liquid chromatography electrospray ionization tandem mass spectrometry  (Waters Corporation)

 
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    Waters Corporation liquid chromatography electrospray ionization tandem mass spectrometry
    Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry, supplied by Waters Corporation, used in various techniques. Bioz Stars score: 90/100, based on 8 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/liquid chromatography electrospray ionization tandem mass spectrometry/product/Waters Corporation
    Average 90 stars, based on 8 article reviews
    Price from $9.99 to $1999.99
    liquid chromatography electrospray ionization tandem mass spectrometry - by Bioz Stars, 2020-09
    90/100 stars

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    High Performance Liquid Chromatography:

    Article Title: Chronic photo-oxidative stress and subsequent MCP-1 activation as causative factors for age-related macular degeneration
    Article Snippet: .. Lipid extracts were re-dissolved in methanol:water (90:10) and liquid chromatography–electrospray ionization tandem mass spectrometry (LC–ESI–MS–MS) performed using a Prodigy ODS C18 column for separation of the lipids and the HPLC solvent system (Waters, Milford, MA). .. Mass spectrometric analyses were performed using ESI–MS–MS in the positive ion, multiple reaction monitoring (MRM) mode (cone energy 30 V, collision energy 25 eV).

    Hydrophilic Interaction Liquid Chromatography:

    Article Title: The Apicomplexa-specific glucosamine-6-phosphate N-acetyltransferase gene family encodes a key enzyme for glycoconjugate synthesis with potential as therapeutic target
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-MS/MS) LC-MS/MS analyses were carried out on an UPLC – Acquity system (Waters) coupled by electrospray ionization to an API3000 triple quadrupole LC-MS/MS mass spectrometer (Perkin-Elmer Sciex), using a Kinetex® 2.6 µm HILIC 100 Å column (150 × 4.6 mm, Phenomenex) for Glc-6P/GlcNAc-6P detection, and a an XBridge HILIC 5.0 µm, 130 Å (150 × 4.6 mm, Waters) for spermine/N -acetylspermine detection (see Supplementary Methods). .. CRISPR-Cas9 Pf GNA1-disruption and Pf GNA1-editing constructs Parasites were cultured and transfected either by electroporating ring-stage parasites or by nucleofection of schizont stages, as previously described .

    Gas Chromatography:

    Article Title: The Apicomplexa-specific glucosamine-6-phosphate N-acetyltransferase gene family encodes a key enzyme for glycoconjugate synthesis with potential as therapeutic target
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-MS/MS) LC-MS/MS analyses were carried out on an UPLC – Acquity system (Waters) coupled by electrospray ionization to an API3000 triple quadrupole LC-MS/MS mass spectrometer (Perkin-Elmer Sciex), using a Kinetex® 2.6 µm HILIC 100 Å column (150 × 4.6 mm, Phenomenex) for Glc-6P/GlcNAc-6P detection, and a an XBridge HILIC 5.0 µm, 130 Å (150 × 4.6 mm, Waters) for spermine/N -acetylspermine detection (see Supplementary Methods). .. CRISPR-Cas9 Pf GNA1-disruption and Pf GNA1-editing constructs Parasites were cultured and transfected either by electroporating ring-stage parasites or by nucleofection of schizont stages, as previously described .

    Chromatography:

    Article Title: AlkB homolog 3-mediated tRNA demethylation promotes protein synthesis in cancer cells
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) analyses were performed on a Waters ACQUITY UPLC system (Waters Corp., Milford, MA, USA) coupled to a Quattro Premier XE triple quadrupole mass spectrometer (Waters). .. LC separations were carried out on a COSMOSIL Cholester 2.5 μm, 2.0 × 100 mm column (Nacalai Tesque, Kyoto, Japan) at 50 °C, at a flow rate of 0.3 ml/min.

