National Food Safety Standard Determination of Titanium Dioxide in Foods
1 Scope
This standard specifies the inductively coupled plasma - atomic emission spectrometry and diantipyryl methane colorimetric method for titanium dioxide in foods.
This standard is applicable to the determination of titanium dioxide in flour, jam, cool fruits, glycyrrhiza products, dehydrated potatoes, fried nuts and seeds, candy (including gum candy), cocoa products, chocolate and chocolate products (including chocolate with cocoa butter alternatives and its products), coating of candy and of candy & chocolate products, decorative candy, cresting, sweet juice, flavored syrup, mayonnaise, salad dressing, powdered beverages, jelly, puffed food, beverage turbidity agent and konjac gel products.
Method I Inductively Coupled Plasma - Atomic Emission Spectrometry (ICP-AES)
2 Principle
After being digested in acid, the specimen is analyzed with inductively coupled plasma atomic emission spectrometer and quantized by standard curve external standard method.
3 Reagents and Materials
Unless otherwise specified, the reagents adopted in this method are all analytically pure, and the water is Grade 2 water specified in GB/T 6682.
3.1 Reagents
3.1.1 Perchloric acid (HClO4): guaranteed reagent.
3.1.2 Sulfuric acid (H2SO4): guaranteed reagent.
3.1.3 Nitric acid (HNO3): guaranteed reagent
3.1.4 Ammonium sulfate [(NH4)2SO4].
3.2 Reagent preparation
3.2.1 Sulfuric acid solution (5+95): measure 50mL of sulfuric acid, put it into 950mL of water slowly and mix them uniformly.
3.2.2 Mixed acid [perchloric acid + nitric acid (1+9)]: measure 100ml of perchloric acid, put it into 900mL of nitric acid slowly and mix them uniformly.
3.3 Standard substance
Titanium dioxide (TiO2): reference reagent or spectrally pure reagent.
3.4 Preparation of standard solution
3.4.1 Standard stock solution of titanium (1 000μg/mL): weigh 0.167g of titanium dioxide, add 5g of ammonium sulfate and 10mL of sulfuric acid, heat them until they are dissolved, then cool and transfer the solution to a 100mL volumetric flask, dilute to the scale and mix it uniformly. Or use the state-certified standard solution with reference material certificate.
3.4.2 Standard working solution of titanium (10.0μg/mL): pipet 1.00mL of standard stock solution of titanium and put it into a 100mL volumetric flask, then dilute with sulfuric acid solution (5+95) to the scale.
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Specimen Preparation
6 Analytical Procedures
7 Expression of Analysis Results
8 Precision
9 Others
10 Principle
11 Reagents and Materials
12 Instruments and Apparatus
13 Specimen Preparation
14 Analytical Procedures
15 Expression of Analysis Results
16 Precision
17 Limit of Detection and Limit of Quantitation
Appendix A Reference Working Conditions for Microwave Digestion and ICP-AES Apparatus
Standard
GB 5009.246-2016 National Food Safety Standard - Determination of titania in food (English Version)
Standard No.
GB 5009.246-2016
Status
valid
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
100.0
Implemented on
2017-3-1
Delivery
via email in 1 business day
Detail of GB 5009.246-2016
Standard No.
GB 5009.246-2016
English Name
National Food Safety Standard - Determination of titania in food
National Food Safety Standard Determination of Titanium Dioxide in Foods
1 Scope
This standard specifies the inductively coupled plasma - atomic emission spectrometry and diantipyryl methane colorimetric method for titanium dioxide in foods.
This standard is applicable to the determination of titanium dioxide in flour, jam, cool fruits, glycyrrhiza products, dehydrated potatoes, fried nuts and seeds, candy (including gum candy), cocoa products, chocolate and chocolate products (including chocolate with cocoa butter alternatives and its products), coating of candy and of candy & chocolate products, decorative candy, cresting, sweet juice, flavored syrup, mayonnaise, salad dressing, powdered beverages, jelly, puffed food, beverage turbidity agent and konjac gel products.
Method I Inductively Coupled Plasma - Atomic Emission Spectrometry (ICP-AES)
2 Principle
After being digested in acid, the specimen is analyzed with inductively coupled plasma atomic emission spectrometer and quantized by standard curve external standard method.
3 Reagents and Materials
Unless otherwise specified, the reagents adopted in this method are all analytically pure, and the water is Grade 2 water specified in GB/T 6682.
3.1 Reagents
3.1.1 Perchloric acid (HClO4): guaranteed reagent.
3.1.2 Sulfuric acid (H2SO4): guaranteed reagent.
3.1.3 Nitric acid (HNO3): guaranteed reagent
3.1.4 Ammonium sulfate [(NH4)2SO4].
3.2 Reagent preparation
3.2.1 Sulfuric acid solution (5+95): measure 50mL of sulfuric acid, put it into 950mL of water slowly and mix them uniformly.
3.2.2 Mixed acid [perchloric acid + nitric acid (1+9)]: measure 100ml of perchloric acid, put it into 900mL of nitric acid slowly and mix them uniformly.
3.3 Standard substance
Titanium dioxide (TiO2): reference reagent or spectrally pure reagent.
3.4 Preparation of standard solution
3.4.1 Standard stock solution of titanium (1 000μg/mL): weigh 0.167g of titanium dioxide, add 5g of ammonium sulfate and 10mL of sulfuric acid, heat them until they are dissolved, then cool and transfer the solution to a 100mL volumetric flask, dilute to the scale and mix it uniformly. Or use the state-certified standard solution with reference material certificate.
3.4.2 Standard working solution of titanium (10.0μg/mL): pipet 1.00mL of standard stock solution of titanium and put it into a 100mL volumetric flask, then dilute with sulfuric acid solution (5+95) to the scale.
Contents of GB 5009.246-2016
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Specimen Preparation
6 Analytical Procedures
7 Expression of Analysis Results
8 Precision
9 Others
10 Principle
11 Reagents and Materials
12 Instruments and Apparatus
13 Specimen Preparation
14 Analytical Procedures
15 Expression of Analysis Results
16 Precision
17 Limit of Detection and Limit of Quantitation
Appendix A Reference Working Conditions for Microwave Digestion and ICP-AES Apparatus