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DEPetroleum UV Curve
Petroleum UV Curve, Total:208 items.
In the international standard classification, Petroleum UV Curve involves: Products of the chemical industry, Fuels, Petroleum products in general, Edible oils and fats. Oilseeds, Analytical chemistry, Waxes, bituminous materials and other petroleum products, Vocabularies, Lamps and related equipment, Radiation measurements, Lighting, Lubricants, industrial oils and related products, Sterilization and disinfection, Geology. Meteorology. Hydrology, Wastes, Equipment for petroleum and natural gas industries, Medical equipment, Domestic electrical appliances in general, Body care equipment, Products of the textile industry, Construction materials, Inks. Printing inks, Glass, Inorganic chemicals, Non-destructive testing.
Association Francaise de Normalisation, Petroleum UV Curve
- NF T75-122:1982 ESSENTIAL OILS. OILS OF CITRUS. DETERMINATION OF CD VALUE BY ULTRAVIOLET SPECTROPHOTOMETRIC ANALYSIS.
- NF M07-059:1990 Petroleum products. Determination of sulfur in petroleum products. Combustion and detection by ultraviolet fluorescence.
- NF M07-109*NF EN ISO 20846:2004 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
- NF M07-109*NF EN ISO 20846:2011 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
- NF T60-223/A1*NF EN ISO 3656/A1:2017 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction - Amendment 1
- NF T60-607:1998 Produits pétroliers et lubrifiants - Détermination de l'indice d'absorption UV de l'extrait DMSO des huiles de coupe entières
- NF EN 17178:2019 Liquid petroleum products - Determination of volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- NF M41-027*NF EN 17178:2019 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- NF T60-223*NF EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction.
- NF EN ISO 20846:2019 Petroleum products - Determination of sulfur content of automobile fuels - Ultraviolet fluorescence method
- NF M07-109*NF EN ISO 20846:2019 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
- NF C72-228:1995 Method of measuring and specifying the uv-radiation of ultraviolet lamps used for sun-tanning.
- NF T75-122*NF ISO 4735:2002 Oils of Citrus - Determination of CD value by ultraviolet spectrometric analysis.
- NF M07-073:2001 Petroleum products - Determination of the content of total aromatic hydrocarbons in saturated fractions - Ultra-Violet absorbance spectrometric method for low contents.
American Welding Society (AWS), Petroleum UV Curve
RU-GOST R, Petroleum UV Curve
AWS - American Welding Society, Petroleum UV Curve
- ULR-1976 ULTRAVIOLET REFLECTANCE OF PAINT
Japanese Industrial Standards Committee (JISC), Petroleum UV Curve
- JIS K 2541-6:2013 Crude petroleum and petroleum products.Determination of sulfur content Part 6: Ultraviolet fluorescence method
- JIS K 2541-6:2003 Crude oil and petroleum products -- Determination of sulfur content Part 6: Ultraviolet fluorescence method
- JIS T 2001:2005 Ultraviolet and Infra-red therapy apparatus for home use
Professional Standard - Petrochemical Industry, Petroleum UV Curve
- SH/T 0415-1992 Test method for ultraviolet absorbance value of petroleum products
PT-IPQ, Petroleum UV Curve
GOST, Petroleum UV Curve
- GOST ISO 20846-2012 Petroleum products. Determination of sulfur content by ultraviolet fluorescence method
CZ-CSN, Petroleum UV Curve
- CSN 65 7112-1974 Determination of the light fastness oí paraffin waxes on UV light.
