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GB 17511.1-2008: Food Additive -- Allura red
Status: Obsolete GB 17511.1: Evolution and historical versions
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| GB 17511.1-2008 | English | 679 |
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Food Additive -- Allura red
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GB 17511.1-2008
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| GB 17511.1-1998 | English | 639 |
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Food additive. Fancy (Allura) red
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PDF similar to GB 17511.1-2008
Basic data | Standard ID | GB 17511.1-2008 (GB17511.1-2008) | | Description (Translated English) | Food Additive -- Allura red | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 17,111 | | Date of Issue | 2008-06-25 | | Date of Implementation | 2009-01-01 | | Older Standard (superseded by this standard) | GB 17511.1-1998 | | Quoted Standard | GB/T 601; GB/T 602; GB/T 603; GB/T 5009.76-2003; GB/T 6682-2008 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 12 of 2008 (No. 125 overall) | | 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 Chinese standard specifies the requirements for food additives, Allura Red, test methods, inspection rules and signs, packaging, transportation and storage. This standard applies consists of 4 amino 5 methoxy-2 methyl benzene diazonium later with a 6 hydroxy-2 naphthalene sulfonate coupling, salting, refined dye. The product can be added to foods, drugs, cosmetics, used as a coloring agent. | GB 17511.1-2008: Food Additive -- Allura red---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Food Additive.Allura red
ICS 67.220.20
X42
National Standards of People's Republic of China
Replacing GB 17511.1-1998
Allura Red Food Additives
Posted 2008-06-25
2009-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
4.2 and 7.1 of this standard are mandatory, the rest are recommended.
This standard and the Japanese "food additives officially" Seventh Edition (1999) (edible Red No. 40, Allura Red) non-equivalent.
This standard replaces GB 17511.1-1998 "the temptation red food additives."
This standard compared with GB 17511.1-1998, the main changes are as follows.
--- The appearance from dark red powder changed to a dark red powder or granules (1998 version 3.1, this version 4.1);
--- The identification method was revised (1998 edition 4.2.3.1,4.2.3.2 edition of 5.2.3.1,5.2.3.2);
--- Arsenic, heavy metals, determination of lead, according to GB/T 5009 in the provisions of (1998 edition 4.13,4.14,4.15, Excerpts
5.14,5.15,5.16);
--- Spectrophotometric colorimetry parallel determination of allowable difference from 2% revised to 1.0% (1998 version 4.3.2.8, this edition 5.3.2.8);
--- Determination of chloride and sulfate content had been revised (1998 edition 4.4.2,4.4.3, this edition 5.5.1,5.5.2);
--- Loss on drying with chloride and sulfate content of control (1998 version 3.2, this version 4.2);
--- The determination of unsulfonated primary aromatic amine (aniline dollars) the total content by liquid chromatography modify chemical analysis (1998 edition
4.12, this version 5.13).
The Standard Annexes A and B are normative appendix.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee Dye (SAC/TC134) and the National Standardization Technical Committee on Food Additives
(SAC/TC11) centralized.
This standard was drafted. Shanghai Dyestuffs Research Institute Co., Ltd., Tianjin multi Fuyuan Industrial Co., Ltd., Shenyang Chemical Research Institute.
The main drafters of this standard. Mackay sound, plums will, Pu Aijun, Gretchen red, Dengsong Pei, Xiao Jie.
This standard was first published in 1998.
Allura Red Food Additives
1 Scope
This standard specifies the requirements for food additives, Allura Red, test methods, inspection rules and signs, packaging, transportation and storage.
This standard applies to 4-amino-5-methoxy-2-methyl benzene diazonium after with 6-hydroxy-2-naphthalene sulfonate coupling, salting and refining
From the dye. The product can be added to food, drugs, cosmetics, used as a coloring agent.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Preparation of GB/T 601 chemical reagent standard titration solution
Preparation of standard solution of GB/T 602 Determination of impurities in chemical reagents
GB/T 603 chemical reagent in test methods - Preparations with
Determination of GB/T 5009.76-2003 arsenic in food additives
GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD)
3 chemical name, structural formula, molecular formula and relative molecular mass
Chemical Name. 6-hydroxy-5 - [(2-methoxy-5-methyl-benzene sulfonyl) azo] -2-naphthalenesulfonic acid disodium salt
Structure.
