cycloalkene mass spectrometry
cycloalkene mass spectrometry, Total:155 items.
The international standard classification for "cycloalkene mass spectrometry" includes: General methods of tests and analysis for food products , Cosmetics. Toiletries , Sugar and sugar products , Ambient atmospheres , Fertilizers , Geology. Meteorology. Hydrology , food products in general , Rubber , Meat, meat products and other animal produce , Tobacco, tobacco products and related equipment , Surface active agents , Leather and furs .
The Chinese standard classification for "cycloalkene mass spectrometry" includes: Basic standards and general methods , Cosmetics , Beekeeping, silkworm keeping , Sugar refining , Analysis methods for toxic substances in atmosphere , Basic standards and general methods on chemical fertilizers , Analysis methods for substances in ocean , Rubber products in general , Tobacco , Tooth paste, soap and detergent , Furs and leathers , Aquatic product and fishery in general , Tobacco curing in general .
Professional Standard - Petrochemical Industry
- SH/T 1840-2023 Determination of the content of polycyclic aromatic hydrocarbons in oil-extended styrene-butadiene rubber(SBR)— Gas chromatography-mass spectrum method
National Health Commission of the People's Republic of China
- GB 23200.52-2016 National food safety standard―Determination of cyprodinil residue in foods Gas chromatography-mass spectrometry
- GB 23200.62-2016 National food safety standard―Determination of flumiclorac-pentyl residue in foods Gas chromatography-mass spectrometry
- GB 23200.37-2016 National food safety standard―Determination of residue of 20 pesticides including nitenpyram, dinotefuran etc in foods Liquid chromatography-tandem mass spectrometry
- GB 23200.30-2016 National food safety standard―Determination of cyflufenamid residue in foods Gas chromatography-mass spectrometry
- GB 23200.38-2016 National food safety standard―Determination of cyclohexanedione herbicides residue in plant-derived foods Liquid chromatography-mass spectrometry
- GB 23200.49-2016 National food safety standard―Determination of difenoconazole residue in foods Gas chromatography-mass spectrometry
Professional Standard - Commodity Inspection
- SN/T 2800-2011 Determination of Tetracyclines Residues in Royal Jelly for Import and Export - HPLC-MS/MS Method
- SN/T 4031-2014 Determination of acrylamide monomer residues in cosmetics for export - LC-MS/MS method
- SN/T 0520-2012 Determination of imazalil in cereals for export. HPLC-MS/MS method
- SN/T 1948-2007 Determination of sodium cyclamate in foods for import and export - HPLC-MS/MS method
- SN/T 3342-2012 Determination of residual monomers in acrylic resin-Gas chromatography-mass spectrometry
- SN/T 2451-2010 Determination of Sodium Nifurstyrenate Residues in Food of Animal Origin - LC-MS/MS Method
- SN/T 1877.7-2010 Determination of polycyclic aromatic hydrocarbons in used tyres—Gas chromatography-mass spectrometry
- SN/T 3525-2013 Determination of styrene in adhesives used in buiding for import and export-Gas chromatography-mass spectrometry
- SN/T 3998-2014 Determination of hexabromocyclododecane in coatings - Gas chromatography-mass spectrometry
- SN/T 3018-2011 Determination of hexabromocyclododecane (HBCD) in plastics and plastics articles - Liquid chromatography-tandem mass spectrometry
- SN/T 3035-2011 Determination of cyclohexanedione herbicides residues in food origined from plant for export-LC-MS/MS method
- SN/T 2926-2011 Determination of Polycyclic Aromatic Hydrocarbons in Shoe Materials - Gas Chromatography-mass Spectrometry Method
- SN/T 4140-2015 Determination of heterocyclic amines in fish sausage and essence for export - LC-MS/MS method