    Article Title: Electroacupuncture Relieves CCI-Induced Neuropathic Pain Involving Excitatory and Inhibitory Neurotransmitters
    Article Snippet: .. Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry (LC-ESI-MS) The LC-ESI-MS system consisted of an ultraperformance liquid chromatography (UPLC) system (ACQUITY UPLC I-Class, Waters) and an ESI/APCI source of 4 kDa quadrupole time-of-flight mass spectrometer (Waters VION, Waters). ..

    Article Title: Chronic photo-oxidative stress and subsequent MCP-1 activation as causative factors for age-related macular degeneration
    Article Snippet: .. Lipid extracts were re-dissolved in methanol:water (90:10) and liquid chromatography–electrospray ionization tandem mass spectrometry (LC–ESI–MS–MS) performed using a Prodigy ODS C18 column for separation of the lipids and the HPLC solvent system (Waters, Milford, MA). .. Mass spectrometric analyses were performed using ESI–MS–MS in the positive ion, multiple reaction monitoring (MRM) mode (cone energy 30 V, collision energy 25 eV).

    Article Title: The Apicomplexa-specific glucosamine-6-phosphate N-acetyltransferase gene family encodes a key enzyme for glycoconjugate synthesis with potential as therapeutic target
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-MS/MS) LC-MS/MS analyses were carried out on an UPLC – Acquity system (Waters) coupled by electrospray ionization to an API3000 triple quadrupole LC-MS/MS mass spectrometer (Perkin-Elmer Sciex), using a Kinetex® 2.6 µm HILIC 100 Å column (150 × 4.6 mm, Phenomenex) for Glc-6P/GlcNAc-6P detection, and a an XBridge HILIC 5.0 µm, 130 Å (150 × 4.6 mm, Waters) for spermine/N -acetylspermine detection (see Supplementary Methods). .. CRISPR-Cas9 Pf GNA1-disruption and Pf GNA1-editing constructs Parasites were cultured and transfected either by electroporating ring-stage parasites or by nucleofection of schizont stages, as previously described .

    Mass Spectrometry:

    Article Title: Comparison of bottom-up proteomic approaches for LC-MS analysis of complex proteomes
    Article Snippet: .. All samples were analyzed using liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) on a nano-Acquity ultra performance LC system (100x100 C18 BEH column, Waters) coupled to a Q-Exactive mass spectrometer (Thermo Fisher Scientific, Bremen, Germany). ..

    Article Title: AlkB homolog 3-mediated tRNA demethylation promotes protein synthesis in cancer cells
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) analyses were performed on a Waters ACQUITY UPLC system (Waters Corp., Milford, MA, USA) coupled to a Quattro Premier XE triple quadrupole mass spectrometer (Waters). .. LC separations were carried out on a COSMOSIL Cholester 2.5 μm, 2.0 × 100 mm column (Nacalai Tesque, Kyoto, Japan) at 50 °C, at a flow rate of 0.3 ml/min.

    Article Title: Electroacupuncture Relieves CCI-Induced Neuropathic Pain Involving Excitatory and Inhibitory Neurotransmitters
    Article Snippet: .. Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry (LC-ESI-MS) The LC-ESI-MS system consisted of an ultraperformance liquid chromatography (UPLC) system (ACQUITY UPLC I-Class, Waters) and an ESI/APCI source of 4 kDa quadrupole time-of-flight mass spectrometer (Waters VION, Waters). ..

    Article Title: Toward Noninvasive Diagnosis of IgA Nephropathy: A Pilot Urinary Metabolomic and Proteomic Study
    Article Snippet: .. The sample was then subjected to liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) analysis on a chromatographic column XTerra® MS (C18 50 × 1 mm × 3.5 mm) (Waters, Republic of Ireland), using an isocratic elution method with a mobile phase consisting of acetonitrile : water (60 : 40, v/v) with 0.1% formic acid. ..

