Food coloring fineness
Food coloring fineness, Total:233 items.
The international standard classification for "Food coloring fineness" includes: food products in general , Fruits. Vegetables , Prepackaged and prepared foods , Cereals, pulses and derived products , Sugar and sugar products , Vegetables and derived products , Fish and fishery products , Farming and forestry , Milk and milk products in general , Food additives , General methods of tests and analysis for food products , Biology. Botany. Zoology .
The Chinese standard classification for "Food coloring fineness" includes: Food additive and nutrition enhancer sanitation , Food sanitation , Baking products , Puffing and compressed foods , Cereal crop and product , Saccharified residues , Salt products , Other cash crops , Grain processing and products , Ornamental plant , Aquatic product and fishery in general , Milk and dairy products , Natural food additives , Basic standards and general methods , Papermaking in general , Hygiene, safety and labor protection , Basic Subject in general .
Shanghai Provincial Standard of the People's Republic of China
- DB31/ 169-1996 Food additive compound food coloring brown
- DB31/ 172-1996 Food additive compound food coloring tomato red
- DB31/ 173-1996 Food additive compound food coloring cocoa brown
- DB31/ 170-1996 Food Additive Compound Food Coloring Tender Leaf Green
- DB31/ 168-1996 food additive compound food coloring black
- DB31/ 171-1996 food additive compound food coloring egg yolk
未注明发布机构
- DIN EN 14164 E:2012-04 Foodstuffs - Determination of vitamin B6 by high performance chromatography
- DIN CEN/TS 17303:2019*DIN SPEC 10703:2019 Foodstuffs - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- DIN EN 17203 E:2017-12 Foodstuffs - Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
- DIN EN 14152 E:2012-04 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography
- DIN EN 17203 E:2019-10 Foodstuffs - Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
Hebei Provincial Standard of the People's Republic of China
- DB13/ 8-1991 food additive curcumin
- DB13/ 440-2000 Food Additive Water Soluble Curcumin
- DB13/ 441-2000 Food Additive Oil Soluble Curcumin
Taiwan Provincial Standard of the People's Republic of China
- CNS 10889-1987 Methods of Test for Coal Tar Dyes in Food
Professional Standard - Light Industry
- QB 1415-1991 Food Additive - Curcumin
- QB/T 1412-1991 Food additive caramel coloring (ammonium sulfite method)
- QB 1412-1991 Food additive caramel coloring (ammonium sulfite method)
Professional Standard - Forestry
- LY 1299-1999 Food additive Carthamin yellow
Professional Standard - Agriculture
- NY/T 1889-2017 Green food-Roasted food
- NY/T 1512-2014 Green food―Uncooked processes food made of cereal
- NY/T 1511-2015 Green food. Puffed food
- GB/T 5009.25-1996 Method for determination of sterigmatocystin in foods
- NY/T 1511-2007 Green food--Puffed food
- NY/T 657-2012 Green food - Dairy product
- NY/T 4268-2023 Green food-Steeped instant food
- NY/T 422-2016 Green food. Edible sugar
- NY/T 1506-2015 Green food. Edible flower
- NY/T 841-2004 Green food crab
- KJ 201909 Curcumin colorimetric method for rapid detection of boric acid in food
- NY/T 840-2004 Green food shrimp
- NY/T 1889-2010 Green food—Roasted food
- NY/T 1040-2006 Green food - Edible salt
- NY/T 2109-2011 Green food-Fish snack
- NY/T 749-2023 Green food—Edible mushroom
- NY/T 2107-2011 Green food-Filling of food
- NY/T 1512-2007 Green food-Uncooked processed food made of cereals
- NY/T 1714-2015 Green food. Instant cereal meal
- NY/T 749-2018 Green food-Edible mushroom
- NY/T 2109-2023 Green food-Fish snack food
- NY/T 422-2006 Green food -- White granulated sugar
- NY/T 1040-2012 Green food-Edible salt
- NY/T 840-2012 Green food shrimp
- NY/T 1330-2007 Green Food - Instant Staple Food
- NY/T 1506-2007 Green food—Edible folwers
- NY/T 1046-2016 Green food. Baked food
- NY/T 749-2003 Green food - Edible mushroom
- NY/T 749-2012 Green food-Edible mushroom