- SN/T 3481.1-2013 Food contact materials - Polymer materials - Determination for hexabromocyclododecane - Part 1: Liquid chromatography(LC) - mass spectrometry(MS)/MS method
- SN/T 3137-2012 Determination of deoxynivalenol,3-acetyl-deoxynivalenol,15-O-acetyl-4-deoxynivalenol and their metabolite in food for export-LC-MS/MS method
- SN/T 3823-2014 Test method of polycyclic aromatic hydrocarbon in cosmetics - Gas chromatography-Mass spectrography
- SN/T 0604-2014 Inspection of durene residues in vegetables for export - GC-MS method
- SN/T 3543-2013 Determination of hexabromocyclododecane (HBCD) in food for export - Liquid chromatography-tandem mass spectrometry method
- SN/T 3508-2013 Determination of hexabromocyclododecane in import and export textiles-Liquid chromatography tandem mass spectrometry method
- SN/T 2459-2010 Determination of Flumiclorac-pentyl Residues in Food for Import and Export - GC-MS Method
Shaanxi Provincial Standard of the People's Republic of China
- DB61/T 563-2013 Water Quality Determination of Acrylamide by High Performance Liquid Chromatography-Mass Spectrometry/Mass Spectrometry
Jilin Provincial Standard of the People's Republic of China
- DB22/T 1618-2012 Determination of Zearalenone in Feed by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry
- DB22/T 2684-2017 Determination of boscalid and boscalid residues in rice Gas Chromatography-Mass Spectrometry/Mass Spectrometry
- DB22/T 1697-2012 Determination of Nifurene Hydrazone in Feeds by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry
- DB22/T 1987-2013 Determination of diethylstilbestrol in feed by liquid chromatography-mass spectrometry/mass spectrometry
- DB22/T 2466-2016 Determination of Propiconazole Residues in Soil by Gas Chromatography-Mass Spectrometry
Liaoning Provincial Standard of the People's Republic of China
- DB21/T 3110-2019 Determination of Acrylamide in Water by High Performance Liquid Chromatography-Mass Spectrometry
- DB21/T 3287-2020 Water Quality Determination of Acrolein by High Performance Liquid Chromatography
Shandong Provincial Standard of the People's Republic of China
- DB37/T 4145-2020 Water Quality Determination of Acrylamide by Liquid Chromatography-Tandem Mass Spectrometry
- DB37/T 4151-2020 Determination of Acrylic Acid in Water by Ion Chromatography
- DB37/T 4158-2020 Determination of Water Quality Environmental Hormone Compounds by Solid Phase Extraction-Liquid Chromatography-Tandem Mass Spectrometry
Guangdong Provincial Standard of the People's Republic of China
- DB44/T 938-2011 Identification of ethylene-octene copolymer and determination of octene content by pyrolysis gas chromatography-mass spectrometry
海关总署
- SN/T 5168-2019 Determination of oxymetholone in animal- -origin foodstuffs for export--LC-MS/ MS method
Group Standards of the People's Republic of China
- T/ZNZ 027-2020 Determination of squalene in edible vegetable oil by gas chromatography-tandem mass spectrometry
- T/CI 088-2022 Determine Method of 4-hydroxy-2-hexenal and 4-hydroxy-2-nonenal in Dried Fish Products LC-MS/MS
- T/CNTAC 152-2023 Textiles—Screening method of methylsiloxanes—Pyrolysis-gas chromatography-mass spectrometry method
- T/FQIA 003-2022 Determination of pesticide residues of chlornitrofen,fluoronitrofen, 2,4-dichlorophenyl benzenesulfonate, cycloprate, kinoprene and hydroprene in tea by gas chromatography-tandem mass spectrometry
- T/GQBCXH 7-2024 Determination of tetracycline in bovine muscles by Liquid Chromatography-tandem mass spectrometry
- T/CPPIA 6-2021 Determination of Hexabromocyclododecane in Expanded Polystyrene and Extruded Polystyrene--Gas Chromatography-Mass Spectrometry
- T/GDCKCJH 070-2022 Determination of hexachloroprene (HCBD) in polymers—Gas chromatography-mass spectrometry (GC-MS)
