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Determination of sodium iron (Ⅲ) ethylenediaminetetraacetate trihydrate (NaFeEDTA·3H2O) in iron fortified soy sauce
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Basic data
| Standard ID | GB/T 21234-2007 (GB/T21234-2007) |
| Description (Translated English) | Determination of sodium iron (��) ethylenediaminetetraacetate trihydrate (NaFeEDTA��3H2O) in iron fortified soy sauce |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | C53 |
| Classification of International Standard | 67.040 |
| Word Count Estimation | 8,866 |
| Date of Issue | 2007-10-29 |
| Date of Implementation | 2008-04-01 |
| Regulation (derived from) | China National Standard Approval Announcement2007 No.12 (Total No.112) |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This standard specifies the method for determination of iron fortified soy sauce in sodium iron EDTA (NaFeEDTA)'s. This standard applies to iron-fortified soy sauce in sodium iron EDTA side fixed. This standard of the first method detection limit of 0. 030 ��g/mL, when the sampling is 2. 5mL, the minimum detectable concentration was 6. 0 ��g/mL, the best linear range of 0. 2 ��g/mL ~ 20 ��g/mL. The minimum detection limit of the second law of 0. 24 ��g/mL, when sampling is 3. 0 mL, the minimum detectable concentration was 40 ��g/mL, the best linear range of 4. 0 ��g/mL ~ 24 ��g/mL. |
GB/T 21234-2007: Determination of sodium iron (Ⅲ) ethylenediaminetetraacetate trihydrate (NaFeEDTA·3H2O) in iron fortified soy sauce
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Determination of sodium iron (Ⅲ) ethylenediaminetetraacetate trihydrate (NaFeEDTA · 3H2O) in iron fortified soy sauce
ICS 67.040
C53
National Standards of People's Republic of China
Determination of soy sauce sodium iron EDTA iron-fortified
Posted 2007-10-29
2008-04-01 implementation
People's Republic of China Ministry of Health
Standardization Administration of China released
Foreword
This standard is proposed and administered by the People's Republic of China Ministry of Health.
The standard by the China Disease Prevention and Control Center of Nutrition and Food Safety, Foshan Haitian Flavoring Food Co., Ltd. is responsible for drafting.
The main drafters of this standard. Huo Junsheng, Huang Jian, Wei Feng, Huangwen Biao, Yu Bo, Sun Jing.
Determination of soy sauce sodium iron EDTA iron-fortified
1 Scope
This standard specifies the method for determination of iron fortified soy sauce sodium iron EDTA (NaFeEDTA) of.
This standard applies to the determination of iron fortified soy sauce sodium iron EDTA.
This standard is the first detection limit was 0.030μg/mL, when sampling is 2.5mL, the minimum detectable concentration of 6.0μg/mL, the best
The linear range of 0.2μg/mL ~ 20μg/mL. The minimum detection limit of the second method is 0.24μg/mL, when sampling is 3.0mL, the lowest
Detectable concentration of 40μg/mL, the optimal linear range of 4.0μg/mL ~ 24μg/mL.
The first method HPLC
Principle 2
Iron fortified soy sauce sample, after precipitated in methanol, filtered, diluted with ion-pair reversed-phase high performance liquid chromatography in sodium iron EDTA
The FeEDTA- and separation of impurities in the sample, the UV detector at 254nm wavelength detection, based on peak retention time qualitative criteria
Curve peak area.
3 Reagents
The reagents used in the process, unless otherwise specified, reagents were of analytical grade, distilled water or water of equivalent purity water.
3.1 Methanol. chromatographically pure.
3.2 40% tetrabutyl ammonium hydroxide solution (TBAOH).
Dilute acid solutions 3.3. The formulation was diluted 10-fold with water of 88% formic acid.
3.4 sodium iron EDTA standard. purity (to NaFeEDTA · 3H2O meter) ≥99.0%.
3.5 75% methanol solution. a volume of 750mL of methanol was added to a volume of 250mL of water, and mix.
3.6 sodium iron EDTA standard stock solution. accurately weighed sodium iron EDTA standard 0.1g, into 50mL brown container
Flask, dissolved in water and diluted to the mark, shake, solution concentration of 2000μg/mL. From light in the refrigerator, it is recommended 15 days
use.
3.7 EDTA iron sodium intermediate standard solution. Imbibe sodium iron EDTA standard stock solution 2.50mL, placed
50mL brown volumetric flask, with 75% methanol solution to volume, shake, and this solution at a concentration of 100μg/mL. From light in the refrigerator, it is recommended
15 days of use.
3.8 sodium iron EDTA solution using the standard. Pipette iron EDTA sodium intermediate standard solution, 1.0mL, 2.0mL,
4.0mL, 6.0mL, 8.0mL, 10.0mL in 50mL volumetric flask, add water to volume, after shaking, to obtain EDTA
Sodium iron standard series, each containing NaFeEDTA · 3H2O was 2.0μg/mL, 4.0μg/mL, 8.0μg/mL, 12.0μg/mL,
16.0μg/mL, 20.0μg/mL. Pro formulated with time.
4 equipment and instruments
4.1 commonly used laboratory equipment.
4.2 High performance liquid chromatograph. with a UV detector.
4.3 pH meter.
...