    Article Title: The Dynamics of Plasma Membrane, Metabolism and Respiration (PM-M-R) in Penicillium ochrochloron CBS 123824 in Response to Different Nutrient Limitations—A Multi-level Approach to Study Organic Acid Excretion in Filamentous Fungi
    Article Snippet: .. For Liquid Chromatography Electrospray Ionization-tandem Mass Spectrometry (LC-ESI-MS/MS) analysis a nanoAcquity UHPLC (Waters) coupled to an LTQ-XL Orbitrap (Thermo) system was used as described (Vera et al., ), yet a 75 min gradient was employed: 0–5 min 99% solvent A (0.1% formic acid) and 1% solvent B (0.1% formic acid in 80% acetonitrile), 5–10 min 99–90% A, 10–59 min 90%−70% A, 59–60 min 60–1% A, 60–62 min 1% A, 62–75 min 99% A. .. The linear ion trap and the orbitrap were operated in sequence, i. e. after a full MS scan on the orbitrap at a resolution of 60,000 MS/MS spectra of the ten most intense precursors were detected in the ion trap.

    Article Title: Chronic photo-oxidative stress and subsequent MCP-1 activation as causative factors for age-related macular degeneration
    Article Snippet: .. Lipid extracts were re-dissolved in methanol:water (90:10) and liquid chromatography–electrospray ionization tandem mass spectrometry (LC–ESI–MS–MS) performed using a Prodigy ODS C18 column for separation of the lipids and the HPLC solvent system (Waters, Milford, MA). .. Mass spectrometric analyses were performed using ESI–MS–MS in the positive ion, multiple reaction monitoring (MRM) mode (cone energy 30 V, collision energy 25 eV).

    Article Title: Effects of the miR-143/-145 microRNA Cluster on the Colon Cancer Proteome and Transcriptome
    Article Snippet: .. Liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESIMS/ MS) was performed on a nanoAcquity ultra performance LC system (100 µm × 100 mm C18 BEH column) (Waters, Milford, MA) coupled to a LTQ Orbitrap Velos mass spectrometer (Thermo Fisher Scientific, Bremen, Germany). .. Peptides were eluted using a binary solvent system with 0.1% formic acid (A) and 0.1% formic acid in acetonitrile (B) with the following linear gradient: 10–40% B in 50 min, then washed at 85% B for 5 min and equilibrated with 1% B for 10 min at a 1200 nL/min flow rate.

    Article Title: The Apicomplexa-specific glucosamine-6-phosphate N-acetyltransferase gene family encodes a key enzyme for glycoconjugate synthesis with potential as therapeutic target
    Article Snippet: .. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-MS/MS) LC-MS/MS analyses were carried out on an UPLC – Acquity system (Waters) coupled by electrospray ionization to an API3000 triple quadrupole LC-MS/MS mass spectrometer (Perkin-Elmer Sciex), using a Kinetex® 2.6 µm HILIC 100 Å column (150 × 4.6 mm, Phenomenex) for Glc-6P/GlcNAc-6P detection, and a an XBridge HILIC 5.0 µm, 130 Å (150 × 4.6 mm, Waters) for spermine/N -acetylspermine detection (see Supplementary Methods). .. CRISPR-Cas9 Pf GNA1-disruption and Pf GNA1-editing constructs Parasites were cultured and transfected either by electroporating ring-stage parasites or by nucleofection of schizont stages, as previously described .

    Liquid Chromatography:

    Article Title: Comparison of bottom-up proteomic approaches for LC-MS analysis of complex proteomes
    Article Snippet: .. All samples were analyzed using liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) on a nano-Acquity ultra performance LC system (100x100 C18 BEH column, Waters) coupled to a Q-Exactive mass spectrometer (Thermo Fisher Scientific, Bremen, Germany). ..

    Article Title: Electroacupuncture Relieves CCI-Induced Neuropathic Pain Involving Excitatory and Inhibitory Neurotransmitters
    Article Snippet: .. Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry (LC-ESI-MS) The LC-ESI-MS system consisted of an ultraperformance liquid chromatography (UPLC) system (ACQUITY UPLC I-Class, Waters) and an ESI/APCI source of 4 kDa quadrupole time-of-flight mass spectrometer (Waters VION, Waters). ..

