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Towards universal detection and quantification of dissolved organic matter with charged aerosol detector
ID
Može, Martina
(
Avtor
),
ID
Kočar, Drago
(
Mentor
)
Več o mentorju...
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Izvleček
The charged aerosol detector (CAD) works on the principle of detecting non-volatile analytes in a mobile phase comprised of volatile components. It is usually implemented in the chromatographic workflow instead of usual ultraviolet absorption (UV) detector when analytes lack chromophores. Its response, which is independent of chemical structure, derives from a formation of solid particles from non-volatile analytes under consistent flow. The detector has already been used to also detect and quantify compounds with unknown structures, mostly in pharmaceutical analysis. Here, CAD was implemented to investigate samples of dissolved organic matter (DOM) after isocratic size-exclusion chromatography. Initially, individual compounds in different mobile phases were tested on CAD to better understand its response. The response of different compound groups was compared to the response of reference material of fulvic acids that has been isolated from rivers. The main objective was to create a universal calibration curve that would fit a variety of chemical compounds usually found in the environment. Fractions of the reference material were also captured after separation and tested by a total organic carbon detector to test CAD’s universality. CAD’s response was also compared to commonly used UV and electrospray ionisation with detection by mass spectrometry. These two detectors were shown to cover different DOM pools of fulvic acids which were separated under the chromatographic conditions. Additionally, fractions from UV active and ionisable pools were collected and measured on proton NMR instrument to get information about structural composition of both fractions.
Jezik:
Angleški jezik
Ključne besede:
Dissolved organic matter
,
charged aerosol detector
,
size-exclusion chromatography
,
UV and ESI-MS detectors
,
SRFA
Vrsta gradiva:
Magistrsko delo/naloga
Tipologija:
2.09 - Magistrsko delo
Organizacija:
FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Leto izida:
2020
PID:
20.500.12556/RUL-122381
COBISS.SI-ID:
43985667
Datum objave v RUL:
07.12.2020
Število ogledov:
1113
Število prenosov:
142
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Objavi na:
Sekundarni jezik
Jezik:
Slovenski jezik
Naslov:
Detekcija in kvantifikacija raztopljene organske snovi z detektorjem nabitih aerosolov
Izvleček:
Magistrsko delo se osredotoča na implementacijo detektorja nabitih aerosolov za analizo raztopljene organske snovi. Obravnava njegov univerzalen odziv ter kvantifikacijo kompleksnih okoljskih vzorcev.
Ključne besede:
Raztopljena organska snov
,
detektor nabitih aerosolov
,
velikostno izključitvena kromatografija
,
UV-Vis detektor in ESI-MS detektor
,
SRFA
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