Identification of inorganic anions by gas chromatography/mass spectrometry

Sakayanagi, Masataka; Yamada, Y.; Sakabe, Chikako; Watanabe, Kunio; Harigaya, Yoshihiro

doi:10.1016/j.forsciint.2005.04.003

Cited by 23 publications

(19 citation statements)

References 16 publications

(22 reference statements)

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“…However, their method did not give enough sensitivity for fl uoride with a detection limit of 4.75 mg/l. The present method showed sensitivity much higher than theirs [25]. PFBBr is much superior to PFBTsO as a fl uoride alkylating agent.…”

Section: Resultsmentioning

confidence: 63%

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Determination of fluoride in human whole blood and urine by gas chromatography-mass spectrometry

Kage¹,

Kudo

Nishida

et al. 2008

Forensic Toxicol

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Section: Resultsmentioning

confidence: 63%

“…Sakayanagi et al [25] attempted to determine 10 inorganic anions, including fl uoride, in beverages (not human samples) with pentafl uorobenzyl p-toluenesulfonate (PFB-TsO) in the presence of a counter ion-crown ether complex by GC-MS. However, their method did not give enough sensitivity for fl uoride with a detection limit of 4.75 mg/l.…”

Section: Resultsmentioning

confidence: 99%

Determination of fluoride in human whole blood and urine by gas chromatography-mass spectrometry

Kage¹,

Kudo

Nishida

et al. 2008

Forensic Toxicol

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“…abun., relative abundance, i.e., the peak area percentage of each lipid within its respective group. d In general the 0.5-⌬ mmu (milli-mass unit) range was used as a measure of very high-confidence molecular formula assignments, and the 1.0-⌬ mmu range was used as a measure of good-confidence molecular formula assignments (63)(64)(65). chemical shift as well compared to the head group ␦-position signal in the ornithine lipid spectra.…”

Section: Unknown Ipls Detected By Hplc-esi/it/msmentioning

confidence: 99%

Novel Mono-, Di-, and Trimethylornithine Membrane Lipids in Northern Wetland Planctomycetes

Moore

Hopmans

Rijpstra

et al. 2013

Appl Environ Microbiol

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dNorthern peatlands represent a significant global carbon store and commonly originate from Sphagnum moss-dominated wetlands. These ombrotrophic ecosystems are rain fed, resulting in nutrient-poor, acidic conditions. Members of the bacterial phylum Planctomycetes are highly abundant and appear to play an important role in the decomposition of Sphagnum-derived litter in these ecosystems. High-performance liquid chromatography coupled to high-resolution accurate-mass mass spectrometry (HPLC-HRAM/MS) analysis of lipid extracts of four isolated planctomycetes from wetlands of European north Russia revealed novel ornithine membrane lipids (OLs) that are mono-, di-, and trimethylated at the -nitrogen position of the ornithine head group. Nuclear magnetic resonance (NMR) analysis of the isolated trimethylornithine lipid confirmed the structural identification. Similar fatty acid distributions between mono-, di-, and trimethylornithine lipids suggest that the three lipid classes are biosynthetically linked, as in the sequential methylation of the terminal nitrogen in phosphatidylethanolamine to produce phosphatidylcholine. The mono-, di-, and trimethylornithine lipids described here represent the first report of methylation of the ornithine head groups in biological membranes. Various bacteria are known to produce OLs under phosphorus limitation or fatty-acid-hydroxylated OLs under thermal or acid stress. The sequential methylation of OLs, leading to a charged choline-like moiety in the trimethylornithine lipid head group, may be an adaptation to provide membrane stability under acidic conditions without the use of scarce phosphate in nutrient-poor ombrotrophic wetlands.

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“…Such an approach may introduce a high rate of false-identification, especially in analysis of complex samples such as human plasma. GC-mass spectrometry (MS) methods were published for the determination of fluoride in human whole blood and urine after derivatization with pentafluorobenzyl bromide [20] and pentafluorobenzyl p-toluenesulphonate [21], but these methods do not have a sufficient detection limit to detect fluoride in real samples. Headspace (HS) GC-MS following ethylation with triethyloxonium tetrachloroferrate(III) has been recently developed for the sensitive analysis of fluoride in tap water, seawater, and urine [22].…”

Section: Introductionmentioning

confidence: 99%

Sensitive determination of fluoride in biological samples by gas chromatography–mass spectrometry after derivatization with 2-(bromomethyl)naphthalene

Kwon

Shin

2014

Analytica Chimica Acta

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Identification of inorganic anions by gas chromatography/mass spectrometry

Cited by 23 publications

References 16 publications

Determination of fluoride in human whole blood and urine by gas chromatography-mass spectrometry

Determination of fluoride in human whole blood and urine by gas chromatography-mass spectrometry

Novel Mono-, Di-, and Trimethylornithine Membrane Lipids in Northern Wetland Planctomycetes

Sensitive determination of fluoride in biological samples by gas chromatography–mass spectrometry after derivatization with 2-(bromomethyl)naphthalene

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