Among Teachers
Division
Division division division
Qiao Qiaoqiao
NNaO3 S
OCH3
H3C
Normal Normal Normal Normal Normal Normal
Among Teachers
Division N
Among Teachers
Division division division
Qiao Qiaoqiao
HO
SO3Na
Molecular formula. C18H14N2Na2O8S2
Molecular weight. 496.42 (according to 2007 international relative atomic mass)
4 Requirements
4.1 Appearance
Dark red powder or granules.
4.2 Technical Requirements
Allura Red Food additives shall comply with the provisions in Table 1.
Table 1 Allura Red Food Additive requirements
Item Index
Allura Red, /% ≥ 85.0
Loss on drying, /% ≤ 10.0
Chloride (NaCl) and sulfate (Na2SO4 to count), /% ≤ 5.0
Table 1 (continued)
Item Index
Water-insoluble, /% ≤ 0.20
Low deputy sulfonated dye, /% ≤ 1.0
Deputy High sulfonated dye, /% ≤ 1.0
6-hydroxy-5 - [(2-methoxy-5-methyl-benzene sulfonyl) azo] -8- (2-methoxy-5-methyl-4-sulfophenoxy ) -2-naphthalene sulfonic acid
Disodium salt, /% ≤ 1.0
Hydroxy-2-naphthalene sulfonate, /% ≤ 0.30
4-amino-5-methoxy-2-methyl-benzenesulfonic acid, /% ≤ 0.20
Oxo-6,6 - bis (2-naphthalene sulfonic acid) disodium salt, /% ≤ 1.0
Unsulfonated primary aromatic amine (aniline dollars), /% ≤ 0.01
Arsenic (As), /% ≤ 0.0001
Heavy metals (Pb), /% ≤ 0.002
Lead (Pb), /% ≤ 0.001
5 Test methods
The standard reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 specified three
Grade water. Standard test solution required impurity standard solution, preparations and products at the time did not indicate other provisions, according to GB/T 601,
GB/T 602, GB/T 603 provisions formulated.
5.1 Appearance
Under natural light conditions was visually measured. This product is a dark red powder or granules.
5.2 Identification
5.2.1 Reagents
5.2.1.1 sulfuric acid;
5.2.1.2 ammonium acetate solution. 1.5g/L.
5.2.2 Equipment
5.2.2.1 spectrophotometer;
5.2.2.2 cuvette. 10mm.
5.2.3 Analysis of step
5.2.3.1 Weigh about 0.1g sample, accurate to 0.001g. It was dissolved in 100mL of water, red clear solution.
5.2.3.2 Weigh about 0.2g sample, accurate to 0.001g. Sulfuric acid dissolved in 20mL, was dark purple, chose this solution (2-3) drops added
5mL water, shake, red.
5.2.3.3 Weigh about 0.1g sample, accurate to 0.001g. Was dissolved in 100mL ammonium acetate solution of this solution 1mL, add ammonium acetate
To the solution with 100mL, wavelength of maximum absorption of the solution was (499 ± 2) nm.
5.3 Determination of the content of the temptation to red
5.3.1 titanium trichloride titration (Arbitration Act)
5.3.1.1 Method summary
In acidic medium, the azo dye reducing titanium trichloride group is broken down into amino compounds, according to the titanium trichloride standard titration solution consumption
Amount, calculate the content of the mass fraction.
5.3.1.2 Reagents and materials
5.3.1.2.1 sodium bitartrate;
5.3.1.2.2 titanium trichloride standard titration solution. Ba (TiCl3) = 0.1mol/L (now with the existing, standardized method of preparation see Appendix A);
5.3.1.2.3 cylinders loaded carbon dioxide.
5.3.1.3 Equipment
See Figure 1.
A --- conical flask (a 500 mL);
B --- brown burette (50mL);
C --- package under glass bottle of black paper (2000mL);
D --- Sheng 100g/L ammonium carbonate and 100g/L ferrous sulfate equivalent mixture container (5000mL);
E --- piston;
F --- bottles;
G --- washing bottle filled with water.
Figure 1 titanium trichloride titration apparatus of FIG.
5.3.1.4 analysis step
Weigh about 5g samples, accurate to 0.0002g. Was dissolved in 100mL and cooled to room temperature, freshly boiled water, 500mL capacity moved
Bottle diluted with water to the mark. Imbibe this solution 50mL set 500mL conical flask, sodium hydrogen tartrate and 15g
Water 150mL, after shaking dissolved, according to FIG. 1 installed equipment at surface through carbon dioxide at the same time, heated to boiling, and treated with titanium trichloride standard
Titration solution was titrated to its natural color disappears as the end point.