    Article Title: Toward Noninvasive Diagnosis of IgA Nephropathy: A Pilot Urinary Metabolomic and Proteomic Study
    Article Snippet: .. The sample was then subjected to liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) analysis on a chromatographic column XTerra® MS (C18 50 × 1 mm × 3.5 mm) (Waters, Republic of Ireland), using an isocratic elution method with a mobile phase consisting of acetonitrile : water (60 : 40, v/v) with 0.1% formic acid. ..

    Article Title: The Dynamics of Plasma Membrane, Metabolism and Respiration (PM-M-R) in Penicillium ochrochloron CBS 123824 in Response to Different Nutrient Limitations—A Multi-level Approach to Study Organic Acid Excretion in Filamentous Fungi
    Article Snippet: .. For Liquid Chromatography Electrospray Ionization-tandem Mass Spectrometry (LC-ESI-MS/MS) analysis a nanoAcquity UHPLC (Waters) coupled to an LTQ-XL Orbitrap (Thermo) system was used as described (Vera et al., ), yet a 75 min gradient was employed: 0–5 min 99% solvent A (0.1% formic acid) and 1% solvent B (0.1% formic acid in 80% acetonitrile), 5–10 min 99–90% A, 10–59 min 90%−70% A, 59–60 min 60–1% A, 60–62 min 1% A, 62–75 min 99% A. .. The linear ion trap and the orbitrap were operated in sequence, i. e. after a full MS scan on the orbitrap at a resolution of 60,000 MS/MS spectra of the ten most intense precursors were detected in the ion trap.

    Article Title: Effects of the miR-143/-145 microRNA Cluster on the Colon Cancer Proteome and Transcriptome
    Article Snippet: .. Liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESIMS/ MS) was performed on a nanoAcquity ultra performance LC system (100 µm × 100 mm C18 BEH column) (Waters, Milford, MA) coupled to a LTQ Orbitrap Velos mass spectrometer (Thermo Fisher Scientific, Bremen, Germany). .. Peptides were eluted using a binary solvent system with 0.1% formic acid (A) and 0.1% formic acid in acetonitrile (B) with the following linear gradient: 10–40% B in 50 min, then washed at 85% B for 5 min and equilibrated with 1% B for 10 min at a 1200 nL/min flow rate.