- T/LNUWA 010-2023 Water quality-Determination of epichlorohydrin Purge– and trap/gas chromatography-mass spectrometer
- T/CIESC 0020-2022 Standard Test Method for Arsine and Phosphine in Polymer Grade Ethylene and Propylene by Gas Chromatography-Mass Spectrometry
- T/GXAS 004-2017 Gas Chromatographic Analysis Method of Longifolene in Heavy Turpentine Oil
- T/GXAS 003-2017 Gas chromatography analysis method of caryophyllene in heavy turpentine
- T/SXITS 0002-2021 Determination of 16 Polycyclic Aromatic Hydrocarbons Residues in Chinese Medicinal Materials by Gas Chromatography-Mass Spectrometry
- T/GDFDTAEC 04-2022 Determination of Divinylbenzene residue in Plant extract Gas chromatography-Mass spectrometr
国家质量监督检验检疫总局
- SN/T 4673-2016 Determination of ethephon,thidiazuron,diuron pesticides residues in cotton for import and export―Liquid chromatography-tandem mass spectrometry method
- SN/T 1114-2014 Determination of diniconazole residue in fruits for export - HPLC-MS/MS method
- SN/T 4747.3-2017 Determination of macrolide residues of live animals for import and export-LC-MS/MS
- SN/T 4440-2016 Determination of trichloroethylene and tetrachloroethylene in plastic and rubber products - Gas chromatongrahpy-mass spectrometry
- SN/T 0683-2014 Determination of tricyclazole residues in cereals for export - HPLS-MS/MS method
- SN/T 4423-2016 Textiles一Determination of vinyl chloride in polyvinyl chloride coating materials一Headspace gas chromatography-mass spectrometry
- SN/T 4814-2017 Determination of the tecycline medicine residuse of live animals for import and export-LC-MS-MS method
- SN/T 4156-2015 Determination of divinyl benzene in the imported and exported polystyrene poke-Gas chromatography-mass spectrometry
- SN/T 4522-2016 Determination of residue of ethephon in tomato products for export--LC-MS/MS method
- SN/T 4683-2016 Determination of formamide in ethylene-vinyl acetate copolymer and its products―Gas chromatography-Mass method
工业和信息化部
- SH/T 1830-2020 Determination of nonylphenols content in acrylonitrile-butadlene rubber— Gas chromatography-mass spectrometry(GC-MS)
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 32952-2016 Fertilizers - Determination of polycyclic aromatic hydrocarbons - Gas chromatography - mass spectrometry
- GB/T 43448-2023 Determination of 17-pentatriacontene in honey—Gas chromatography mass spectrometry method
- GB/T 23213-2008 Determination of polycyclic aromatic hydrocarbons in vegetable oils - GC-MS method
- GB/T 23405-2009 Determination of sodium cyclamate in bee products—LC-MS/MS method
- GB/T 26411-2010 Determination of 16 polynuclear aromatic hydrocarbons in seawater by GC-MS
- GB/T 14670-1993 Air quality-Determination of styrene-Gas chromatography
- GB/T 5009.204-2005 GC-MS method for determination of acrylamide in food
- GB/T 29672-2013 Determination of acrylonitrile in cosmetics—Gas chromatography-mass spectrometry
- GB/T 21982-2008 Determination of residues of zearalanol β-zearalanol α-zearalenol β-zearalenol zearalanone and zearalenone in food of animal origin - LC-MS/MS method
- GB/T 27523-2011 Cigarettes—Determination of volatile organic compounds(1,3-butadiene,isoprene,acrylonitrile,benzene,toluene) in mainstream smoke—GC-MS method
- GB/T 29616-2013 Thermoplastic elastomer—Determination of polycyclic aromatic hydrocarbons—Gas chromatography-mass spectrometry
- GB/T 23408-2009 Determination of macrolides residues in honey—LC-MS/MS method
- GB/T 23409-2009 Determination of residues of oxytetracycline, tetracycline,chlortetracycline, and doxycycline in royal jelly—LC-MS/MS method
- GB/T 21317-2007 Determination of tetracyclines residues in food of animal origin—LC-MS/MS method and HPLC method
