Determination of milk by ultraviolet spectrophotometry
Determination of milk by ultraviolet spectrophotometry, Total:172 items.
The international standard classification for "Determination of milk by ultraviolet spectrophotometry" includes: Alcohols. Ethers , Waxes, bituminous materials and other petroleum products , Workplace atmospheres , Sugar and sugar products , Beekeeping , Ambient atmospheres , Analytical chemistry in general , Tobacco, tobacco products and related equipment , Cadmium, cobalt and their alloys , Animal and vegetable fats and oils , Boilers and heat exchangers , Natural gas , Chemical reagents , Petroleum products in general , Optics and optical measurements , Environment and health protection. Safety (Vocabularies) , Biology. Botany. Zoology , Spices and condiments .
The Chinese standard classification for "Determination of milk by ultraviolet spectrophotometry" includes: Basic organic chemicals , Petroleum wax , Labor sanitation , Sugar refining , Beekeeping, silkworm keeping , Analysis methods for toxic substances in atmosphere , Electrochemical, thermochemistry and optical profile type analyzer , Tobacco , Heavy metals and their alloys analysis method , Grease and oil processing and products , Boiler and its auxiliary equipment , Natural gas , Chemical reagent in general , Cosmetics , Agriculture and forestry technology , Basic standards and general methods on chemical fertilizers , Petroleum products in general , Fuel oil , Environmental Quality Standard for atmosphere, water and soil , Analysis methods for exhaust emission pollutants , Hydrogeological survey , Chemical Measurement , Electron optics and other physical optics instrument , Analysis methods for substances in ocean , Aromatics, seasoner crop and product .
Professional Standard - Water Conservancy
- SL 84-1994 Determination of nitrogen(nitrate) (Ultraviolet spectrophtometric method)
- SL 93.2-1994 Determination of oil and grease (Vltraviolet spectrophotometric method)
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB 4702.9-1985 Chromium Metal Chemical Analysis Method Crystal Violet Spectrophotometric Determination of Antimony Content
- GB/T 32737-2016 Determination of nitrate nitrogen in soil—Ultraviolet spectrophotometry method
- GB/T 12153-1989 Analysis of water used in boiler and cooling system--Determination for mineral oil--Ultraviolet spectrophotometry
- GB/T 16077-1995 Workplace air―Determination of phosgene―Ultraviolet spectrophotometric method
- GB/T 14571.4-2008 glycol for industrial use - Determination of ultraviolet transmittance - Ultraviolet spectrophotometric method
- GB/T 14422-1993 Analysis of water used in boiler and cooling system-Determination of benzotriazole-Ultraviolet spectrophotometry
- GB/T 19611-2004 Tobacco and tobacco products - Determination of maleic hydrazide residues - UV Spectrophotometer method
- GB/T 22500-2008 Animal and vegetable fats and oils—Determination of ultraviolet absorbance expressed as specific UV extinction
- GB/T 11081-1989 White oils-Determination of ultraviolet absorption
- GB/T 15438-1995 Ambient air--Determination of ozone--Ultraviolet photometric method
- GB/T 2136-1980 Determination of thallium content in cadmium--Crystal violet photometric method
- GB/T 11060.8-2012 Natural gas - Determination of sulfur compound - Part 8:Determination of total sulfur content by Ultraviolet fluorescence method
- GB/T 26813-2011 Double beam UV/VIS spectrophotometer
- GB/T 18932.6-2002 Method for the determination of glycerol contents in honey--UV spectrophotometric method
- GB 9721-1988 Molecular Absorption Spectrophotometry of Chemical Reagents General Rules (Ultraviolet and Visible Parts)
- GB/T 11081-2005 Standard test method for ultraviolet adsorption of white oils
- GB/T 23195-2008 Method for the determination of catalase in bee pollen - Ultaraviolet spectrophotometry
- GB/T 34796-2017(英文版) Quantification and purity analysis of nucleic acid concentration in solution—Ultraviolet spectrophotometry
- GB/T 14423-1993 Analysis of water used in boiler and cooling system. 2-Mercaptobenzothiazole. Ultraviolet spectrophotometry
