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Papers by valentina vassilenko

Research paper thumbnail of Determination of non polar metabolites in human plasma using innovative sample preparation strategies coupled with gas chromatography and mass spectrometry

Research paper thumbnail of Identification of human calculi with time-of-flight secondary ion mass spectrometry

Rapid Communications in Mass Spectrometry, 2010

Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compar... more Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compare the results with those from twelve commercially available urinary calculi minerals including three organic compounds (L-cystine, uric acid and sodium urate). Phase identification of calcium phosphate compounds was carried out by considering the relative ion abundances of [Ca2O]+ and [CaPO2]+. Deprotonated [M–H]− and protonated [M+H]+ uric acid were detected and used for component recognition in pure uric acid and in the mixed samples of struvite, calcium oxalate and uric acid. Iodine related to the medical history of a patient was also detected. Copyright © 2009 John Wiley & Sons, Ltd.

Research paper thumbnail of Identification of human calculi with time-of-flight secondary ion mass spectrometry

Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compar... more Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compare the results with those from twelve commercially available urinary calculi minerals including three organic compounds (L-cystine, uric acid and sodium urate). Phase identification of calcium phosphate compounds was carried out by considering the relative ion abundances of [Ca 2 O] R and [CaPO 2 ] R . Deprotonated [M-H] À and protonated [MRH] R uric acid were detected and used for component recognition in pure uric acid and in the mixed samples of struvite, calcium oxalate and uric acid. Iodine related to the medical history of a patient was also detected.

Research paper thumbnail of Determination of non polar metabolites in human plasma using innovative sample preparation strategies coupled with gas chromatography and mass spectrometry

Research paper thumbnail of Identification of human calculi with time-of-flight secondary ion mass spectrometry

Rapid Communications in Mass Spectrometry, 2010

Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compar... more Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compare the results with those from twelve commercially available urinary calculi minerals including three organic compounds (L-cystine, uric acid and sodium urate). Phase identification of calcium phosphate compounds was carried out by considering the relative ion abundances of [Ca2O]+ and [CaPO2]+. Deprotonated [M–H]− and protonated [M+H]+ uric acid were detected and used for component recognition in pure uric acid and in the mixed samples of struvite, calcium oxalate and uric acid. Iodine related to the medical history of a patient was also detected. Copyright © 2009 John Wiley & Sons, Ltd.

Research paper thumbnail of Identification of human calculi with time-of-flight secondary ion mass spectrometry

Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compar... more Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compare the results with those from twelve commercially available urinary calculi minerals including three organic compounds (L-cystine, uric acid and sodium urate). Phase identification of calcium phosphate compounds was carried out by considering the relative ion abundances of [Ca 2 O] R and [CaPO 2 ] R . Deprotonated [M-H] À and protonated [MRH] R uric acid were detected and used for component recognition in pure uric acid and in the mixed samples of struvite, calcium oxalate and uric acid. Iodine related to the medical history of a patient was also detected.

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