ISO 16632:2021 PDF

Tobacco and tobacco products — Determination of water content — Gas-chromatographic method

Title (English):

ISO 16632:2021

Tobacco and tobacco products — Determination of water content — Gas-chromatographic method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 10
Publication date:: August 4, 2021
Edition:: ISO IS 16632 edition 3 version 1
ICS:: 65.160

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Description (English):

This document specifies a gas-chromatographic (GC) method for the determination of water content. It is applicable to raw tobacco as well as tobacco taken from finished products. The method is suitable for water contents ranging at least from a mass fraction of 2 % to 55 %.

Technical details

Technical committee: ISO/TC 126 - Tobacco and tobacco products
SKU: ISO 16632:2021

Abstract

Overview

ISO 16632:2021 specifies a gas‑chromatographic (GC) method for the determination of water content in tobacco and tobacco products. Applicable to raw tobacco and tobacco taken from finished products (including cigars and smokeless reference products), the method reliably measures water mass fractions from about 2 % to 55 %. The procedure uses methanolic extraction with isopropanol as an internal standard and analysis by capillary GC with a thermal conductivity detector (TCD).

Key topics and technical requirements

Principle: Methanolic extraction of water from a defined sample portion, followed by GC‑TCD analysis with an internal standard (isopropanol).
Scope and range: Suitable for a wide variety of tobaccos and finished products; validated for ~2–55 % water content.
Reagents:
- Methanol (max. 1.0 mg/ml water) - hygroscopic and toxic (safety MSDS required).
- Isopropanol (≥99 %) as internal standard (typical addition ~2.0 ml/L).
- Water conforming to ISO 3696 (grade 2 or better).
Apparatus:
- GC with thermal conductivity detector, autosampler and data system.
- Example column: PLOT fused silica with PoraPLOT U phase (25 m × 0.53 mm).
- Standard lab glassware, shaker and filtration (0.45 µm) supplies.
Sample preparation:
- Typical test portion: (5.0 ± 0.25) g sample with 100.0 ml extraction solution.
- Shake 3 h, set aside overnight, filter supernatant (0.45 µm) and refrigerate (

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Principle: Methanolic extraction of water from a defined sample portion, followed by GC‑TCD analysis with an internal standard (isopropanol).
Scope and range: Suitable for a wide variety of tobaccos and finished products; validated for ~2–55 % water content.
Reagents:
- Methanol (max. 1.0 mg/ml water) - hygroscopic and toxic (safety MSDS required).
- Isopropanol (≥99 %) as internal standard (typical addition ~2.0 ml/L).
- Water conforming to ISO 3696 (grade 2 or better).
Apparatus:
- GC with thermal conductivity detector, autosampler and data system.
- Example column: PLOT fused silica with PoraPLOT U phase (25 m × 0.53 mm).
- Standard lab glassware, shaker and filtration (0.45 µm) supplies.
Sample preparation:
- Typical test portion: (5.0 ± 0.25) g sample with 100.0 ml extraction solution.
- Shake 3 h, set aside overnight, filter supernatant (0.45 µm) and refrigerate (

ISO 16632:2021 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

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