5.3.1.5 Calculation Results
Allura Red content mass fraction of 1% to the value expressed by the formula (1).
1 =
(Vp/1000) × Ba × (M/4)
100 (1)
Where.
Numerical titanium trichloride standard titration Vp --- titration solution consumed by the sample volume in milliliters (mL);
The actual value of the concentration of Ba --- titanium trichloride standard titration solution, expressed in moles per liter (mol/L);
Numerical molar mass M --- Allura Red, in units of grams per mole (g/mol) (M = 496.42).
The results represent a decimal.
5.3.1.6 allowable difference
Arithmetic mean of two parallel determination results as a measurement result, two parallel determination results is not more than 1.0% absolute difference.
5.3.2 spectrophotometric colorimetry
5.3.2.1 Method summary
After the dissolution of the sample with a known amount of water, respectively, the temptation red standard sample, the maximum absorption wavelength, were measured absorbance, then
Calculate the content of the mass fraction.
5.3.2.2 Reagents
5.3.2.2.1 ammonium acetate solution. 1.5g/L;
5.3.2.2.2 Allura Red Standards. Content (mass fraction) ≥85.0% (titanium trichloride titration method).
5.3.2.3 Equipment
5.3.2.3.1 spectrophotometer;
5.3.2.3.2 cuvette. 10mm.
Preparation of standard solutions 5.3.2.4 Allura Red
It weighs about 0.5g Allura Red standard samples, accurate to 0.0002g. Dissolved in an appropriate amount of ammonium acetate, and transferred to 1000mL volumetric flask
, Add ammonium acetate solution was diluted to the mark. Draw 10mL, transferred to 500mL volumetric flask, add ammonium acetate solution was diluted to the mark,
Shake well.
5.3.2.5 Allura Red formulated sample solution
Weigh about 0.5g Allura Red specimen to the nearest 0.0002g. Following the same 5.3.2.4.
5.3.2.6 analysis step
The standard solution and red temptations red temptations sample solution were placed in 10mm cuvettes, with at (499 ± 2) nm wavelength using spectroscopic
Photometer respective absorbance ammonium acetate solution as reference solution.
5.3.2.7 Calculation Results
Allura Red content mass fraction of 2% to the value indicated by the formula (2).
2 = AAs ×
s (2)
Where.
A --- temptation to red absorbance of the test solution;
As --- Temptation red standard sample solution absorbance;
s --- Temptation red standard sample content mass fraction (titanium trichloride titration method) values, in%.
The results represent a decimal.
5.3.2.8 allowable difference
Arithmetic mean of two parallel determination results as a measurement result, two parallel determination results is not more than 1.0% absolute difference.
5.4 Determination of loss on drying
5.4.1 Analysis of step
Weigh about 2g samples, accurate to 0.001g. Quality has been placed in a constant (30 ~ 40) mm weighing bottle, at (135 ± 2) ℃ constant temperature
Drying oven to constant mass.
5.4.2 Calculation Results
Loss on drying of the mass fraction of 3% to the value indicated by the formula (3) Calculated.
100 (3)
Where.
The results represent a decimal.
5.4.3 allowable difference
Arithmetic mean of two parallel determination results as a measurement result, two parallel determination results is not more than 0.2% absolute difference.
5.5.1.1 Reagents and materials
5.5.1.1.1 nitrobenzene;
5.5.1.1.2 Activated carbon;
5.5.1.1.3 nitrate solution. 1 + 1;
5.5.1.1.4 silver nitrate solution. Ba (AgNO3) = 0.1mol/L;
5.5.1.1.5 ammonium ferric sulfate solution;
Preparation method. Weigh 14g of ammonium ferric sulfate, dissolved in 100mL water, filtered, add nitric acid solution 10mL, stored in a brown bottle.
5.5.1.1.6 ammonium thiocyanate standard titration solution. Ba (NH4CNS) = 0.1mol/L.
5.5.1.2 preparation of the test solution
Weigh about 2g samples, accurate to 0.001g. Was dissolved in 150mL of water, activated carbon 10g, gentle boil (2 ~ 3) min. Cool to
Room temperature, nitric acid solution 1mL, continue to shake evenly placed 30min (during shaking from time to time). Filtered through a dry filter paper. As there filtrate
Color, coupled with the activated carbon 2g, shaking occasionally placed under 1h, then dried filter paper (such as color still repeat to replace the activated carbon filter
Colorless liquid). 10mL each wash with water three times activated carbon, and the filtrate were combined and moved to the 250mL volumetric flask, add water to the mark. For
Determination of chloride and sulfate content.
