Sample Preconcentration Articles & Analysis
11 articles found
Analysis of VOCs in air generally includes sample pretreatment and qualitative and quantitative detection. Pretreatment Methods Due to the complex composition in the air, air samples need to be pretreated before the detection of volatile organic compounds in the air. At present, common sample pretreatment methods include solid adsorption/carbon ...
A wide range of analytical services is available at ASSET Laboratories including the organic and inorganic analyses of water, groundwater, storm water, wastewater, soil and hazardous waste samples. They are using Nutech 8900DS Preconcentrator and 3603 Autosampler at their lab in Las Vegas. ...
Why is sample preparation prior to separation essential for your analysis? When using ion chromatography (IC) as an analytical technique, samples often cannot be injected directly onto the separation column. There are several reasons for this: samples may contain particles or colloids, the analyte concentration can be too high or low, the ...
Chromatotec presents a headspace sampling system (following US EPA method 502-2) designed to extract representative samples from a liquid phase. The vaporized sample can be preconcentrated using a trap in order to achieve very low concentrations (ppb and / or ppm). ...
A simple, efficient and inexpensive ligandless cloud point extraction method was developed for the preconcentration of trace amounts of iron from natural water samples, followed by flame atomic absorption spectrometry detection. ...
Lucinda provided great insight covering critical aspects of sample preparation strategies for proteins and presented case studies for GLP-1 and the ANP biomarker. ...
A sensitive and simple method for flame atomic absorption spectrometry determination of traces of cadmium and chromium(III) species in water samples after preconcentration by cloud point extraction has been developed. ...
A new method has been developed for the determination of rare earth elements (REEs) (Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) in water samples based on preconcentration with a mini-column packed with 6-(2-thienyl)-2-pyridinecarboxaldehyde functionalized Amberlite XAD-4 resin prior to their determination using inductively coupled plasma optical ...
A solid phase extraction procedure was developed for preconcentration of toxic heavy metals such as cadmium, cobalt, copper, manganese, lead and zinc in sea water samples. ...
Using a solid-state mass-sensitive detector, picogram sensitivity, universal nonpolar selectivity, and electronically variable sensitivity are achieved. An integrated vapor preconcentrator coupled with the electronically variable detector allows the system to measure vapor concentrations spanning 6 or more orders of magnitude. ...
Inactive cells of yeast Saccharomyces cerevisiae were used for palladium preconcentration. The conditions for biosorption of palladium and its determination in yeast cells by slurry electrothermal atomic absorption spectrometry (ETAAS) were optimised. ...