GOSTR, Petroleum UV Curve
- GOST 34237-2017 Petroleum products. Determination of total sulfur by method ultraviolet fluorescence
- GOST ISO 20846-2016 Liquid petroleum products. Determination of sulfur content of automotive fuels. Ultraviolet fluorescence method
IN-BIS, Petroleum UV Curve
- IS 1448 Pt.105-1981 Test methods for petroleum and its products [P: 105] Ultraviolet (UV) absorption and absorbance of petroleum products
- IS 1448 Pt.143-1993 Test methods for petroleum and its products [P: 143] Ultraviolet absorption evaluation of white mineral oil
American Society for Testing and Materials (ASTM), Petroleum UV Curve
- ASTM D2008-23 Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-91(2001) Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-91(2006) Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-91(1996)e1 Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-12 Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-85 Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D2008-09 Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D87-04 Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve)
- ASTM RR-D02-1617 2007 D0087-Test Method for Melting Point of Petroleum Wax (Cooling Curve)
- ASTM D2008-12(2018) Standard Test Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
- ASTM D87-09(2018) Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve)
- ASTM D87-09 Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve)
- ASTM D6667-14(2019) Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
Danish Standards Foundation, Petroleum UV Curve
- DS/EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- DS/CEN/CR 13840:2000 Petroleum products - Determination of polycyclic aromatic hydrocarbons - Ultraviolet (UV) spectrometric method
- DS/EN ISO 20846:2011 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
HU-MSZT, Petroleum UV Curve
- MSZ 18289/7-1980 Durability testing of construction stones. UV and IR inspection
GM North America, Petroleum UV Curve
- GM GMP.E/P.075-1997 Polyolefin Alloy - 440 MPa Flexural Modulus, UV Stabilized
- GM GMP.E/P.096-2004 Polyolefin Alloy - MPa Flex Mod, UV Stabilized, High Flow
- GM GMP.E/P.032-1990 Polyolefin Alloy - 900 MPa Flexural Modulus, Interior UV Light Stabilized, Injection Molding Grade
- GM GMP.ABS+PC.017-1995 ABS + PC - UV Light Stabilized
- GM GMP.SAN.001-1996 San - UV Stabilized, Clear
- GM GMP.ABS.017-1992 ABS - UV Stabilized, General Purpose
- GM GMP.PP.067-1996 Polypropylene - 13% Talc Filled, Heat Resistant, UV Stable Copolymer
- GM GMP.PP.063-1995 Polypropylene - 15% TALC Filled, High Impact, UV Stable, Copolymer
- GM GMP.ABS.002-1990 ABS - Ultraviolet Light Stabilized, Low Gloss
- GM GMP.ABS.004-1990 ABS - Ultraviolet Light Stabilized, Low Gloss
- GM GMP.E/P.113-2003 Polyolefin Alloy UV Stabilized, 700 MPa Flexural Modulus, Low Temperature Impact, Injection Molded
- GM GMP.PP.094-2003 Polypropylene (PP), 20% Talc Filled, UV Stabilized, Copolymer, ISO Tests
German Institute for Standardization, Petroleum UV Curve
- DIN EN ISO 3656:2017-08 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011 + Amd 1:2017); German version EN ISO 3656:2011 + A1:2017
- DIN ISO 3841:1983 Petroleum waxes; determination of melting point (cooling curve)
- DIN 51532:2012 Petroleum waxes - Determination of melting point (cooling curve)
- DIN 51532:2012-12 Petroleum waxes - Determination of melting point (cooling curve)
- DIN EN 17178:2018 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy; German and English version prEN 17178:2018
- DIN EN 17178:2019 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- DIN EN ISO 20846:2019-12 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method (ISO 20846:2019); German version EN ISO 20846:2019
- DIN EN 17178:2019-12 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy; German version EN 17178:2019
- DIN EN 61228:1995 Method for measuring and determining the UV radiation from UV lamps for tanning purposes
- DIN EN ISO 3656:2017 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011 + Amd 1:2017) (includes Amendment :2017)
- DIN EN ISO 20846 E:2018-10 Determination of Sulfur Content of Petroleum Products Automobile Fuels by Ultraviolet Fluorescence Method (Draft)
International Organization for Standardization (ISO), Petroleum UV Curve
- ISO 20846:2004 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
- ISO 3656:1989 Animal and vegetable fats and oils; determination of ultraviolet absorbance
- ISO 3656:1977 Animal oils and fats — Determination of specific extinction in ultra-violet light
- ISO 3656:2011 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
- ISO/CD 20846:2023 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
- ISO 20846:2011 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method
- ISO 20846:2019 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
- ISO 4735:2002 Oils of citrus - Determination of CD value by ultraviolet spectrometric analysis
- ISO 3656:2011/Amd 1:2017 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction; Amendment 1
Professional Standard - Medicine, Petroleum UV Curve
- YY/T 0160-1994 Straight tube quartz ultraviolet low pressure mercury disinfection lamp
Spanish Association for Standardization (UNE), Petroleum UV Curve