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    Waters Corporation esi ms analysis lc
    Site-specific incorporation of DiZHSeC into proteins in E. coli . ( a ) Immunoblotting analysis shows similar amber suppression efficiency of the DiZPK-recognizing PylRS mutant for DiZPK and DiZHSeC when they are inserted to N149 position of <t>GFP</t> (GFP-N149TAG). (The representative result from three replicates are shown). ( b ) The molecular weight of GFP-N149DiZHSeC is measured by <t>ESI-MS</t> as 27944 Da (calculated 27941 Da). (The representative result from two replicates is shown). ( c ) DiZHSeC and DiZPK show similar photocrosslinking efficiency on the model protein HdeA. E. coli cells expressing the periplasm-residing HdeA-V58DiZPK or HdeA-V58DiZHSeC protein (carrying a C-terminal His tag) were incubated at pH 2.3 for 30 min followed by ultraviolet irradiation at 365 nm. Cell extracts are separated by the SDS–PAGE gel and analysed by anti-His immunoblotting. The HdeA monomer is marked with a black arrow and the crosslinked complexes are marked with a black brace. (The representative result from three replicates is shown).
    Esi Ms Analysis Lc, supplied by Waters Corporation, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/esi ms analysis lc/product/Waters Corporation
    Average 90 stars, based on 1 article reviews
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    esi ms analysis lc - by Bioz Stars, 2020-09
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    91
    Waters Corporation hplc esi ms
    Selected ion-monitoring traces from the same individual corresponding to (A+6) + and (A+2) + isotopes of the glucose butyl-PABA derivative analyzed by <t>HPLC-ESI-MS</t> and UPLC-ESI-MS at times t = 0 and t = 5 min.
    Hplc Esi Ms, supplied by Waters Corporation, used in various techniques. Bioz Stars score: 91/100, based on 16 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/hplc esi ms/product/Waters Corporation
    Average 91 stars, based on 16 article reviews
    Price from $9.99 to $1999.99
    hplc esi ms - by Bioz Stars, 2020-09
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    88
    Waters Corporation electrospray ionization triple quadruple mass spectrometer
    Representative of liquid <t>chromatography-electrospray</t> ionization mass spectrometry (LC-ESI-MS) selected ion chromatogram ( m / z = 353) of vTP+ vessels incubated in HEPES buffer with and without angiotensin II [0.1 μM; aorta ( A ) or mesentery artery
    Electrospray Ionization Triple Quadruple Mass Spectrometer, supplied by Waters Corporation, used in various techniques. Bioz Stars score: 88/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    Waters Corporation uplc esi qtof ms
    Results of <t>UPLC-ESI-Q-TOF-MS</t> analysis for COS. The protein was reduced with DTT, alkylated with iodoacetamide, digested with porcine trypsin and analyzed by LC–MS. (A) Extracted ion currents (XIC) at m/z =578.9232 corresponding to the peptide FHNNYTSSPL C APAR [M+3H] +3 with the carbamidomethylated Cys54. (B) Mass spectra of the same peptide (theoretical weight=1734.8016 Da and [M+3H] +3 =578.9387).
    Uplc Esi Qtof Ms, supplied by Waters Corporation, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/result/uplc esi qtof ms/product/Waters Corporation
    Average 90 stars, based on 1 article reviews
    Price from $9.99 to $1999.99
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    Site-specific incorporation of DiZHSeC into proteins in E. coli . ( a ) Immunoblotting analysis shows similar amber suppression efficiency of the DiZPK-recognizing PylRS mutant for DiZPK and DiZHSeC when they are inserted to N149 position of GFP (GFP-N149TAG). (The representative result from three replicates are shown). ( b ) The molecular weight of GFP-N149DiZHSeC is measured by ESI-MS as 27944 Da (calculated 27941 Da). (The representative result from two replicates is shown). ( c ) DiZHSeC and DiZPK show similar photocrosslinking efficiency on the model protein HdeA. E. coli cells expressing the periplasm-residing HdeA-V58DiZPK or HdeA-V58DiZHSeC protein (carrying a C-terminal His tag) were incubated at pH 2.3 for 30 min followed by ultraviolet irradiation at 365 nm. Cell extracts are separated by the SDS–PAGE gel and analysed by anti-His immunoblotting. The HdeA monomer is marked with a black arrow and the crosslinked complexes are marked with a black brace. (The representative result from three replicates is shown).

    Journal: Nature Communications

    Article Title: Genetically encoded protein photocrosslinker with a transferable mass spectrometry-identifiable label

    doi: 10.1038/ncomms12299

    Figure Lengend Snippet: Site-specific incorporation of DiZHSeC into proteins in E. coli . ( a ) Immunoblotting analysis shows similar amber suppression efficiency of the DiZPK-recognizing PylRS mutant for DiZPK and DiZHSeC when they are inserted to N149 position of GFP (GFP-N149TAG). (The representative result from three replicates are shown). ( b ) The molecular weight of GFP-N149DiZHSeC is measured by ESI-MS as 27944 Da (calculated 27941 Da). (The representative result from two replicates is shown). ( c ) DiZHSeC and DiZPK show similar photocrosslinking efficiency on the model protein HdeA. E. coli cells expressing the periplasm-residing HdeA-V58DiZPK or HdeA-V58DiZHSeC protein (carrying a C-terminal His tag) were incubated at pH 2.3 for 30 min followed by ultraviolet irradiation at 365 nm. Cell extracts are separated by the SDS–PAGE gel and analysed by anti-His immunoblotting. The HdeA monomer is marked with a black arrow and the crosslinked complexes are marked with a black brace. (The representative result from three replicates is shown).