- GB/T 26798-2011 Single beam UV/VIS spectrophotometer
- GB/T 9721-2006 Chemical reagent - General rules for the molecular absorption spectrophotometry (ultraviolet and visible)
- GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
- GB/T 16055-1995 Workplace air―Determination of diphenyl-diphenyl ether―Ultraviolet spectrophotometric method
Military Standard of the People's Republic of China-General Armament Department
- GJB 3639-1999 Determination of Benzene Chloroacetophenone UV Spectrophotometry
- GJB 4781-1997*GJBz 20413.3-1997 Determination of Sies by UV spectrophotometry
- GJB 4781-1997(XG1-2015) Modification sheet 1-2015 for the ultraviolet spectrophotometric method for determination of Sies
- GJB 772.407-1989 Explosives test methods: UV spectrophotometric determination of components of TNT/RDX injected explosives
- GJB 3639-1999(XG1-2015) Determination of Benzene Chloroacetophenone UV Spectrophotometry Modification Sheet 1-2015
Shandong Provincial Standard of the People's Republic of China
- DB37/T 4149-2020 Determination of water quality UV254 by ultraviolet spectrophotometry
Professional Standard - Light Industry
- QB/T 2334-1997 Method for the Qualitative Determination of Ultraviolet Absorbents in Cosmetics - Ultraviolet Spectrophotometry
Professional Standard - Agriculture
- 775兽药典 一部-2015 Appendix Contents 0400 Spectroscopy 0401 UV-Vis Spectrophotometry
- NY/T 1799-2009 Determination of oxazolidinethione in rapeseed meal and feed Specification method
- 67药典 四部-2015 0401 UV-visible spectrophotometry
- NY/T 4306-2023 Determination of activity of papain and bromelain-Ultaraviolet spectrophotometry
- 772兽药典 二部-2015 Appendix Contents 0400 Spectroscopy 0401 UV-Vis Spectrophotometry
- 2297药典 二部-2010 Appendix IV A UV-Vis Spectrophotometry
- NY/T 1279-2007 Determination of Nitrate in Vegetables and Fruits UV-spectrophotometer
- NY/T 1116-2006 Fertilizers - Determination of nitrate nitrogen content - Ultraviolet spectro - Photometric method
- 197药典 三部-2020 Spectrophotometry 0401 UV-Vis Spectrophotometry
- 47药典 四部-2020 0401 UV-visible spectrophotometry
- 178药典 三部-2015 Spectrophotometry 0401 UV-Vis Spectrophotometry General Principles 19
- 1759药典 一部-2010 Appendix VA UV-Vis Spectrophotometry
- 153药典 三部-2010 Appendix Ⅱ Spectrophotometry ⅡA UV-Vis Spectrophotometry
Group Standards of the People's Republic of China
- T/QAS 082.3-2022 Chemical Analysis of Rock Salt and Glauber's Salt Part 3: Determination of Nitrate by Ultraviolet Spectrophotometry
- T/NAIA 0193-2023 Determination of Concentration and Purity of Single-chain Antibody Eukaryotic Expression Plasmid DNA by UV Spectrophotometry
- T/CSTM 00198-2021 Graphene quantum dots—Determination of enzyme-like activities — Ultraviolet-visible spectrophotometry
- T/STIC 110086-2023 Double Beam UV-VIS Spectrophotometer
- T/QAS 035-2021 Determination of nitrate in brine by ultraviolet spectrophotometry
- T/GXAS 545-2023 Seawater—Rapid determination of petroleum on site—Ultraviolet spectrophotometric 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 11060.8-2020 Natural gas—Determination of sulfur compounds—Part 8:Determination of total sulfur content by ultraviolet fluorescence method
- GB/T 14571.4-2022 Test method of ethylene glycol for industrial use—Part 4:Determination of ultraviolet transmittance—Ultraviolet spectrophotometric method
国家能源局
- SH/T 0966-2017 Determination of aromatic hydrocarbon content in white oil by UV spectrophotometry
Professional Standard - Petrochemical Industry
- SH/T 1498.7-1997 Nylon 66 salt - Determination of UV index - -Ultraviolet spectrophotometric method
- SH/T 0181-2005 Standard test method for naphthalene hydrocarbons in jet fuels by ultraviolet spectrophotometry
- SH/T 0406-1992 Determination method for vaseline ultraviolet absorbance
- SH/T 0181-1992 Method for Determination of Naphthalene Hydrocarbon Content in Jet Fuel (Ultraviolet Spectrophotometry)
- SH/T 0409-1992 Determination of aromatic hydrocarbons in liquid paraffin (UV spectrophotometric method)
