brilliant blue FCF, Indigo carmine and Fast green FCF were included in the experiments. Measurements were carried out in a used-silica capillary (47 cm length, 40 cm to the detector, 50 pm i.d.). Capillary temperature was 25°C and separation voltage was 20 kV. Pressure injection was performed... 

Capillary Temperature Protein conformation and solubility are affected by the temperature of the solution. As described above, focused proteins may tend to precipitate during the CIEF process as they become highly concentrated at their pi with low concentration of salt ions. The temperature of the capillary can be manipulated to increase their solubility, but it should not be too high as protein denaturahon may occur. Higher temperature is used mainly in combination with other solubilizing agents, and temperature may be used to increase the solubility of additives such as urea rather than the solubility of the proteins. 

Internal capillary temperature and effect upon performance. Chromatographia 38, 207—214. 

The selected factors are either mixture-related, quantitative (continuous), or qualitative (discrete).A mixture-related factor is, for instance, the fraction organic solvent in the buffer system. Examples of quantitative factors are the electrolyte concentration, the buffer pH, the capillary temperature, and the voltage, and of qualitative factors the manufacturer or the batch number of a reagent, solvent, or capillary. Sample concentration (see Table 1) is a factor sometimes included. However, the aim of the method tested is to determine this concentration through the measured signal, from a calibration procedure. Thus, one evaluates the influence of the sample concentration on the sample concentration, which we do not consider a good idea. 

Examined factors were the chiral selector concentration, the buffer or electrolyte concentration, the buffer or electrolyte pH, the capillary temperature, and the... 

Examined factors were buffer or electrolyte concentration,buffer or electrolyte pH,7i,73,74 Q). electrolyte ionic strength, " rinse times,capillary temperature,... 

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