    Article Snippet: ESI-MS analysis LC–MS analysis of GFP-N149DiZHSeC was performed using a Waters ACQUITY UPLC I-Class SQD 2 mass spectrometer with ESI.

    Techniques: Mutagenesis, Molecular Weight, Mass Spectrometry, Expressing, Incubation, Irradiation, SDS Page

    Selected ion-monitoring traces from the same individual corresponding to (A+6) + and (A+2) + isotopes of the glucose butyl-PABA derivative analyzed by HPLC-ESI-MS and UPLC-ESI-MS at times t = 0 and t = 5 min.

    Journal: Clinical chemistry

    Article Title: A Convenient LC-MS Method for Assessment of Glucose Kinetics In Vivo with D-[13C6]Glucose as a Tracer

    doi: 10.1373/clinchem.2008.113654

    Figure Lengend Snippet: Selected ion-monitoring traces from the same individual corresponding to (A+6) + and (A+2) + isotopes of the glucose butyl-PABA derivative analyzed by HPLC-ESI-MS and UPLC-ESI-MS at times t = 0 and t = 5 min.

    Article Snippet: Attempts to analyze glucose directly by HPLC-ESI-MS were unsatisfactory (results not shown), but its conversion to the butyl-PABA derivative, which is performed in a single step, afforded a derivative with excellent characteristics for HPLC-ESI-MS.

    Techniques: High Performance Liquid Chromatography, Mass Spectrometry

    Representative of liquid chromatography-electrospray ionization mass spectrometry (LC-ESI-MS) selected ion chromatogram ( m / z = 353) of vTP+ vessels incubated in HEPES buffer with and without angiotensin II [0.1 μM; aorta ( A ) or mesentery artery

    Journal: American Journal of Physiology - Heart and Circulatory Physiology

    Article Title: Role of superoxide and thromboxane receptors in acute angiotensin II-induced vasoconstriction of rabbit vessels

    doi: 10.1152/ajpheart.01135.2010

    Figure Lengend Snippet: Representative of liquid chromatography-electrospray ionization mass spectrometry (LC-ESI-MS) selected ion chromatogram ( m / z = 353) of vTP+ vessels incubated in HEPES buffer with and without angiotensin II [0.1 μM; aorta ( A ) or mesentery artery

    Article Snippet: To further characterize products, MS/MS analysis was performed by electrospray ionization triple quadruple mass spectrometer (Waters).

    Techniques: Liquid Chromatography, Mass Spectrometry, Incubation

    Results of UPLC-ESI-Q-TOF-MS analysis for COS. The protein was reduced with DTT, alkylated with iodoacetamide, digested with porcine trypsin and analyzed by LC–MS. (A) Extracted ion currents (XIC) at m/z =578.9232 corresponding to the peptide FHNNYTSSPL C APAR [M+3H] +3 with the carbamidomethylated Cys54. (B) Mass spectra of the same peptide (theoretical weight=1734.8016 Da and [M+3H] +3 =578.9387).

    Journal: Biochemistry and Biophysics Reports

    Article Title: Choline sulfatase from Ensifer (Sinorhizobium) meliloti: Characterization of the unmodified enzyme

    doi: 10.1016/j.bbrep.2015.08.002

    Figure Lengend Snippet: Results of UPLC-ESI-Q-TOF-MS analysis for COS. The protein was reduced with DTT, alkylated with iodoacetamide, digested with porcine trypsin and analyzed by LC–MS. (A) Extracted ion currents (XIC) at m/z =578.9232 corresponding to the peptide FHNNYTSSPL C APAR [M+3H] +3 with the carbamidomethylated Cys54. (B) Mass spectra of the same peptide (theoretical weight=1734.8016 Da and [M+3H] +3 =578.9387).

    Article Snippet: The eluted sample was analyzed by UPLC-ESI-QTOF-MS (nanoACQUITY-Waters – SYNAPT G2S Waters).

    Techniques: Mass Spectrometry, Liquid Chromatography with Mass Spectroscopy