Anhui Provincial Standard of the People's Republic of China
- DB34/T 2994-2017 Determination of 18 Polycyclic Aromatic Hydrocarbons in Carbon Black by Gas Chromatography-Mass Spectrometry
- DB34/T 1368-2011 Determination of diethylstilbestrol in feed-Gas chromatography mass spectrometry method
- DB34/T 1766-2012 Determination of Nifurene Hydrazone in Feeds by Liquid Chromatography-Tandem Mass Spectrometry
- DB34/T 3304-2018 Determination of 16 Polycyclic Aromatic Hydrocarbons in Chinese Herbal Medicines by Gas Chromatography-Mass Spectrometry
Professional Standard - Environmental Protection
- HJ 900-2017 Ambient air - Determination of organochlorine pesticides - Gas chromatography/mass spectrometry method
- HJ/T 73-2001 Water quality - Determination of Acrylonitrile-Gas chromatography
- HJ 697-2014 Water Quality - Determination of Acrylamide - Gas Chromatography Method
- HJ 805-2016 Soil and Sediment - Determination of polycyclic aromatic hydrocarbon by gas chromatography - mass spectrometry method
- HJ 950-2018 Solid waste - Determination of polycyclic aromatic hydrocarbon - Gas chromatography mass spectrometry
- HJ 739-2015 Ambient air - Determination of nitroaromatics - Gaschromatography mass spectrometry
- HJ 806-2016 Water quality - Determination of acrylonitrile and acrolein - Purge and trap/gas chromatography
- HJ 646-2013 Ambient air and stationary source emissions - Determination of gas and particle-phase polycyclic aromatic hydrocarbons with gas chromatography/mass spectrometry
- HJ 902-2017 Ambient air - Determination of polychlorinated biphenyls - Gas chromatography/mass spectrometry method
- HJ 852-2017 Ambient air - Determination of indicative toxaphene - Gas chromatography mass spectrometry
- HJ 867-2017 Ambient air - Determination of phthalate esters - Gas chromatography/mass spectrometry
Professional Standard - Agriculture
- GB/T 44364-2024 Determination of acrylamide in toothpaste—High performance liquid chromatography tandem mass spectrometry
- NY/T 4359-2023 Determination of sixteen polycyclic aromatic hydrocarbons in feeds-Gas chromatography mass spectrometry(GC-MS)
- HJ 1288-2023 Water quality-Determination of acrylic acid-Ion chromatography
- SN/T 5503-2023 Determination of vinyl acetate in cosmetics for import and export-Headspace gas chromatography-mass spectrometry method
- SL 748-2017 Determination of acrolein, acrylonitrile and acetaldehyde in water by purge and trap-gas chromatography
- HJ 1288-2023 Water quality-Determination of acrylic acid-Ion chromatography
Jinlin Provincial Food Standard of the People's Republic of China
- DBS22/ 014-2013 Determination of sodium cyclamate in dairy products and beverages containing milk by liquid chromatography-mass spectrometry/mass spectrometry
- DBS22/ 005-2013 Local Food Safety Standards Determination of α-zearalenol and erythralenone in plant-derived foods by liquid chromatography-mass spectrometry-mass spectrometry
- DBS22/ 013-2013 Local Food Safety Standards Determination of α-zearalenol and erythralenone in plant-derived foods by liquid chromatography-mass spectrometry/mass spectrometry
Chongqing Provincial Standard of the People's Republic of China
- DB50/T 1363-2023 Water Quality Determination of Tetracycline Antibiotics by Liquid Chromatography-Tandem Mass Spectrometry
Agricultural Standard of the People's Republic of China
- 农业部1031号公告-4-2008 Determination of diethylstibestrol in chicken muscle and liver Gas chromatography-mass spectrometry method
- 农业部1163号公告-9-2009 Determination of diethylstilbestrol residues in fishery products Gas chromatography-mass spectrometry method
未注明发布机构
- DIN 10785:2012-10 Analysis of coffee and coffee products - Determination of acrylamide - Methods using HPLC-MS/MS and GC-MS after derivatization
