Publications by authors named "Claudia Niegel"
Article Synopsis
- A new method combining fast capillary electrophoresis (CE) and time-of-flight mass spectrometry (TOF-MS) successfully separated four organoarsenic species for the first time using short CE capillaries and high electric fields.
- Aqueous formic acid was used as a background electrolyte, with a specific buffer (0.1 M formic acid/ammonium formate at pH 2.8) chosen for optimal separation efficiency.
- The method allowed rapid detection of certain arsenic compounds in seagrass and algae samples, achieving separation in as little as 10 seconds for specific species.
Arsenic-containing carbohydrates, generally termed arsenosugars, have been the subject of increasing analytical interest in arsenic speciation analysis. The present review gives an overview concerning achievements and trends in the field of instrumental analysis of arsenosugars. The typical experimental approaches for sample pre-treatment, extraction, separation and detection are discussed.
View Article and Find Full Text PDFThe detection of a mixture of nine explosive compounds, including nitrate esters, nitroaromatics, and a nitramine in less than 140 sec is described. The new method employs a commercially available pulsed-discharge electron capture detector (PDECD) coupled with a microbore capillary gas chromatography (GC) column in a standard GC oven to achieve on-column detection limits between 5 and 72 fg for the nine explosives studied. The PDECD has the benefit that it uses a pulsed plasma to generate the standing electron current instead of a radioactive source.
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