GB/T 34710.1-2017Classification of the mixture gas - Part 1:Toxic classification (English PDF)
混合气体的分类 第1部分：毒性分类
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 1, 2017
Implementation date
May 1, 2018
Scope
GB/T 34710.1-2017 is the English-translated version of 混合气体的分类 第1部分：毒性分类.
GB/T 34710.1-2017 is the Chinese standard "Classification of the mixture gas - Part 1: Toxic classification". Its scope clause reads: This Part of GB/T 34710 specifies the method for toxic classification of mixture gas.
This Part applies to the toxic classification of mixture gas. Its clauses include terms and definitions; abbreviations; toxic classification of mixture gas; calculation method of lc50 of mixture gas; examples of calculation and determination.
It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on NOVEMBER 01, 2017 and took effect on MAY 01, 2018.
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Document preview — GB/T 34710.1-2017
National Standard of the People's Republic of China
- ICS
- 71.040.40
- Classification
- G 86
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Terms and definitions4
- 3 Abbreviations4
- 4 Toxic classification of mixture gas4
- 5 Calculation method of LC50 of mixture gas5
- 6 Examples of calculation and determination5
- Appendix A (Informative) LC 50 values of some gases7
1 Scope
This Part of GB/T 34710 specifies the method for toxic classification of mixture gas.
This Part applies to the toxic classification of mixture gas.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1 Lethal concentration 50
The concentration of the gas in the air which can cause the tested mice to die half in 14 d after being continuously inhaled by healthy male and female adult white mice for 1 h.
2.2 Toxic gases
The gas with a LC 50 value not more than 5000×10
-6 (volume fraction).
3 Abbreviations
The following abbreviations apply to this document.
Lethal concentration 50
4 Toxic classification of mixture gas
The toxic classification of mixture gas shall comply with the provisions of Table
1.
Table 1 -- Toxic classification of mixture gas b) Determination of toxicity: Since the LC 50 value of the mixture gas is
1780000×10
-6 (volume fraction), according to Table 1, the toxicity of this mixture gas is Class 1: non-toxic.
6.3
The LC 50 value of the mixture gas having a sulfur dioxide content of 500×10
-
6 (volume fraction), a nitrogen dioxide content of 500×10
-6 (volume fraction), and nitrogen is calculated; and the toxicity is determined.
a) Calculation steps: The toxic gases in the mixture gas is sulfur dioxide and nitrogen dioxide. According to Appendix A, the LC 50 value of sulfur dioxide is 2520×10
-6 (volume fraction); and the LC50 value of nitrogen dioxide is
115×10
-6 (volume fraction). Calculate according to formula (1) as follows:
b) Determination of toxicity: Since the LC 50 value of the mixture gas is
220000×10
-6 (volume fraction), according to Table 1, the toxicity of this mixture gas is Class 1: non-toxic.
6.4
The LC50 value of the mixture gas having a boron trichloride content of
12×10
-2 (volume fraction), a chlorine gas content of 8×10
-2 (volume fraction), and argon is calculated; and the toxicity is determined.
a) Calculation steps: The toxic gases in the mixture gas is boron trichloride and chlorine gas. According to Appendix A, the LC 50 value of boron trichloride is 2541×10
-6 (volume fraction); and the LC50 value of chlorine gas is 293×10
-6 (volume fraction). Calculate according to formula (1) as follows:
b) Determination of toxicity: Since the LC 50 value of the mixture gas is
312.2×10
-6 (volume fraction), according to Table 1, the toxicity of this mixture gas is Class 2: toxic.
(Volume fraction) (Volume fraction) (Volume fraction)
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 34710.2-2018 — Classification of the mixture gas—Part 2: Corrosive classification
GB/T 34710.3-2018 — Classification of the mixture gas—Part 3: Flammable classification
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