- SH/T 0662-1998 Mineral oil - Determination of ultraviolet absorbance
- SH/T 1498.5-1997 Nylon 66 salt-Determination of content of pscudo diaminocylohcloexane-Uitraviolet specterophotometric method
Professional Standard - Environmental Protection
- HJ/T 42-1999 Stationary source emission -- Determination of nitrogen oxide -- Ultraviolet spectrophotometric method
- HJ 636-2012 Water quality. Determination of total nitrogen. Alkaline potassium persulfate digestion UV spectrophotometric method
- HJ 590-2010 Ambient air - Dtermination of ozone - Ultraviolet photometric method
- HJ/T 31-1999 Stationary source emission -- Determination of phosgene -- Aniline ultraviolet spectrophotometric method
- HJ 756-2015 Water quality - Determination of butyl xanthate - UV spectrophotometric method
- HJ 970-2018 Water quality - Determination of petroleum - Ultraviolet spectrophotometric method
- HJ/T 346-2007 Water quality-Determination of nitrate-nitrogen-Ultraviolet spectrophotometry
Professional Standard - Geology
- DZ/T 0064.59-1993 Groundwater quality test methods - the determination of nitrate radical with ultraviolet spectrophotometric method
- DZ/T 0064.59-2021 Methods for analysis of groundwater quality- Part 59: Determination of nitrate- Ultraviolet spectrophotometry
Ningxia Provincial Standard of the People's Republic of China
- DB64/T 1515-2017 Determination of Total Glucosides in Sheep Placenta Capsules by Ultraviolet Spectrophotometry
National Metrological Verification Regulations of the People's Republic of China
- JJG 375-1996 UItraviolet Visible Range Spectrophotometer in Single Beam
- JJG 682-1990 Verification Regulation of Double Beam UV-VIS Spectrophotometers
- JJG 178-2007 Ultraviolet,Visible,Near-Infrared Spectrophotometers
- JJG(地质) 1002-1990 Verification Regulations for UV/Visible Spectrophotometer
- JJG 689-1990 UV-VIS-NIR Spectrophotometer
国家质量监督检验检疫总局
- SN/T 0859-2016 Determination of dehydroacetic acid in condiments for export- Ultraviolet spectrophotometric method
Professional Standard - Machinery
- JB/T 6777-1993 UV/VIS Spectrophotometer
- JB/T 6778-1993 UV/VIS Near Infrared Spectrophotometer
Professional Standard - Energy
- NB/SH/T 0415-2013 Determination Method for Ultraviolet Absorbance and Absorptivity of Petroleum Products
Tianjin Provincial Standard of the People's Republic of China
- DB12/T 885-2019 Determination of Proanthocyanidins in Plant Extracts by UV/Vis Spectrophotometry
- DB12/T 884-2019 Determination of Polysaccharide Content in Lily Bulbs by UV/Vis Spectrophotometry
Jiangsu Provincial Standard of the People's Republic of China
- DB32/T 4344-2022 Marine sediment―Determination of oil―Ultrasonic Extraction-UV spectrophotometric method
中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会
- GB/T 34796-2017 Quantification and purity analysis of nucleic acid concentration in solution-Ultraviolet spectrophotometry
未注明发布机构
- ASTM RR-D02-1525 2002 D1840- Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- AS 3753:2001(R2016) Recommended practice for chemical analysis by ultraviolet/visible spectrophotometry
- ASTM RR-D02-1375 1995 D1840-Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
Jilin Provincial Standard of the People's Republic of China
- DB22/T 2529-2016 Determination of Anthocyanins in Purple Ear Corn by Spectrophotometry
Professional Standard - Non-ferrous Metal
- YS/T 74.8-1994 Method for chemical analysis of cadmium Crystal violet spectrophotometric method for determination of thallium
Professional Standard - Nuclear Industry
- EJ/T 296.2-2014 Determination of trace uranium in urine liquid fluorometry by ultraviolet
- EJ/T 20057-2014 Determination of uranium concentration in atmospheric fallout.Liquid fluorometry by ultraviolet
National Health Commission of the People's Republic of China
- GB 23200.87-2016 National food safety standard―Determination of thiabendazole residue in milk and milk products
Hebei Provincial Standard of the People's Republic of China
- DB13/T 2899-2018 Determination of iminodisuccinate content in urea by ultraviolet-visible spectrophotometry