- NY/T 657-2007 Green food - Milk products
- GB/T 17336-1998 Determination of monascas colours in foods
- NY/T 1046-2006 Green food - Baked food
- NY/T 842-2004 Green food fish
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB 8818-2008 Food additive - Cocoa husk pigment
- GB/T 21915-2008 Determination of natamycin in food - By high-performance liquid chromatography
- GB/T 23749-2009 Determination of sodium copper chlorophyllin in foods-Spectrophotometric method
- GB/T 5009.150-2003 Determination of monascas colours in foods
- GB 4571-1996 Food additive -Lac dye
- GB 29685-2013 National food safety standards—Determination of Lincomycin, Clindamycin and Spectinomycin residues in animal derived food — Gas chromatography-mass spectrometry
- GB/T 5009.25-2003 Determination of sterigmatocystin in vegetable foods
- GB/T 31479-2015 Determination of colour fastness of dyed paper and board intended to come into contact with food
- GB 8818-1988 Food additive--Cacao pigment
- GB 14752-2010 Food additives Vitamin B2 (riboflavin)
National Health Commission of the People's Republic of China
- GB 5009.150-2016 National food safety standard-Determination of monascas colours in foods
- GB 1886.66-2015 National Food Safety Standard — Food Additives — Monascus yellow
- GB 1886.244-2016 National Food Safety Standard - Food Additives - Purple Sweet Potato Color
- GB 5009.25-2016 Determination of sterigmatocystin in vegetable foods
Professional Standard - Commodity Inspection
- SN/T 3625-2013 Determination of asarone in food for export. Liquid chromatographic method
- SN/T 4394-2015 Determination of bixin and norbixin in foods for export―LC method
- SN/T 3843-2014 Determination of monascorubin in foods for export
Anhui Provincial Standard of the People's Republic of China
- DB34/T 1537-2011 Determination of Curcumin in food Liquid chromatography
农业农村部
- NY/T 1889-2021 Green food-Roasted food
- NY/T 1330-2021 Green food-lnstant staple food
- NY/T 2107-2021 Green food-Filling of food
- NY/T 1040-2021 Green food-Edible salt
- NY/T 1512-2021 Green food-Uncooked processed food made of cereal
- NY/T 422-2021 Green food-Edible sugar
- NY/T 842-2021 Green food-Fish
Group Standards of the People's Republic of China
- T/YNBX 037-2021 Green high-quality agricultural products edible rose
- T/GDFDTAEC 07-2024 Determination of prohibited water-soluble synthetic colour in foods by liquid chromatography-tandem mass spectrometric method
- T/CSCB 0006-2021 Human retinal pigment epithelial cell
- T/ZJATA 0002-2020 Determination of Vitamin K2 in health foods— High performance liquid chromatography method
- T/SATA 032-2022 Determination of citrinin in foods—LC-MS/MS method
- T/GDFDTAEC 08-2024 Determination of prohibited fat-soluble synthetic colour in foods by liquid chromatography-tandem mass spectrometric method
- T/FJSP 0021-2023 Soy Vegetarian
- T/CNFIA 101-2017 Colouring foods for food industry
- T/YNBX 036-2021 Green high-quality agricultural products fresh grape
Agricultural Standard of the People's Republic of China
- 农业部1025号公告-21-2008 Determination of chloramphenicol residues in edible tissues of animal Gas chromatographic method
- 农业部1163号公告-2-2009 Gas chromatographic method for determination of Lineomycin and Spectinomycin residues in animal products
Yunnan Provincial Food Standard of the People's Republic of China
- DBS53/ 016-2013 Determination of Patulin in Food by Liquid Chromatography-Tandem Mass Spectrometry
German Institute for Standardization
- DIN CEN/TS 17303:2019-06*DIN SPEC 10703:2019-06 Foodstuffs - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments; German version CEN/TS 17303:2019
- DIN EN 14164:2014-08 Foodstuffs - Determination of vitamin B6 by high performance chromatography; German version EN 14164:2014
- DIN EN 14152:2014-08 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography; German version EN 14152:2014
- DIN EN 14148:2003-10 Foodstuffs - Determination of vitamin K1 by HPLC; German version EN 14148:2003
- DIN EN 14152:2003 Foodstuffs - Determination of vitamin B2 by HPLC; German version EN 14152:2003