- UNE-EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
- UNE-EN ISO 20846:2020 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method (ISO 20846:2019)
- UNE-EN 17178:2020 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- UNE-EN ISO 3656:2011/A1:2017 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction - Amendment 1 (ISO 3656:2011/Amd 1:2017)
SCC, Petroleum UV Curve
- DANSK DS/EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- NS-EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
- DANSK DS/EN ISO 3656/A1:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- BS EN ISO 3656:2002 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
- DANSK DS/CEN/CR 13840:2000 Petroleum products - Determination of polycyclic aromatic hydrocarbons - Ultraviolet (UV) spectrometric method
- AWWA ACE56307 UV Disinfection of Filtered Water Supplies: Water Quality Impacts on MS2 Dose-Response Curves
- SN-CR 13840:2000 Petroleum products — Determination of polycyclic aromatic hydrocarbons — Ultraviolet (UV) spectrometric method
- NS-EN ISO 3656:2002 Animal and vegetable fats and oils — Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2002)
- BS 4695:1971 Method for determination of melting point of petroleum wax (cooling curve)
- AWWA WQTC62577 Analyzing UV Reactor Validation Data to Verify UV Dose Delivery Using the UV Disinfection Guidance Manual
- AWWA WQTC62609 UV Disinfection Cost Update: Current North American UV Facility Costs
- DANSK DS/ISO 20846:2019 Petroleum products – Determination of sulfur content of automotive fuels – Ultraviolet fluorescence method
- NS-EN 17178:2019 Liquid petroleum products — Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- CIE 155:2003 Ultraviolet air disinfection
- DIN 51532 E:2011 Draft Document - Petroleum waxes - Determination of melting point (cooling curve)
- AWWA ACE59838 UV Reactor Analysis Using CFD and UV Intensity Models
- AWWA WQTC62434 Assessing UV Cleaning and Fouling Requirements of Lime Softened Water
- DANSK DS/EN 17178:2019 Liquid petroleum products – Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- BS EN ISO 20846:2004 Methods of test for petroleum and its products. BS 2000-490: Petroleum products. Determination of sulfur content of liquid petroleum products. Ultraviolet fluorescence method
- AWWA WQTC60686 Reducing UV Design Safety Factors — Optimization of UV Reactor Validation
- AWWA ACE59981 UV Disinfection of Indigenous Aerobic Spores for UV Reactor Validation
- DIN EN ISO 3656 E:2010 Draft Document - Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO/DIS 3656:2009); German version prEN ISO 3656:2009
- AWWA WQTC58924 The Effects of Power Quality on UV Disinfection: Will it Kill UV Disinfection?
- BS EN 61228:1995 Method of measuring and specifying the UV radiation of ultraviolet lamps used for sun-tanning
- CIE 172:2006 UV protection and clothing
- AWWA ACE56298 The Impact of the Draft UV Disinfection Requirements on UV Facility Design and Operation
- AENOR UNE-EN ISO 3656/A1:2017 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction - Amendment 1 (ISO 3656:2011/Amd 1:2017)
- AWWA WQTC60793 New York City's Large Scale UV Equipment Validation Program: Optimizing the Selection of UV Equipment
- DIN EN 17178 E:2018 Draft Document - Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy; German and English version prEN 17178:2018
- AWWA WQTC62575 Development of an Online UV Dosimeter
- AWWA WQTC58815 UV Destruction of Malathion
- HOLDEN HN 1096-2009 POLYPROPYLENE UV STABILISED
- AWWA WQTC64090 UV/Chlorine: Looking Beyond Conventional DBPs
- DANSK DS/EN ISO 20846:2019 Petroleum products – Determination of sulfur content of automotive fuels – Ultraviolet fluorescence method (ISO 20846:2019)
- AWWA WQTC57092 UV Disinfection at a Finished Water Reservoir; The In's and Out's of Albany's New UV Facility
British Standards Institution (BSI), Petroleum UV Curve
- BS EN ISO 3656:2011+A1:2017 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
- BS 4695:1980 Method for determination of melting point of petroleum wax (cooling curve)
- BS EN ISO 3656:2011 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
- BS EN ISO 20846:2011 Petroleum products. Determination of sulfur content of automotive fuels. Ultraviolet fluorescence method
- BS EN ISO 20846:2019 Petroleum products. Determination of sulfur content of automotive fuels. Ultraviolet fluorescence method
- BS EN 17178:2019 Liquid petroleum products. Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
Lithuanian Standards Office , Petroleum UV Curve
- LST EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
Korean Agency for Technology and Standards (KATS), Petroleum UV Curve
- KS M 2740-1-2020 Petroleum waxes-Determination of melting point(cooling curve)
- KS C IEC 61228:2013 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
- KS C IEC 61228:2001 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
- KS M 2740-1-2005(2020) Petroleum waxes-Determination of melting point(cooling curve)
- KS M 2740-1-2005 Petroleum waxes-Determination of melting point(cooling curve)
- KS M ISO 20846:2021 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
- KS A 5005-1985 Measuring methods of ultraviolet
- KS A 5005-1977(2021) Measuring methods of ultraviolet
