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GB/T 6684-2002 English PDF (GBT6684-2002)

GB/T 6684-2002 English PDF (GBT6684-2002)

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GB/T 6684-2002: Chemical reagent -- Hydrogen peroxide 30%

This Standard specifies technical requirements, test methods, inspection rules and packaging as well as marks of chemical reagent - hydrogen peroxide 30%.
GB/T 6684-2002
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.040.30
G 62
Chemical reagent -- Hydrogen peroxide 30%
ISSUED ON: MAY 29, 2002
IMPLEMENTED ON: DECEMBER 01, 2002
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Characteristics ... 6
4 Specification (see Table 1) ... 6
5 Test ... 7
6 Inspection rules ... 11
7 Packaging and marks ... 11
_______________________________________________________________________ Molecular formula: H2O2
Relative molecular mass: 34.01 (based on 1997 international relative atomic mass)
1 Scope
This Standard specifies technical requirements, test methods, inspection rules and packaging as well as marks of chemical reagent - hydrogen peroxide 30%. 2 Normative references
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards.
GB/T 601-1988, Chemical reagent - Preparations of standard volumetric
solutions
GB/T 602-1988, Chemical reagent - Preparations of stock standard solutions GB/T 603-1988, Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 609-1988, Chemical reagent - General method for the determination of total nitrogen (idt ISO 6353-1:1982)
GB/T 610.1-1988, Chemical reagent - General method for the determination of arsenic
GB/T 619-1988, Chemical reagent - Regulations for sampling and
acceptance
GB/T 6682-1992, Water for laboratory use; Specifications (eqv ISO
NATIONAL STANDARD OF THE PEOPLE
REPUBLIC OF CHINA GB/T 6684-2002 neq ISO 6353-2:1983
Replacing GB/T 6684-1986
Chemical reagent - Hydrogen peroxide 30%
hydroxide standard titration solution [c(NaOH)=0.01mol/L] to titrate till the solution is green and maintain 30s. The result shall be calculated according to the provisions of Clause 7 ?€?Water-soluble sample?€? in GB/T 9736-1988.
5.4 Chloride
Measure 18mL (20g) of sample [analytical reagent, chemical pure reagent take 9mL (10g)]. Dilute to 20mL. Determine according to GB/T 9729. The turbidity of the solution must not be greater than the standard comparison solution. The preparation of the standard comparison solution takes the following amount of chloride standard solution:
Conduct the same processing with the sample at the same time.
5.5 Sulfate
Measure 9mL (10g) of sample [take 3.6mL (4g) of chemical pure reagent]. Dilute to 20mL. Add 0.5mL of hydrochloric acid solution (mass fraction is 20%) to acidize. Determine according to GB/T 9728. The turbidity of the solution must not be greater than the standard comparison solution.
The preparation of the standard comparison solution takes the following amount of sulfate standard solution:
Conduct the same processing with the sample at the same time.
5.6 Total nitrogen
Measure 4.5mL (5g) of sample [analytical reagent, chemical pure reagent take 1.8mL(2g)]. Place in a platinum dish. After the sample is completely
decomposed, add 10mLof sulfuric acid solution (mass fraction is 5%).
Evaporate on water bath to 5mL. Move this solution to a branch tube distillation flask. Dilute to 140mL and determine according to GB/T 609. The solution shall not be yellower than the standard comparison solution.
The preparation of the standard comparison solution takes the following amount of nitrogen standard solution:
Guaranteed reagent, analytical reagent
Chemical pure reagent
Chemical pure reagent
Guaranteed reagent
Analytical reagent
The solution must not be redder than the standard comparison solution.
The preparation of the standard comparison solution takes the following amount of iron standard solution:
Conduct the same processing with the test solution that is completely
decomposed at the same time.
5.10 Nickel
Measure 90mL (100g) of sample. Slowly inject into a platinum dish. After the sample is completely decomposed, evaporate dry on water bath. Add 0.5mL of hydrochloric acid solution (mass fraction is 20%) to dissolve the residue. Dilute to 25mL. Add 2mL of butadione oxime (nickel reagent) ethanol solution (10g/L), 2mL of sodium hydroxide solution (300g/L) and 1mL of potassium persulfate solution (50g/L). Shake well. The solution must not be redder than the standard comparison solution.
The preparation of standard comparison solution takes the standard solution that contains 0.002mg of nickel (Ni). Add 0.5mL of hydrochloric acid solution (mass fraction is 20%). Dilute to 25mL. Conduct the same processing with the same volume of test solution.
5.11 Copper
Determine according to GB/T 9723.
5.11.1 Instrument conditions
Light source: Copper hollow cathode lamp;
Wavelength: 324.7nm;
Flame: Acetylene-air.
5.11.2 Determination method
Measure 225mL (250g) of sample for guaranteed reagent. Measure 45mL (50g) of sample for analytical reagent. Measure 9mL (10g) of sample for chemical pure reagent. Slowly inject into a platinum dish. After the sample is completely decomposed, evaporate dry on water bath. Add 0.5mL of hydrochloric acid solution (mass fraction is 10%) to dissolve the residue. Dilute to 10mL. Guaranteed reagent
Analytical reagent
Chemical pure reagent

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