- DIN EN 17882:2022-08 Food authenticity - DNA barcoding of meat and meat products derived from mammalia and poultry using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments; German and English version prEN 17882:2022 / Note: Date of issue 2022-07-08
- DIN EN 12857:1999-07 Foodstuffs - Determination of cyclamate - Method by high performance liquid chromatography; German version EN 12857:1999
- DIN EN 14122:2014-08 Foodstuffs - Determination of vitamin B1 by high performance liquid chromatography; German version EN 14122:2014
- DIN EN 15607:2009-09 Foodstuffs - Determination of d-biotin by HPLC; German version EN 15607:2009
- DIN EN 14148:2003 Foodstuffs - Determination of vitamin K1 by HPLC; German version EN 14148:2003
- DIN EN 17203:2019 Foodstuffs - Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
- DIN EN 1787:2000 Foodstuffs - Detection of irradiated food containing cellulose by ESR spectroscopy; German version EN 1787:2000
- DIN EN 17644:2022-09 Foodstuffs - Detection of food allergens by liquid chromatography-mass spectrometry (LC-MS) methods - General considerations; German version EN 17644:2022
- DIN EN 14122:2003 Foodstuffs - Determination of vitamin B1 by HPLC; German version EN 14122:2003
- DIN EN 12822:2014 Foodstuffs - Determination of vitamin E by high performance liquid chromatography - Measurement of α-, β-, γ- and δ-tocopherols; German version EN 12822:2014
- DIN EN 12822:2000 Foodstuffs - Determination of vitamin E by high performance liquid chromatography - Measurement of
-, -, - and -tocopherols; German version EN 12822:2000
European Committee for Standardization (CEN)
- CEN/TS 17303:2019 Foodstuffs - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- EN 14152:2014 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography
- EN 14148:2003 Foodstuffs - Determination of vitamin K1 by HPLC
- PREN 14152-2001 Foodstuffs - Determination of Vitamin B2 by HPLC
- EN 14122:2014 Foodstuffs - Determination of vitamin B1 by high performance liquid chromatography
- EN 12821:2009 Foodstuffs - Determination of vitamin D by high performance liquid chromatography - Measurement of cholecalciferol (D3) or ergocalciferol (D2)
SCC
- BS PD CEN/TS 17303:2019 Foodstuffs. DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- SN-CEN/TS 17303:2019 Foodstuffs - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- DANSK DS/CEN/TS 17303:2019 Foodstuffs – DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- DANSK DS/EN 14164:2014 Foodstuffs - Determination of vitamin B6 by high performance chromatography
- NS-EN 14164:2014 Foodstuffs — Determination of vitamin B6 by high performance chromatography
- NS-EN 14152:2003 Foodstuffs — Determination of vitamin B2 by HPLC
- UNE-ENV 14164:2007 EX Foodstuffs - Determination of vitamin B6 by HPLC
- UNE-EN 14164:2008 Foodstuffs - Determination of vitamin B6 by HPLC
- NS-EN 14122:2003 Foodstuffs — Determination of vitamin B1 by HPLC
- NS-EN 14148:2003 Foodstuffs — Determination of vitamin K1 by HPLC
- DANSK DS/EN 14152:2014 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography
- NS-EN 14122:2014 Foodstuffs — Determination of vitamin B1 by high performance liquid chromatography
- DANSK DS/EN 14152/AC:2006 Foodstuffs - Determination of vitamin B2 by HPLC
- DANSK DS/EN 12857:1999 Foodstuffs - Determination of cyclamate - High performance liquid chromatographic method
- NS-EN 12857:1999 Foodstuffs — Determination of cyclamate — High performance liquid chromatographic method
- DANSK DS/EN 14122/AC:2003 Foodstuffs - Determination of vitamin B1 by HPLC
- NS-EN 14164:2008 Foodstuffs — Determination of vitamin B6 by HPLC
- DANSK DS/EN 14122:2014 Foodstuffs - Determination of vitamin B1 by high performance liquid chromatography
- NS-EN 14152:2014 Foodstuffs — Determination of vitamin B2 by high performance liquid chromatography
- NS-EN 14130:2003 Foodstuffs — Determination of vitamin C by HPLC
- UNE-EN 14152:2004 FOODSTUFFS. DETERMINATION OF VITAMIN B2 BY HPLC.
