ISO 8174:1986 PDF

Ethylene and propylene for industrial use — Determination of acetone, acetonitrile, propan-2-ol and methanol — Gas chromatographic method

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Title (English):

ISO 8174:1986

Ethylene and propylene for industrial use — Determination of acetone, acetonitrile, propan-2-ol and methanol — Gas chromatographic method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 6
Publication date:: June 19, 1986
Edition:: ISO IS 8174 edition 1 version 1
ICS:: 71.080.10

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Description (English):

The method comprises the passage of a gaseous test portion through water to absorb acetone, acetonitrile, propan-2-ol and methanol, and subsequent gas chromatographic analysis of the aqueous solution, using a flame ionization detector, and comparison of the peaks obtained with those derived from an external standard. The method is applicable to products having acetone, propan-2-ol and methanol concentrations greater than 1 mg/kg, and acetonitrile concentrations greater than 10 mg/kg.

Technical details

Technical committee: ISO/TC 47 - Chemistry
SKU: ISO 8174:1986

Abstract

Overview

ISO 8174:1986 specifies a precise gas chromatographic method for determining the concentrations of acetone, acetonitrile, propan-2-ol (isopropanol), and methanol in industrial-grade ethylene and propylene gases. This international standard, developed by the ISO/TC 47 committee on Chemistry, supports quality control and safety assessments by providing a reliable analytical procedure tailored for detecting these specific impurities present in gaseous samples.

The method involves passing a gas sample through water to absorb the target compounds, followed by gas chromatographic analysis using a flame ionization detector (FID). It is applicable for acetone, propan-2-ol, and methanol at concentrations above 1 mg/kg, and for acetonitrile at concentrations above 10 mg/kg.

Key Topics

Scope and Applicability
- Designed for industrial ethylene and propylene samples
- Detects acetone, acetonitrile, propan-2-ol, methanol impurities
- Suitable for impurity levels above specified threshold concentrations
Analytical Process
- Sampling of gaseous hydrocarbons under controlled conditions
- Absorption of impurities into water via an absorption device with fritted glass plates
- Thermoregulated water bath maintained between 0 and 5 °C during absorption
- Gas chromatographic analysis with flame ionization detection for high sensitivity
Instrumentation Details
- Use of stainless steel chromatography tubes filled with polytetrafluoroethylene-coated Chromosorb T and stationary phases
- Column temperature typically set to 65 °C, injector at 150 °C, detector at 150 °C
- Nitrogen as the carrier gas at a flow rate of 50 mL/min
Calibration and Quantification
- External standards prepared as aqueous solutions with known impurity concentrations
- Peak areas from sample chromatograms compared to calibration peaks for quantification
- Formulae provided for calculating mg/kg concentrations considering temperature, pressure, and sample volume
Quality and Safety Considerations
- Use of analytical grade reagents and distilled water
- Sampling requires adherence to strict safety measures, including explosion hazard precautions and grounding of sample containers
- Reproducibility and repeatability data available to ensure reliable measurement results

Applications

Abstract

Overview

Key Topics

Scope and Applicability
- Designed for industrial ethylene and propylene samples
- Detects acetone, acetonitrile, propan-2-ol, methanol impurities
- Suitable for impurity levels above specified threshold concentrations
Analytical Process
- Sampling of gaseous hydrocarbons under controlled conditions
- Absorption of impurities into water via an absorption device with fritted glass plates
- Thermoregulated water bath maintained between 0 and 5 °C during absorption
- Gas chromatographic analysis with flame ionization detection for high sensitivity
Instrumentation Details
- Use of stainless steel chromatography tubes filled with polytetrafluoroethylene-coated Chromosorb T and stationary phases
- Column temperature typically set to 65 °C, injector at 150 °C, detector at 150 °C
- Nitrogen as the carrier gas at a flow rate of 50 mL/min
Calibration and Quantification
- External standards prepared as aqueous solutions with known impurity concentrations
- Peak areas from sample chromatograms compared to calibration peaks for quantification
- Formulae provided for calculating mg/kg concentrations considering temperature, pressure, and sample volume
Quality and Safety Considerations
- Use of analytical grade reagents and distilled water
- Sampling requires adherence to strict safety measures, including explosion hazard precautions and grounding of sample containers
- Reproducibility and repeatability data available to ensure reliable measurement results

ISO 8174:1986 PDF

Technical details

Abstract

Overview

Key Topics

Applications

Abstract

Overview

Key Topics

Applications

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