- KS M ISO 20846-2012(2017) Petroleum products-Determination of sulfur content of automotive fuels-Ultraviolet fluorescence method
- KS K 0850-2014 Test method for ultraviolet protection rate and ultraviolet protection factor of textiles
- KS K 0850-2023 Test method for ultraviolet protection rate and ultraviolet protection factor of textiles
- KS M ISO 20846:2012 Petroleum products-Determination of sulfur content of automotive fuels-Ultraviolet fluorescence method
- KS C IEC 61228-A-2014(2019) Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
- KS A 5005-1977 Measuring methods of ultraviolet
- KS H ISO 4735:2014 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
- KS C IEC 61228-2001(2011) Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
- KS H ISO 4735:2011 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
BE-NBN, Petroleum UV Curve
Professional Standard - Energy, Petroleum UV Curve
- NB/SH/T 0415-2013 Standard test method for ultraviolet absorbance and absorptivity of petroleum products
Professional Standard - Environmental Protection, Petroleum UV Curve
- HJ 970-2018 Water Quality Determination of Petroleum by UV Spectrophotometry (Trial)
Professional Standard - Building Materials, Petroleum UV Curve
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Petroleum UV Curve
ASHRAE - American Society of Heating@ Refrigerating and Air-Conditioning Engineers@ Inc., Petroleum UV Curve
Military Standard of the People's Republic of China-General Armament Department, Petroleum UV Curve
Professional Standard - Light Industry, Petroleum UV Curve
American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), Petroleum UV Curve
中華人民共和國國家質(zhì)量監(jiān)督檢驗檢疫總局、中國國家標(biāo)準(zhǔn)化管理委員會, Petroleum UV Curve
PL-PKN, Petroleum UV Curve
- PN C04001-1967 Petroleum Determination of curve of the veritabies boilings tempera?ures and of curves of the physicols and chemicals properties
- PN-EN 17178-2020-01 P Liquid petroleum products--Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
- PN C97088-1987 Coal derivative products UV spectrophotometric determination of tar acids content in coal tar and oils
- PN-EN ISO 20846-2020-03 P Petroleum products--Determination of sulfur content of automotive fuels--Ultraviolet fluorescence method (ISO 20846:2019)
American National Standards Institute (ANSI), Petroleum UV Curve
Standard Association of Australia (SAA), Petroleum UV Curve
- ISO 3656:2011/Amd.1:2017 Animal and vegetable fats and oils — Determination of ultraviolet absorbance expressed as specific UV extinction AMENDMENT 1
GSO, Petroleum UV Curve
- GSO ISO 20846:2022 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
- BH GSO ISO 20846:2023 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
European Committee for Standardization (CEN), Petroleum UV Curve
- EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
- EN ISO 20846:2019 Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method (ISO 20846:2019)
Indonesia Standards, Petroleum UV Curve
CEN - European Committee for Standardization, Petroleum UV Curve
- EN ISO 3656:2002 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- PREN 17178-2018 Liquid petroleum products - Determination of the total volatile sulfur content in liquefied petroleum gases by ultraviolet fluorescence spectroscopy
Professional Standard - Meteorology, Petroleum UV Curve
KR-KS, Petroleum UV Curve
- KS M ISO 20846-2021 Petroleum products — Determination of sulfur content of automotive fuels — Ultraviolet fluorescence method
US-FCR, Petroleum UV Curve
Group Standards of the People's Republic of China, Petroleum UV Curve
Sichuan Provincial Standard of the People's Republic of China, Petroleum UV Curve
- DB51/T 1699-2013 Determination of total sulfur content in liquefied petroleum gas (LPG) by ultraviolet fluorescence method
Taiwan Provincial Standard of the People's Republic of China, Petroleum UV Curve
- CNS 14247-1998 Method of test for naphthalene hydrocarbons in aviation turbine fuels by ultravioet spectrophotometry
GM Europe, Petroleum UV Curve
- GME QK 000198-1983 Polycarbonat -Formmasse, UV-stabilisiert Polycarbonate - Moulding Compounds, UV Stabilized
International Electrotechnical Commission (IEC), Petroleum UV Curve
- IEC 61228:1993 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning
- IEC 61228/AMD1:1996 Method of measuring and specifying the UV-radiation of ultraviolet lamps used for sun-tanning; Amendment 1
Professional Standard - Chemical Industry, Petroleum UV Curve
- HG/T 4735-2014 Textile dyeing and finishing auxiliaries.Ultraviolet resistant finishing agent.Evaluation for solar ultraviolet radiation protective properties
- HG/T 4498-2013 Synthetic hydrotalcite UV blocking materials
International Commission on Illumination (CIE), Petroleum UV Curve
RO-ASRO, Petroleum UV Curve
- STAS 10017-1975 LIQUID PETROLEUM PRODUCTS Determination of trim boiling point curve
工業(yè)和信息化部, Petroleum UV Curve
Professional Standard - Education, Petroleum UV Curve
(U.S.) Ford Automotive Standards, Petroleum UV Curve
國家市場監(jiān)督管理總局、中國國家標(biāo)準(zhǔn)化管理委員會, Petroleum UV Curve
Fujian Provincial Standard of the People's Republic of China, Petroleum UV Curve
- DB35/T 1351-2013 Determination of total sulfur content in gaseous hydrocarbons and liquefied petroleum gases by ultraviolet fluorescence method