- DIN ISO 18287 E:2004-01 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS)
- DIN CEN/TS 17083:2017*DIN SPEC 10808:2017 Foodstuffs - Determination of acrylamide in food and coffee by gas chromatography-mass spectrometry (GC-MS)
Professional Standard - Water Conservancy
- SL/T 748-2017 Water quality – Determination of acrolein, acrylonitrile and acetaldehyde-Purge and trap/gas chromatography
农业农村部
- NY/T 3904-2021 Determination of heterocyclic amines in meat and meat products by liquid chromatography-tandem mass spectrometry method
国家市场监督管理总局、中国国家标准化管理委员会
- GB/T 36946-2018 Leather—Chemical tests—Determination of polycyclic aromatic hydrocarbons—Gas chromatography-mass spectrometry
Professional Standard - Aquaculture
- SC/T 3042-2008 Determination of specified sixteen polycyclic aromatic hydrocarbons in aquatic products by gas chromatography-mass spectrum
Sichuan Provincial Standard of the People's Republic of China
- DB51/T 2005-2015 Determination of Propylene Oxide in Cleansing Cosmetics by Gas Chromatography-Mass Spectrometry
Professional Standard - Tobacco
- YC/T 540-2016 Cigarettes. Determination of ethylene oxide and propylene oxide in mainstream cigarette smoke. Gas chromatography-mass spectrometry method
- YC/T 411-2011 Determination of acrylates and methacrylates in water-borne adhesives applied on polypropylene tow for making cigarette filter rod—Gas chromatography-mass spectrometry method
American Society for Testing and Materials (ASTM)
- ASTM UOP1015-17 Determination of Trace Oxygenates in Polymer Grade Ethylene & Propylene by Gas Chromatography Mass Spectrometry
- ASTM UOP1043-20 Determination of Trace Acetonitrile and Propionitrile in Polymer Grade Ethylene and Propylene by Gas Chromatography Mass Spectrometry
- ASTM UOP913-92 Impurities in Styrene by Gas Chromatography
- ASTM UOP1035-19 Determination of Trace Chloromethane, Chloroethene, and Dichloromethane in Polymer Grade Ethylene and Propylene by Gas Chromatography Mass Spectrometry
- ASTM UOP1022-18 Determination of Trace Carbonyl Sulfide and Hydrogen Sulfide in Polymer Grade Ethylene and Propylene by Gas Chromatography Mass Spectrometry
- ASTM UOP1023-18 Determination of Trace Arsine and Phosphine in Polymer Grade Ethylene & Propylene by Gas Chromatography Mass Spectrometry
- ASTM UOP1021-17 Determination of Trace Methyl and Ethyl Mercaptan in Polymer Grade Ethylene & Propylene by Gas Chromatography Mass Spectrometry
KR-KS
- KS I ISO 18287-2018(2024) Soil quality — Determination of polycyclic aromatic hydrocarbons(PAH) — Gas chromatographic method with mass spectrometric detection(GC-MS)
- KS I ISO 18287-2018 Soil quality — Determination of polycyclic aromatic hydrocarbons(PAH) — Gas chromatographic method with mass spectrometric detection(GC-MS)
GSO
- GSO ISO 18287:2013 Soil quality -- Determination of polycyclic aromatic hydrocarbons (PAH) -- Gas chromatographic method with mass spectrometric detection (GC-MS)
- GSO ISO 28540:2013 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
- BH GSO ISO 28540:2016 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
- OS GSO ISO 28540:2013 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
Korean Agency for Technology and Standards (KATS)
- KS M 3308-2021 Test method for residual vinyl chloride monomer content of poly vinyl chloride by gas chromatography/mass spectrometer
- KS M 3308-2016 Test method for residual vinyl chloride monomer content of poly vinyl chloride by gas chromatography/mass spectrometer
- KS I ISO 18287:2018 Soil quality — Determination of polycyclic aromatic hydrocarbons(PAH) — Gas chromatographic method with mass spectrometric detection(GC-MS)
