PubAg

Main content area

You searched for: Journal Analytica chimica acta Remove constraint Journal: Analytica chimica acta Publication Year 2012 Remove constraint Publication Year: 2012 Subject ionization Remove constraint Subject: ionization Subject derivatization Remove constraint Subject: derivatization Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

3  Search Results

1 - 3 of 3
Number of results to display per page

Search Results

1. Determination of polycyclic aromatic hydrocarbons and their oxy-, nitro-, and hydroxy-oxidation products

Author:
Cochran, R.E.; Dongari, N.; Jeong, H.; Beránek, J.; Haddadi, S.; Shipp, J.; Kubátová, A.
Source:
Analytica chimica acta 2012 v.740 pp. 93-103
ISSN:
0003-2670
Subject:
air; derivatization; gas chromatography-mass spectrometry; ionization; methane; monitoring; oxidation; particulates; polycyclic aromatic hydrocarbons; smoke; solid phase extraction; temperature
Abstract:
... A sensitive method has been developed for the trace analysis of PAHs and their oxidation products (i.e., nitro-, oxy-, and hydroxy-PAHs) in air particulate matter (PM). Following PM extraction, PAHs, nitro-, oxy-, and hydroxy-PAHs were fractionated using solid phase extraction (SPE) based on their polarities. Gas chromatography–mass spectrometry (GC–MS) conditions were optimized, addressing inject ...
DOI:
10.1016/j.aca.2012.05.050

2. Determination of perfluorocarboxylic acids in water by ion-pair dispersive liquid–liquid microextraction and gas chromatography–tandem mass spectrometry with injection port derivatization

Author:
Liu, Wen-Lin; Ko, Yen-Chen; Hwang, Bao-Huey; Li, Zu-Guang; Yang, Thomas Ching-Cherng; Lee, Maw-Rong
Source:
Analytica chimica acta 2012 v.726 pp. 28-34
ISSN:
0003-2670
Subject:
acids; derivatization; detection limit; gas chromatography; hydrogen; ionization; liquid-phase microextraction; river water; tandem mass spectrometry
Abstract:
... A novel technique for derivatization in a gas chromatograph injection port after a one-step extraction of trace perfluorocarboxylic acids (PFCAs) in water with ion pair formation during dispersive liquid–liquid microextraction (DLLME) was investigated. Tetrabutylammonium hydrogen sulfate (TBAHS) was used as the ion pair reagent. PFCA butyl ester derivatives were formed in the GC injection port and ...
DOI:
10.1016/j.aca.2012.03.019

3. Novel methods for the quantification of (2E)-hexadecenal by liquid chromatography with detection by either ESI QTOF tandem mass spectrometry or fluorescence measurement

Author:
Lüth, Anja; Neuber, Corinna; Kleuser, Burkhard
Source:
Analytica chimica acta 2012 v.722 pp. 70-79
ISSN:
0003-2670
Subject:
derivatization; detection limit; fluorescence; human cell lines; ionization; liquid chromatography; metabolism; quantitative analysis; sphingolipids; tandem mass spectrometry
Abstract:
... Sphingosine-1-phosphate lyase (SPL) is the only known enzyme that irreversibly cleaves sphingosine-1-phosphate (S1P) into phosphoethanolamine and (2E)-hexadecenal during the final step of sphingolipid catabolism. Because S1P is involved in a wide range of physiological and diseased processes, determining the activity of the degrading enzyme is of great interest. Therefore, we developed two procedu ...
DOI:
10.1016/j.aca.2012.01.063