Generování těkavých specií zinku pro detekci atomovou spektrometrií
This diploma thesis deals with the determination of zinc by volatile species generation with detection by atomic absorption or fluorescence spectrometry. Volatile zinc species are generated using hydrochloric acid and sodium borohydride stabilized with sodium hydroxide. Conditions influencing the ge...
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2021
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Online Access: | http://www.nusl.cz/ntk/nusl-449003 |
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ndltd-nusl.cz-oai-invenio.nusl.cz-4490032021-08-08T17:11:06Z Generování těkavých specií zinku pro detekci atomovou spektrometrií Generation of zinc volatile species for determination by atomic spectrometry Dlouhá, Kateřina Nováková, Eliška Kratzer, Jan This diploma thesis deals with the determination of zinc by volatile species generation with detection by atomic absorption or fluorescence spectrometry. Volatile zinc species are generated using hydrochloric acid and sodium borohydride stabilized with sodium hydroxide. Conditions influencing the generation and atomization of volatile species were optimized, namely hydrochloric acid concentration, sodium borohydride concentration, sodium hydroxide concentration, hydrochloric acid flow rate, sample loop volume, reaction coil volume, frit porosity in a gas-liquid separator, argon and hydrogen flow rates, and last, the temperature to which the quartz atomizer is heated. Under the optimal conditions, the detection limit of 33 μg·l−1 and the limit of determination of 110 μg·l−1 were reached. It was found that the addition of various reagents (especially 8-hydroxyquinoline) can increase the generation efficiency. With the addition of 1 % (m/V) 8-hydroxyquinoline to the standard/sample the limit of detection was 4 μg·l−1 and the limit of quantification was 12 μg·l−1 . Using an atomic fluorescence spectrophotometer as the detector, the standard reference material was analyzed and good match with the certified concentration value was found, the certified zinc concentration value in the reference material is... 2021 info:eu-repo/semantics/masterThesis http://www.nusl.cz/ntk/nusl-449003 cze info:eu-repo/semantics/restrictedAccess |
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Dissertation |
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This diploma thesis deals with the determination of zinc by volatile species generation with detection by atomic absorption or fluorescence spectrometry. Volatile zinc species are generated using hydrochloric acid and sodium borohydride stabilized with sodium hydroxide. Conditions influencing the generation and atomization of volatile species were optimized, namely hydrochloric acid concentration, sodium borohydride concentration, sodium hydroxide concentration, hydrochloric acid flow rate, sample loop volume, reaction coil volume, frit porosity in a gas-liquid separator, argon and hydrogen flow rates, and last, the temperature to which the quartz atomizer is heated. Under the optimal conditions, the detection limit of 33 μg·l−1 and the limit of determination of 110 μg·l−1 were reached. It was found that the addition of various reagents (especially 8-hydroxyquinoline) can increase the generation efficiency. With the addition of 1 % (m/V) 8-hydroxyquinoline to the standard/sample the limit of detection was 4 μg·l−1 and the limit of quantification was 12 μg·l−1 . Using an atomic fluorescence spectrophotometer as the detector, the standard reference material was analyzed and good match with the certified concentration value was found, the certified zinc concentration value in the reference material is... |
author2 |
Nováková, Eliška |
author_facet |
Nováková, Eliška Dlouhá, Kateřina |
author |
Dlouhá, Kateřina |
spellingShingle |
Dlouhá, Kateřina Generování těkavých specií zinku pro detekci atomovou spektrometrií |
author_sort |
Dlouhá, Kateřina |
title |
Generování těkavých specií zinku pro detekci atomovou spektrometrií |
title_short |
Generování těkavých specií zinku pro detekci atomovou spektrometrií |
title_full |
Generování těkavých specií zinku pro detekci atomovou spektrometrií |
title_fullStr |
Generování těkavých specií zinku pro detekci atomovou spektrometrií |
title_full_unstemmed |
Generování těkavých specií zinku pro detekci atomovou spektrometrií |
title_sort |
generování těkavých specií zinku pro detekci atomovou spektrometrií |
publishDate |
2021 |
url |
http://www.nusl.cz/ntk/nusl-449003 |
work_keys_str_mv |
AT dlouhakaterina generovanitekavychspeciizinkuprodetekciatomovouspektrometrii AT dlouhakaterina generationofzincvolatilespeciesfordeterminationbyatomicspectrometry |
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1719459421695770624 |