- 12/30258761 DC BS EN 14122. Foodstuffs. Determination of vitamin B1 by HPLC
- 07/30163680 DC BS EN 14164. Foodstuffs. Determination of vitamin B6 by HPLC
- 12/30258767 DC BS EN 14164. Foodstuffs. Determination of vitamin B6 by HPLC
- NS-EN 17203:2021 Foodstuffs - Determination of citrinin in food by HPLC-MS/MS
- 12/30258764 DC BS EN 14152. Foodstuffs. Determination of vitamin B2 by HPLC
RU-GOST R
- GOST 33767-2016 Food additives. Methods for identification and determination of total coloring matter mass fraction in food colour anhocyanins E163
- GOST 34146-2017 Food additives. Methods for identification and determination of total coloring matter percentage of food colour curcumin E100
- GOST R 52825-2007 Food products. Method for determination of artificial colours in spices presence
- GOST 34151-2017 Foodstuffs. Determination of vitamin C by high performance liquid chromatography
- GOST EN 12857-2015 Foodstuffs. Determination of cyclamate. High performance liquid chromatographic method
- GOST R 52481-2010 Food colours. Terms and definitions
- GOST EN 14164-2014 Foodstuffs. Determination of vitamin B6 by HPLC
- GOST R 52481-2005 Food colours. Terms and definitions
- GOST EN 14148-2015 Foodstuffs. Determination of vitamin K1 by high performance liquid chromatographic method
- GOST EN 15607-2015 Foodstuffs. Determination of D-biotin by high performance liquid chromatography
- GOST R 52671-2006 Food products. Methods for identification and determination of artificial colours in caramel
- GOST EN 14152-2013 Foodstuffs. Determination of vitamin B2 by HPLC
- GOST EN 14122-2013 Foodstuffs. Determination of vitamin B1 by HPLC
- GOST R 56576-2015 Flour for pasta. Method for determination of yellow pigment
- GOST 32073-2013 Food products. Methods for identification and determination of artificial colours mass fraction in alcoholic production
CEN - European Committee for Standardization
- PD CEN/TS 17303:2019 Foodstuffs - DNA barcoding of fish and fish products using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- PREN 14152-2012 Foodstuffs - Determination of vitamin B2 by HPLC
- PREN 17203-2017 Foodstuffs - Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
- EN 17203:2018 Foodstuffs - Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
IN-BIS
- IS 2557-1963 Specification for annatto coloring for food use
- IS 1699-1974 Sampling and testing methods for food pigments
- IS 5346-1975 Specification for coating food color preparations and mixtures
GSO
- OS GSO 22:1984 METHODS OF TEST FOR COLOURING MATTER USED IN FOODSTUFFS
- GSO 22:1984 METHODS OF TEST FOR COLOURING MATTER USED IN FOODSTUFFS
VN-TCVN
- TCVN 6470-2010 Food additives.Test methods for food colours
- TCVN 6471-2010 Food additives.Test methods for flavouring agents
- TCVN 5164-2008 Foodstuffs.Determination of vitamin B1 by high performance liquid chromatography (HPLC)
- TCVN 5517-1991 Foodstuffs.Method for determination of water soluble synthetic organic colouring matter
KE-KEBS
- KS 05-230-1980 KENYA STANDARD SPECIFICATION FOR BRILLIANT BLUE, FCF,FOOD GRADE
Indonesia Standards
- SNI 01-2895-1992 Food colour (additives), Test methods
HU-MSZT
- MSZ 20650-1979 Dyes and pigments for food processing, technical specifications