5.5.1.3 analysis step
Pipette 50mL test solution was placed in 500mL conical flask, was added a solution of silver nitrate and nitric acid 2mL 10mL (chloride content
A long time to add more) and nitrobenzene 5mL, shake vigorously to silver chloride coagulation, ferric ammonium sulfate solution was added 1mL, ammonium thiocyanate standard titration
Titrate the excess silver nitrate to the end and keep 1min, at the same time in the same way to make a blank test.
5.5.1.4 Calculation Results
Chloride (as NaCl) mass fraction of 4% to the value indicated by the formula (4) Calculated.
4 =
[(1- Vp Vp)/1000] × × M Ba
100 (4)
Where.
Vp --- titration sample consumption volume of ammonium thiocyanate standard titration solution, in milliliters (mL);
Vp 1 --- blank titration solution consumed volume of ammonium thiocyanate standard titration solution, in milliliters (mL);
Ba --- ammonium thiocyanate standard titration solution concentration, in units of moles per liter (mol/L);
--- The M NaCl molar mass of the units of grams per mole (g/mol) (M = 58.4).
The results represent a decimal.
5.5.1.5 allowable difference
Arithmetic mean of two parallel determination results as a measurement result, two parallel determination results is not more than 0.3% absolute difference.
5.5.2 Determination of Sulfate (N Rao 2SO4) content of
5.5.2.1 Reagents
5.5.2.1.1 sodium hydroxide solution. 0.2g/L;
5.5.2.1.2 hydrochloric acid solution. 1 + 99;
5.5.2.1.3 barium chloride standard titration solution. Ba (1/2BaCl2) = 0.1mol/L (method of preparation refer to normative Annex B);
5.5.2.1.4 phenolphthalein indicator solution. 10g/L;
5.5.2.1.5 Rose sodium indicator solution. Weigh 0.1g of sodium red roses, was dissolved in 10mL of water (using now).
5.5.2.2 analysis step
Draw 25mL test solution (5.5.1.2), placed in 250mL conical flask, add 1 drop of phenolphthalein indicator solution, sodium hydroxide solution was added dropwise
Pink, then a solution of hydrochloric acid solution to the pink disappears, shake, shaking constantly dissolved under barium chloride standard titration solution titration, roses
Sodium liquid red indicator solution for outdoor instruction, presented on paper rose red spots to maintain 2min does not fade as the end point.
At the same time in the same manner as a blank test.
5.5.2.3 Calculation Results
Sulfate (Na2SO4 meter) mass fraction of 5% to the value expressed by the formula (5) Calculated.
5 =
(1- Vp Vp 2)/1000 × Ba × (M/2)
100 (5)
Where.
Vp 1 --- titration solution consumed volume of barium chloride standard titration solution of value in milliliters (mL);
Vp 2 --- titrate blank solution consumed volume of barium chloride standard titration solution of value in milliliters (mL);
--- The actual value Ba barium chloride standard titration solution concentration, expressed in moles per liter (mol/L);
The molar mass values of the M --- sodium sulfate, units of grams per mole (g/mol) (M = 142.04);
The results represent a decimal.
5.5.2.4 allowable difference
Arithmetic mean of two parallel determination results as a measurement result, two parallel determination results is not more than 0.2% absolute difference.
Chloride (NaCl) and sulfate (Na2SO4 to count) the sum of the mass fraction content of 6% to the value indicated by the formula (6)
Calculated.
6 + 4 = 5 (6)
Where.
4 --- chloride (as NaCl) mass fraction, in%;
5 --- Sulfate (Na2SO4 meter) mass fraction, expressed as a%.
The results represent a decimal.
5.6 Determination of water-insoluble content
5.6.1 Instruments
5.6.1.1 G4 sintered glass crucible;
5.6.1.2 thermostatic oven.
5.6.2 Analysis of step
Weigh about 3g samples, accurate to 0.001g. Placed in 500mL beaker, was added (50 ~ 60) ℃ 250mL of water, and dissolved with
Has been ℃ drying to constant quality glass sand core crucible filtered (135 ± 2), and thoroughly washed with hot water to the washing liquid is colorless, at (135 ± 2) ℃ constant
Temperature oven drying to constant mass.