- KS M 3308-2016(2021) Test method for residual vinyl chloride monomer content of poly vinyl chloride by gas chromatography/mass spectrometer
- KS M 1960-2002(2012) Ethylene for industrial use-Determination of hydrocarbon impurities-Gas chromatographic method
- KS M 1938-2009 Butadiene for industrial use-Determination of hydrocarbon impurities-Gas chromatographic method
- KS I ISO 18287:2007 Soil quality-Determination of polycyclic aromatic hydrocarbons(PAH)- Gas chromatographic method with mass spectrometric detection(GC-MS)
- KS M 1960-2013 Ethylene for industrial use-Determination of hydrocarbon impurities-Gas chromatographic method
- KS M 1961-2002(2007) Propylene for industrial use-Determination of hydrocarbon impurities-Gas chromatographic method
PL-PKN
- PN Z04198-02-1988 Air purity protection Tests for vinylcyclohexene dioxide Determination of vinylcyclohexene dioxide in work places by gas chromatography with sample enrichment
- PN Z04163-02-1986 Air purity protection ests for cyklohexene etermination of cyklohexene n work places by gas chromatography ith sample enrichment
SCC
- DANSK DS/ISO 18287:2006 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS)
- DANSK DS/ISO 28540:2011 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
- NS-ISO 28540:2011 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
- BS PD CEN/TS 17083:2017 Foodstuffs. Determination of acrylamide in food and coffee by gas chromatography-mass spectrometry (GC-MS)
Danish Standards Foundation
- DS/ISO 18287:2007 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS)
- DS/ISO 28540:2011 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAH) in water - Method using gas chromatography with mass spectrometric detection (GC-MS)
Association Francaise de Normalisation
- NF ISO 18287:2006 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAHs) - Gas chromatography method with mass spectrometry detection (GC-MS)
- NF ISO 28540:2011 Water quality - Determination of 16 polycyclic aromatic hydrocarbons (PAHs) in water - Gas chromatography method with mass spectrometry detection (GC-MS)
- NF X31-170*NF ISO 18287:2006 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (CG-MS).
International Organization for Standardization (ISO)
- ISO 18287:2006 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS)
- ISO 6379:1981 Ethylene for industrial use; Determination of hydrocarbon impurities; Gas chromatographic method
- ISO 6380:1981 Propylene for industrial use; Determination of hydrocarbon impurities; Gas chromatographic method
German Institute for Standardization
- DIN 10785:2013 Analysis of coffee and coffee products - Determination of acrylamide - Methods using HPLC-MS/MS and GC-MS after derivatization
- DIN ISO 18287:2006 Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS) (ISO 18287:2006) English version of DIN ISO 18287:2006-05
- DIN CEN/TS 17083:2017-09*DIN SPEC 10808:2017-09 Foodstuffs - Determination of acrylamide in food and coffee by gas chromatography-mass spectrometry (GC-MS); German version CEN/TS 17083:2017
British Standards Institution (BSI)
- 20/30410986 DC BS EN 17503. Environmental solid matrices. Determination of polycyclic aromatic hydrocarbons (PAH) by gas chromatography (GC) and high performance liquid chromatography (HPLC)
Mass spectrometric detection method for ciclopirox olamine,tetracycline mass spectrometry,Epoxy Mass Spectrometry,Epoxy+MS+,Determination of hexabromocyclododecane in electrical and electronic products by gas chromatography-mass spectrometry,Cyclosporine Mass Spectrometry,Tetracycline HPLC-MS,Ciclopirox Mass Spectrometry,Loop + MS,Detection of Polycyclic Aromatic Hydrocarbons by Gas Chromatography and Mass Spectrometry,cycloalkene mass spectrometry,PAH liquid chromatography mass spectrometry,Naphthalene Ring Mass Spectrometry