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GB/T 602-2002 PDF English

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GB/T 602-2002: Chemical reagent -- Preparations of standard solutions for impurity
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GB/T 602: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 602-2002English95 Add to Cart 0-9 seconds. Auto-delivery Chemical reagent -- Preparations of standard solutions for impurity Valid
GB/T 602-1988English479 Add to Cart 4 days Chemical reagent--Preparations of stock standard solutions Obsolete

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GB/T 602-2002: Chemical reagent -- Preparations of standard solutions for impurity

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT602-2002
Chemical Reagent -- Preparations of Standard Solutions for Impurity ICS 71.040.40 National Standard of the People’s Republic of China Replace GB/T 602-1988 (ISO 6353-1:1982, Reagents for Chemical Analysis - Part 1: General Test Methods, NEQ) Issue Date: October 15,2002 Implementation Date: April 1, 2003 Issued by General Administration of quality Supervision, Inspection and Quarantine of the People’s Republic of China Chemical Reagent - Preparations of Standard Solutions for Impurity 1 Aspect(s) Covered This standard regulates method for preparation of standard solutions for impurity of chemical reagent. This standard is applicable to prepare solution that contains substances (element, ion or molecular) of accurate quantity in unit volume and to measure impurity in chemical reagent. It can also be referred to by other industries.

2 Normative references

The following documents contain contents which, through reference in this text, composite provisions of this standard. For dated reference, subsequent amendments (excepting corrigenda content) to, or revisions of, any of these publications do not apply. Parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies. GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric Solutions GB/T 603-2002 Chemical Reagent - Preparations of Reagent Solutions for Use in Test Methods GB/T 685-1993 Chemical Reagent - Formaldehyde Solution (neq ISO 6353-3:1987) GB/T 6682-1992 Water for Analytical Laboratory Use - Specification and Test Methods (neq ISO 3696:1987) GB/T 6684-2002 Chemical Reagents - 30% Hydrogen Peroxide

3 General Provisions

3.1 Unless other stated herein, purity of reagent used in this standard shall be higher than analytical purity, standard volumetric solution and preparations shall be made according to GB/T 601-2002 and GB/T 603-2002, and water for test use shall be compliant to class-III water specification of GB/T 6682-1992. 3- 2 Measurement of standard solution used for measurement of impurity 3.2.1 Standard solution used for measurement of impurity shall be taken with graduated pipette. Volume of graduated pipette shall not exceed three times volume of standard solution used for measurement of impurity. 3.2- 2 Volume of standard solution used for measurement of impurity taken each time shall be 0.05mL--2.00mL. If volume that is adopted is less than 0.05mL, standard solution used for measurement of impurity shall be diluted in relevant proportion, and volume of diluted solution that is adopted shall not be less than 0.05mL during operation; if volume that is adopted is greater than 2.00mL quantity of reagent and preparation shall be increased in relevant proportion on basis of preparation method of standard solution used for measurement of impurity, and volume of the solution shall not be greater than 2.00mL during operation. 3.3 Unless otherwise stated, in room temperature (15°C -- 25°C), guarantee period of standard solution used for measurement of impurity shall be two months in general; if the standard solution has turbidity and deposit or its color is changed, new standard solution shall be prepared. 3.4 Symbol % used herein to express solution refers to fraction in ethanol (95%). fraction, only refers to volumemass ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.

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