5.6.3 Calculation Results
The mass fraction of water-insoluble 7, expressed in%, according to equation (7) Calculated.
100 (7)
Where.
The results represent two decimal.
5.6.4 allowable difference
The arithmetic average of the two parallel determination results as the measurement results, the results of two parallel determination of the absolute difference is not more than 0.05%.
5.7 Determination of low dye content of sulfonated deputy
5.7.1 Reagents
5.7.1.1 methanol;
5.7.1.2 ammonium acetate solution. 7.8g/L.
5.7.2 Equipment
5.7.2.1 LC. --- infusion pump flow range (0.1 ~ 5.0) mL/min, the flow rate in this range stability ± 1%;
Detector --- multi-wavelength UV spectrophotometric detector or equivalent in performance to UV spectrophotometric detector;
5.7.2.2 Column. length 150mm, an inner diameter of 4.6mm stainless steel column, stationary phase C18, particle size 5μm;
5.7.2.3 Data Processor. chromatography workstation or full scale (1 ~ 5) mV recorder;
5.7.2.4 ultrasonic generator;
5.7.2.5 Loop. 20μL.
5.7.3 chromatographic conditions
5.7.3.1 The detection wavelength. 515nm;
5.7.3.2 Column temperature. 40 ℃;
5.7.3.3 Mobile phase. a) a solution of ammonium acetate; b) methanol;
Concentration gradient. 50min linear concentration gradient from A.B (100.0) to A.B (0.100);
5.7.3.4 Flow. 1mL/min;
5.7.3.5 Injection volume. 20μL.
According to the different instruments, choose the best analytical conditions corresponding flow after shaking degassed by ultrasonic generator.
5.7.4 preparation of test solution
Weigh about 0.01g Allura Red sample, accurate to 0.0002g. Plus ammonium acetate solution to dissolve and dilute to 100mL.
5.7.5 preparation of standard solution
Weigh placed Chris Sittingbourne acid β- naphthol azo vacuum drier 24h after about 0.01g, accurate to 0.0002g. Dissolved
After 5mL methanol, treated with ammonium acetate solution to volume 100mL. Also weighed into chocolate Sittingbourne azo vacuum drier after 24h
Xue Fr salt about 0.01g, accurate to 0.0002g. Dissolved ammonium acetate solution and dilute to 100mL. Pipette the solution of each
10mL, respectively ammonium acetate solution to volume 100mL, as solutions A and B. Then Pipette 10.0mL,
5.0mL, 2.0mL, 1.0mL of the solution A and solution B, respectively ammonium acetate solution to volume 100mL. As a series of standards
Solution.
5.7.6 Analysis of step
5.7.3 Under the test conditions specified, Pipette test solution and standard solution is injected with a syringe and filled with micro-quantitative ring
Chromatography, pending completion of the last component of the outflow, the result of processing. Each material was measured peak area of standard solution, the standard curve plotted.
Test solution Sittingbourne acid azo chocolate and chocolate Sittingbourne β- naphthol azo Xue Fr salt peak area, calculated according to a standard curve for each
Since the amount of material, and then seek its close value.
5.8 Determination of high content of sulfonated vice dye
5.8.1 Reagents
With this standard 5.7.1.
5.8.2 Equipment
With this standard 5.7.2.
5.8.3 chromatographic conditions
With this standard 5.7.3.
5.8.4 preparation of test solution
With this standard 5.7.4.
5.8.5 preparation of standard solution
They were weighed in a vacuum drier 24h after Chris Sittingbourne sulfonic acid salts, and azo G Chris Sittingbourne acid azo R salt about
0.01g, accurate to 0.0002g, were dissolved in ammonium acetate solution and dilute to 100mL. Pipette the solution of each 10mL, and points
Do not use ammonium acetate solution to volume 100mL, as solutions A and B. Then Pipette 10.0mL, 5.0mL,
2.0mL, 1.0mL of the solution A and solution B, with ammonium acetate solution to volume 100mL. Solution as a series of standards.
5.8.6 Analysis of step
5.7.3 Under the test conditions specified, Pipette test solution and standard solution is injected with a syringe and filled with micro-quantitative ring
Chromatography, pending completion of the last component of the outflow, the result of processing. Measured peak area of each standard solution of a material, made from the standard curve.
Test solution gf Sittingbourne sulfonic acid salts, and azo G Chris Sittingbourne acid azo R salt peak area, according to the respective standard curve was obtained
The amount of quality, value and then seek its cooperation.
