Determination of trace concentrations of transmuted stable nuclides in TMD detectors using PGAA

A FIA-FAAS apparatus containing a six-channel sorption equipment with five 3 x 26 mm microcolumns packed with Spheron Oxin 1 000, Ostsorb Oxin and Ostsorb DTTA was set up. Combined with sorption from 0.002M acetate buffer at pH 4.2 and desorption with 2M-HCl, copper can be determined at concentrations up to 100, 150 and 200 μg l-1, respectively. For sample and eluent flow rates of 5.0 and 4.0 ml min-1, respectively, and a sample injection time of 5 min, the limit of copper determination is LQ = 0.3 μg l-1, repeatability sr is better than 2% and recovery is R = 100 ± 2%. The enrichment factor is on the order of 102 and is a linear function of time (volume) of sample injection up to 5 min and of the sample injection flow rate up to 11 ml min-1 for Spheron Oxin 1 000 and Ostsorb DTTA. For times of sorption of 60 and 300 s, the sampling frequency is 70 and 35 samples/h, respectively. The parameters of the FIA-FAAS determination (acetylene-air flame) are comparable to or better than those achieved by ETA AAS. The method was applied to the determination of traces of copper in high-purity water.

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Laser optoacoustic detection of trace concentration levels of ethylene, vinylchloride, and styrene in the atmosphere

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19892667 ◽

1989 ◽

Vol 54 (10) ◽

pp. 2667-2673 ◽

Cited By ~ 5

Author(s):

Vojtěch Steiner ◽

Pavel Engst ◽

Zdeněk Zelinger ◽

Milan Horák

Keyword(s):

Detection Limit ◽

Emission Line ◽

Laser Line ◽

Laser Source ◽

Trace Concentration ◽

Selective Determination ◽

Hygienic Standard ◽

Trace Concentrations ◽

Concentration Levels

The optoacoustic analyzer with a tunable CO2 laser source employed in the present work permits a selective determination of ethylene in trace concentrations higher than 5 ppb (=detection limit for the 10P(14) emission line of the CO2 laser, ν = 949.5 cm-1) and of vinylchloride higher than 42 ppb (= detection limit for the 10P(22) CO2 laser line, ν= 942.4 cm-1). this method covers for both compounds the concentration range corresponding to the hygienic standard. It can be also used for the determination of styrene vapour with concentrations higher than 1.5 ppm.

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Novel extraction induced by emulsion breaking as a tool for the determination of trace concentrations of Cu, Mn and Ni in biodiesel by electrothermal atomic absorption spectrometry

Talanta ◽

10.1016/j.talanta.2013.08.042 ◽

2013 ◽

Vol 117 ◽

pp. 32-38 ◽

Cited By ~ 32

Author(s):

Fernanda M. Pereira ◽

Renata C. Zimpeck ◽

Daniel M. Brum ◽

Ricardo J. Cassella

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Electrothermal Atomic Absorption Spectrometry ◽

Absorption Spectrometry ◽

Trace Concentrations

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Application of screen-printed sensors for the determination of painkillers

Annales Universitatis Mariae Curie-Sklodowska sectio AA – Chemia ◽

10.17951/aa.2018.73.1.111-124 ◽

2019 ◽

Vol 73 (1) ◽

pp. 111

Author(s):

Agnieszka Sasal ◽

Katarzyna Tyszczuk-Rotko

Keyword(s):

Pharmaceutical Preparations ◽

New Methods ◽

Printed Sensors ◽

Water Ecosystems ◽

Trace Concentrations ◽

Intensive Development ◽

Active Substances ◽

Routine Quality Control ◽

Screen Printed

<p>This paper addresses the problem of the intensive development of the pharmaceutical industry and its consequences for the natural environment. The characteristics of the most commonly consumed pharmaceutical preparations and the ways of these substances penetrating into water ecosystems are presented. Attention was paid to the need to monitor environmental contamination and to search for new methods that would enable routine quality control of natural water samples. The application of modern, miniature screen-printed sensors for the determination of trace concentrations of selected active substances of pharmaceutical preparations are presented.</p>

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