中华全国供销合作总社
- GH/T 1290-2020 Prickly ash and its processed products―Determination of total fagaramide―Ultraviolet spetrophotometry
Korean Agency for Technology and Standards (KATS)
- KS H ISO 4735-2019 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
- KS H ISO 4735:2014 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
- KS H ISO 4735:2011 Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
- KS M 2231-1980 Testing method for naphthalene type hydrocarbon contents in aviation turbine fuels by ultraviolet spectrophotometry
- KS M 2231-2010 Testing method for naphthalene type hydrocarbon contents in aviation turbine fuels by ultraviolet spectrophotometry
- KS B 5570-2017 Performance test for UV/Vis spectrophotometer
- KS I ISO 13964:2004 Air quality-Determination of ozone in ambient air-Ultraviolet photometric method
- KS B 5570-2022 Performance test for UV/Vis spectrophotometer
- KS I ISO 13964:2014 Air quality — Determination of ozone in ambient air — Ultraviolet photometric method
- KS M 2231-2014 Testing method for naphthalene type hydrocarbon contents in aviation turbine fuels by ultraviolet spectrophotometry
- KS I ISO 10566-2008(2018) Water quality-Determination of aluminium-Spectrometric method using pyrocatechol violet
- KS H ISO 4735-2014(2019) Oils of Citrus-Determination of CD value by ultraviolet spectrometric analysis
GSO
- GSO ISO 4735:2015 Oils of Citrus -- Determination of CD value by ultraviolet spectrometric analysis
- NB/SH/T 0966-2017 Determination of aromatics content in white oil - UV spectrophotometry
- GSO ISO 3656:2015 Animal and vegetable fats and oils -- Determination of ultraviolet absorbance expressed as specific UV extinction
- BH GSO ISO 3656:2016 Animal and vegetable fats and oils -- Determination of ultraviolet absorbance expressed as specific UV extinction
- GSO ISO 10566:2013 Water quality -- Determination of aluminium -- Spectrometric method using pyrocatechol violet
- OS GSO ISO 4735:2015 Oils of Citrus -- Determination of CD value by ultraviolet spectrometric analysis
- GSO ASTM G130:2010 Standard Test Method for Calibration of Narrow- and Broad- Band Ultraviolet Radiometers Using a Spectroradiometer
IN-BIS
- IS 1448 Pt.63-1967 Determination of benzene and toluene by UV spectrophotometry
RU-GOST R
- GOST ISO 4735-2015 Essential oils of citrus. Determination of CD value by ultraviolet spectrometric analysis
- GOST 16948-1979 Light sources, artificial. Method of determining ultraviolet radiation density energy flow
- GOST 34712-2021 Natural gas. Determination of total sulfur by ultraviolet fluorescence method
Association Francaise de Normalisation
- NF T75-122*NF ISO 4735:2002 Oils of Citrus - Determination of CD value by ultraviolet spectrometric analysis.
- NF EN ISO 3656:2011 Fatty substances of animal and vegetable origin - Determination of ultraviolet absorbance, expressed in the form of specific extinction in ultraviolet light
- 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 ISO 4735:2002 Citrus essential oils - Determination of the CD value by ultraviolet spectrometric analysis
International Organization for Standardization (ISO)
- ISO 4735:2002 Oils of citrus - Determination of CD value by ultraviolet spectrometric analysis
- ISO 13964:1998 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method
- ISO 4735:1981 Oils of citrus; Determination of CD value by ultraviolet spectrophotometric analysis
- ISO 3656:2011 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
AENOR
- UNE 84124:2014 Cosmetic raw materials. Determination of UV-filters by spectrophotometric absorbance.
- UNE 55047:1973 FATS. SPECTROPHOTOMETRIC MEASURE OF ABSORPTION IN THE ULTRAVIOLET AREA.
- UNE-EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
- UNE-ISO 4735:2009 Oils of Citrus. Determination of CD value by ultraviolet espectrometric analysis
NO-SN
- NS 9462-2006 Water quality Determination of UV-absorbance
SCC
- NS 9462:2006 Water quality — Determination of UV-absorbance
- UNE 84124:2000 Cosmetic raw materials. Determination of UV-filters by spectrophotometric absorbance.
