Detectors, capillary

Hewlett-Packard Model 6890 equipped with a nitrogen-phosphorus flame ionization detector Capillary column for gas-liquid chromatography (GLC), DB-1, 0.53-mm i.d. x 15 m, l-pm film thickness (J W Scientific)... 

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... 

Bioluminescence detector Charge-coupled device Contactless-conductivity detector Capillary electrophoresis Capillary electrophoresis-Electrochemistry Collision-induced dissociation Chemiluminescence detector Sodium chlorate-nitrobenzene Commercial off-the-shelf (U.S. Army) Cold Regions Research and Development Center Croatian Mine Action Center Council of Scientific and Industrial Research,... 

Dhadwal HS, Mukherjee B, Kemp P et al (2007) A dual detector capillary waveguide biosensor for detection and quantification of hybridized target. Anal Chim Acta 598 147-154... 

In order to connect the column by means of terminators to the injection port and detector, capillary tubing is often used. At the high-pressure side usually 316 stainless-steel capillary tubing and at the low pressure (detector) side both 316 stainless-steel and PTFE capillary tubings are applied. The peak broadening in capillary tubing, expressed in terms of the standard deviation (in volume units) of the elution curve as a function of the length and radius. 

Kennedy s group used microdialysis sampling to monitor extracellular dopamine concentration in the brains of rats. The dialysate, mixed online with 6 mM naphthalene-2,3-dicarboxaldehye and 10 mM potassium cyanide in a reaction capillary, was periodically analyzed by MEKC at 90-s intervals [60]. The MEKC system consisted of a 10 p,m ID, 369 p,m OD, and 16 cm (14.5 cm to the detector) capillary, 30 mM phosphate buffer (pH 7.4) containing 6.5 mM SDS and 2 mM 2-hydoxypropyl-)3-CD, with LIE detection using the 413-nm line of a 14-mW diode-pumped laser, and an electric field of 850 V/cm. The detection limit for dopamine was 2 nM when sampling by microdialysis. The separation capability of the developed method is illustrated in Figure 3.10 where... 

Un cutumn injector detection, flame ionization detector capillary column, length, 7.5 m 0, 0.2.5 mm phase SF 52/5 l film thickness, 0.15 pm oven lemperature, 60-340 C, 10°Omrn 0.7 bar transeslerification with trimelhylammonium hydroxide. Gas chromatcijjraphy (CG conditions as in foolnoie a oven temperaiure 60-2S0°C. silylated derivatives, N,0-b -(ifimethylsilyl)-trinuoroaceiamiitelrlmethylchlorosilarelBSTFA/TMCS). ... 

Figure 4 Eiectropherogram of the anaiysis of cationic impurities in drug Carbetocin with conductivity detector. Capillary, 70.0cm, 50pm, fused silica running electrolyte, SOmmoll" histidine, 30 mmol 1 2-morpholinoethan-sulfonic acid separation voltage, 30 kV injection, hydrodynamic, 20mbarfor6s detection, conductometric. Peaks 1, K" 2, Ba 3, Ca + 4, Mg " 5, Na" 6, Li". (Kindly provided by Dr. I. Jelfnekfrom our Department.)...

Gas-liquid chromatography (GLC), or gas chromatography (GC), was first developed by lipid analysts. From its beginning more than 60 years ago, the instrumentation has become more sophisticated and accurate with the development of new detectors, capillary columns, temperature and pressure programming, etc. Many reviews and books detail these developments. Among the more comprehensive ones are the several books published by Dr. William W. Christie and his regularly updated website Lipid Library, whose... 

Detector MS, Micromass Quattro triple-stage quadrupole, ESI, 100 ixIVmin of column effluent entered the detector, capillary 3.2 kV, source 130°, desolvation 400°, desolvation gas nitrogen 650 L/h, nebulizer gas nitrogen 75 L/h, collision gas argon, cone 30 V, collision energy 15 eV m/z 363-320... 

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