- MSZ 20670/1.lap-1966 Inspection of dyeing and pigments used in food processing, organic pigments and color pastes used in artificial coloring, and chemical inspection of organic dyes
- MSZ 20670/4-1982 Inspection of dyeing and pigments used in food processing, determination of content of artificial color additives
AENOR
- UNE-EN 14164:2014 Foodstuffs - Determination of vitamin B6 by high performance chromatography
- UNE-EN 14152:2015 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography
- UNE-EN 12857:2001 Foodstuffs - Determination of cyclamate - High performance liquid chromatographic method
- UNE-EN 15607:2010 Foodstuffs - Determination of d-biotin by HPLC
- UNE-EN 14122:2014 Foodstuffs - Determination of vitamin B1 by high performance liquid chromatography
GOST
- GOST 33682-2015 Food products. Determination of T-2 toxin by chromatographic method
- GOST R EN 12857-2010 Foodstuffs. Determination of cyclamate. High performance liquid chromatographic method
British Standards Institution (BSI)
- BS EN 17203:2021 Foodstuffs. Determination of citrinin in food by HPLC-MS/MS
- BS EN 17203:2018 Foodstuffs. Determination of citrinin in food by liquid chromatography tandem mass spectrometry (LC-MS/MS)
- BS EN 15607:2009 Foodstuffs - Determination of d-biotin by HPLC
- 19/30399634 DC BS EN 17203. Foodstuffs. Determination of citrinin in food by HPLC-MS/MS
- BS EN 14152:2014 Foodstuffs. Determination of vitamin B2 by high performance liquid chromatography
- 22/30455160 DC BS EN 17882. Food authenticity. DNA barcoding of meat and meat products derived from mammalia and poultry using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- BS EN 14152:2003 Foodstuffs - Determination of vitamin B2 by HPLC
- BS EN 14148:2003 Foodstuffs - Determination of vitamin K1 by HPLC
- BS EN 17882:2024 Food authenticity. DNA barcoding of meat derived from mammals and birds using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
- DD CEN/TS 16233-1:2011 Foodstuffs. HPLC method for the determination of xanthophylls in fish flesh - Determination of astaxanthin and canthaxanthin
- BS EN 14130:2003 Foodstuffs - Determination of vitamin C by HPLC
- BS EN 14164:2008 Foodstuffs - Determination of vitamin B6 by HPLC
- BS EN 14164:2014 Foodstuffs. Determination of vitamin B6 by high performance chromatography
- BS EN 14122:2003 Foodstuffs - Determination of vitamin B1 by HPLC
International Organization for Standardization (ISO)
- ISO 13496:2000 Meat and meat products - Detection of colouring agents - Method using thin-layer chromatography
Association Francaise de Normalisation
- NF EN 14122:2014 Food products - Determination of vitamin B1 content by high performance liquid chromatography
- NF V03-134:2004 Foodstuffs - Determination of vitamin B2 by HPLC.
- NF EN 14152:2014 Food products - Determination of vitamin B2 content by high performance liquid chromatography
- NF EN 12857:2001 Produits alimentaires - Dosage du cyclamate - Méthode par chromatographie liquide haute performance
- NF V03-134*NF EN 14152:2014 Foodstuffs - Determination of vitamin B2 by high performance liquid chromatography
- NF V03-160*NF EN 15607:2009 Foodstuffs - Determination of d-biotin by HPLC.
- NF V03-003:1997 FOODSTUFFS. DETECTION OF IRRADIATED FOOD CONTAINING CELLULOSE. METHOD BY ESR SPECTROSCOPY. (EUROPEAN STANDARD EN 1787).