- UNE 84170:1983 OIL OF LEMON. ULTRA-VIOLET SPECTROPHOTO METRIC ANALYSIS
- DANSK DS/EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- DANSK DS/EN ISO 3656/A1:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
- BS 684-1-1.15:1978 Methods of analysis of fats and fatty oils. Physical methods-Determination of specific extinction in ultra-violet light
- NS-EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
- NS-EN ISO 3656:2002 Animal and vegetable fats and oils — Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2002)
- 10/30197374 DC BS ISO 3656. 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
- UNE-EN ISO 3656:2002 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction. (ISO 3656:2002)
- AS 3753:1990 Recommended practice for chemical analysis by ultraviolet/visible spectrophotometry
PL-PKN
- PN C97087-1987 UV Spectrophotometric determination of phenols in coke and waste waters
- PN Z04200-02-1988 Air purity protection ests for oxalic acid etermination of oxalic acid by ltraviolet absorption spectrophotometry
- PN C97085-1986 Carbochemical products UV Spectrophotometric determination of naphihalene in coal tar and coal tar oils
- PN C97089-1989 Carbochemical products UV spectrophotometric determination of anthracene in coal tar and coal tar oils
German Institute for Standardization
- 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 13964:1999 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method (ISO 13964:1998)
Danish Standards Foundation
- DS/EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction
Standard Association of Australia (SAA)
- AS 3753:2001 Recommended practice for chemical analysis by ultraviolet/visible spectrophotometry
American Society for Testing and Materials (ASTM)
- ASTM UOP495-00 Aromatics in Molex n-Paraffin Products by Ultraviolet Spectrophotometry
- ASTM D1840-22 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM E2193-23 Standard Test Method for Ultraviolet Transmittance of Monoethylene Glycol (using Ultraviolet Spectrophotometry)
- ASTM E958-93(2005) Standard Practice for Measuring Practical Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers
- ASTM D1840-02 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM D1840-03 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM D1840-96 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM D1840-07(2013) Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM D1840-07 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
- ASTM D1017-51(1978)e1 Test Method for Benzene and Toluene in 250F and Lighter Petroleum Products by Ultraviolet Spectrophotometry
- ASTM D1840-01 Standard Test Method for Naphthalene Hydrocarbons in Aviation Turbine Fuels by Ultraviolet Spectrophotometry
Universal Oil Products Company (UOP)
- UOP 495-2003 AROMATICS IN MOLEX PROCESS n-PARAFFIN PRODUCTS BY ULTRAVIOLET SPECTROPHOTOMETRY
British Standards Institution (BSI)
- BS EN ISO 3656:2011+A1:2017 Animal and vegetable fats and oils. Determination of ultraviolet absorbance expressed as specific UV extinction
DIN
- DIN EN ISO 3656:2002 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2002)
Lithuanian Standards Office
- LST EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
AT-ON
- ONORM DIN 10324-1993 Determination of the total phosphorus content of cheese and processed cheese - Spectrometric method
GOST
- GOST ISO 20846-2012 Petroleum products. Determination of sulfur content by ultraviolet fluorescence method
PT-IPQ
- NP 3362-1986 Citrus fruit refined oil. Measurement of CD value by UV spectrophotometry
BR-ABNT
- ABNT NBR 11672-2007 Insumes - Concentrated pigment dispersion - Determination of ultraviolet light color fastness
European Committee for Standardization (CEN)
- EN ISO 3656:2011 Animal and vegetable fats and oils - Determination of ultraviolet absorbance expressed as specific UV extinction (ISO 3656:2011)
RO-ASRO
- STAS SR ISO 3656:1996 Animal and vegetable fats and oils - Determination of ultraviolet absorbance
GOSTR
- GOST 34237-2017 Petroleum products. Determination of total sulfur by method ultraviolet fluorescence
Determination of copper by ultraviolet spectrophotometry,Oil Determination UV Spectrophotometry,Determination of water by ultraviolet spectrophotometry,Determination of Soil by Ultraviolet Spectrophotometry,Determination of ore by ultraviolet spectrophotometry,Determination of stone by ultraviolet spectrophotometry,Determination of orange by ultraviolet spectrophotometry,Determination of B by UV spectrophotometry,Determination of content by ultraviolet spectrophotometry,Determination of milk by ultraviolet spectrophotometry,Petroleum Determination by UV Spectrophotometry,Determination of red by ultraviolet spectrophotometry,Determination of sugar by ultraviolet spectrophotometry,Determination and Analysis by UV Spectrophotometry,Determination of color by UV spectrophotometry,Determination of Benzene by UV Spectrophotometry,Content determination UV spectrophotometry,UV spectrophotometry plus,Determination of formazan by ultraviolet spectrophotometry,Determination of Beer by Ultraviolet Spectrophotometry