5.9 6-hydroxy-5 - [(2-methoxy-5-methyl-benzene sulfonyl) azo] -8- (2-methoxy-5-methyl-4-sulfo- phenoxy) -2-naphthalenesulfonic acid disodium
Determination of salt content
5.9.1 Reagents
With this standard 5.7.1.
5.9.2 Equipment
With this standard 5.7.2.
5.9.3 chromatographic conditions
With this standard 5.7.3.
5.9.4 preparation of test solution
With this standard 5.7.4.
5.9.5 preparation of standard solution
-5-Hydroxy-6- weighed into a vacuum desiccator after 24h - [(2-methoxy-5-methyl-benzene sulfonyl) azo] -8- (2-methoxy -
Methyl-4-sulfo-phenoxy) -2-naphthalenesulfonic acid disodium salt to about 0.01g, with accuracy of 0.0002g. Dissolved ammonium acetate solution and dilute to
100mL. The draw solution 10mL, ammonium acetate solution to volume 100mL, as solution A, and then were drawn 10.0mL,
5.0mL, 2.0mL, 1.0mL of the solution A, with ammonium acetate solution to volume 100mL. Solution as a series of standards.
5.9.6 Test Method
5.7.3 Under the test conditions specified, Pipette test solution and standard solution is injected with a syringe and filled with micro-quantitative ring
Chromatography, pending completion of the last component of the outflow, measured peak area standard solution substance drawn into a standard curve. Test solution
Peak area of the substance, according to the standard curve determined amount of this substance.
Determination of sodium 2-naphthoic 5.10 Content
5.10.1 Reagent
With this standard 5.7.1.
5.10.2 Equipment
With this standard 5.7.2.
5.10.3 chromatographic conditions
In addition to the detection wavelength was 290nm, the other conditions with this standard 5.7.3.
5.10.4 formulated test solution
With this standard 5.7.4.
Preparation of standard solutions 5.10.5
It was weighed into 6-hydroxy-naphthalene sulfonate vacuum desiccator after about 24h 0.01g, accurate to 0.0002g. With ammonium acetate
Solution to dissolve and dilute to 100mL. Draw the solution 10mL, ammonium acetate solution to volume 100mL, this liquid as a solution A. However
After Pipette 3.0mL, 2.0mL, 1.0mL of the solution A, with ammonium acetate solution to volume 100mL, as a series of standard solution.
5.10.6 analysis step
5.10.3 In the specified test conditions, respectively, to draw the test solution and standard solution is injected with a syringe and filled with micro-quantitative ring
Chromatography, until complete outflow of the last component, was measured for each standard solution of sodium 2-naphthoic peak area of the standard curve plotted
line. Test solutions of sodium 6-hydroxy-naphthalene peak area, the amount of this substance is determined according to the standard curve.
5.11 Determination of 5-methoxy-4-amino-2-methyl-benzenesulfonic acid content
5.11.1 Reagent
With this standard 5.7.1.
5.11.2 Equipment
With this standard 5.7.2.
5.11.3 chromatographic conditions
With this standard 5.10.3.
5.11.4 formulated test solution
With this standard 5.7.4.
Preparation of standard solutions 5.11.5
4-amino-weighed into a vacuum desiccator after 24h methoxy-2-methyl-benzenesulfonic about 0.01g, with accuracy of 0.0002g.
Dissolved ammonium acetate solution and dilute to 100mL. Draw the solution 10mL, ammonium acetate solution to volume 100mL as a solution A.
Then Pipette 10.0mL, 5.0mL, 2.0mL, 1.0mL solution A, with ammonium acetate solution to volume 100mL, as a series of standard
Standard solution.
5.11.6 analysis step
5.10.3 In the specified test conditions, respectively, to draw the test solution and standard solution is injected with a syringe and filled with micro-quantitative ring
Chromatography, until complete outflow of the last component, was measured for each standard solution of 4-amino-5-methoxy-2-methyl-benzenesulfonic acid peak area, made
standard curve line. Test solution of 4-amino-5-methoxy-2-methyl-benzenesulfonic acid peak area, determined according to the standard curve the amount of this substance.
Determination of bis (2-naphthalene sulfonic acid) disodium salt content - 6,6'-oxo 5.12
5.12.1 Reagent
With this standard 5.7.1.
5.12.2 Instruments
With this standard 5.7.2.
5.12.3...
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