- NF V03-003:2001 Foodstuffs - Detection of irradiated food containing cellulose by ESR spectroscopy
- NF EN 15607:2009 Food products - Determination of d-biotin by High Performance Liquid Chromatography (HPLC)
- NF EN 14164:2014 Food products - Determination of vitamin B6 content by high performance liquid chromatography
- NF V03-135:2011 Food products - Determination of vitamin C by high performance liquid chromatography
- NF V03-136:2008 Foodstuffs - Determination of vitamin B6 by HPLC.
- NF V03-136*NF EN 14164:2014 Foodstuffs - Determination of vitamin B6 by high performance chromatography
- NF V03-133*NF EN 14122:2014 Foodstuffs - Determination of vitamin B1 by high performance liquid chromatography
- NF V03-133:2003 Foodstuffs - Determination of vitamin B1 by HPLC.
Lithuanian Standards Office
- LST EN 14122-2004 Foodstuffs - Determination of vitamin B1 by HPLC
- LST EN 14152-2004/AC-2005 Foodstuffs - Determination of vitamin B2 by HPLC
- LST EN 14152-2004 Foodstuffs - Determination of vitamin B2 by HPLC
- LST EN 14122-2004/AC-2005 Foodstuffs - Determination of vitamin B1 by HPLC
- LST EN 14164-2008 Foodstuffs - Determination of vitamin B6 by HPLC
- LST EN 12857-2000 Foodstuffs - Determination of cyclamate - High performance liquid chromatographic method
- LST EN 15607-2009 Foodstuffs - Determination of d-biotin by HPLC
- LST EN 14148-2004 Foodstuffs - Determination of vitamin K1 by HPLC
Danish Standards Foundation
- DS/EN 14122/AC:2006 Foodstuffs - Determination of vitamin B1 by HPLC
- DS/EN 14164:2008 Foodstuffs - Determination of vitamin B6 by HPLC
- DS/EN 15607:2009 Foodstuffs - Determination of d-biotin by HPLC
- DS/EN 14152/AC:2006 Foodstuffs - Determination of vitamin B2 by HPLC
- DS/EN 12857:1999 Foodstuffs - Determination of cyclamate - High performance liquid chromatographic method
- DS/EN 14122:2003 Foodstuffs - Determination of vitamin B1 by HPLC
- DS/EN 14152:2003 Foodstuffs - Determination of vitamin B2 by HPLC
- DS/EN 14148:2003 Foodstuffs - Determination of vitamin K1 by HPLC
- DS/EN 17203:2021 Foodstuffs – Determination of citrinin in food by HPLC-MS/MS
GOSTR
- GOST 31694-2012 Food products, food raw materials. Method of determination of the antibiotic residues of tetracycline group by High performance Liquid Chromatography. Mass spectrometry
- GOST 34140-2017 Food products, feed, food raw materials. Method for determination of mycotoxins by high performance liquid chromatography-mass spectrometry
- GOST 34137-2017 Food products, food raw materials. Method for determination of the residual content cephalosporins by high performance liquid chromatography - mass spectrometry
- GOST 34678-2020 Food products, food raw materials. Method for determination of the residual content of polypeptide antibiotics by high performance liquid chromatography-mass spectrometry
BSI
- DANSK DS/EN 17882:2024 Food authenticity – DNA barcoding of meat derived from mammals and birds using defined mitochondrial cytochrome b and cytochrome c oxidase I gene segments
IX-EU/EC
- 95/45/EC-1995 Commission Directive Laying Down Specific Purity Criteria Concerning Colours for Use in Foodstuffs
ES-UNE
- UNE-EN 17644:2022 Foodstuffs - Detection of food allergens by liquid chromatography - mass spectrometry (LC-MS) methods - General considerations
- UNE-EN 17203:2022 Foodstuffs - Determination of citrinin in food by HPLC-MS/MS
CU-NC
- NC 76-05-1985 Foodstuffs. B1 and G1, Aflatoxins and A Ocratoxin. Spectrophotometric Determination of Concentration and Chromatographic Purity Degree