Overview
ISO 10349-8:2002 - part of the ISO 10349 series - specifies a general test method for the determination of volatile matter in photographic‑grade chemicals. The standard provides a repeatable gravimetric procedure (oven drying and weighing) to quantify mass loss due to volatile components. It is intended for use with photographic chemicals where control of volatile matter affects product stability, performance and safety.
Key topics and requirements
- Scope and normative references
- Relies on ISO 10349-1 for general provisions on reagents, glassware, hazards and sampling.
- Apparatus (examples specified)
- Low‑form, glass‑stoppered weighing bottle (50 ml capacity).
- Oven capable of maintaining temperatures in the range 70 °C to 150 °C.
- Analytical balance with high precision (example accuracy indicated in the standard).
- Desiccator with suitable desiccant for cooling samples to room temperature before weighing.
- Procedure (general)
- Weigh a specified test portion into a dried weighing bottle.
- Dry the sample in the oven at the temperature and for the time specified for the particular material (see the appropriate International Standard or product method).
- Cool in a desiccator to room temperature and reweigh to the precision required.
- Calculation
- Express volatile matter as a percentage by mass: determine the mass loss on drying (mass before drying minus mass after drying) divided by the initial sample mass (mass before drying minus mass of the empty bottle), multiplied by 100.
- Test reporting
- Report the method used, test result and all operating details not specified in ISO 10349‑8 (e.g., drying temperature/time used), any incidents affecting results, and full sample identification.
Applications and users
- Who uses it
- Quality control and analytical laboratories in photographic and imaging chemical manufacturing.
- Raw material inspectors, R&D chemists developing photographic formulations, and regulatory/compliance personnel overseeing product specifications.
- Why it matters
- Controls volatile impurities that can affect chemical stability, image quality, shelf life and worker/environmental safety.
- Provides a standard, reproducible method for contract testing, supplier qualification and batch release.
Related standards
- ISO 10349-1:2002 (General) and other parts of ISO 10349 covering insoluble matter, heavy metals, halide content, pH, density and related test methods for photographic‑grade chemicals.
Keywords: ISO 10349-8:2002, volatile matter, photographic-grade chemicals, test methods, oven drying, gravimetric determination, quality control.
Open preview (PDF)Photography — Photographic-grade chemicals — Test methods — Part 8: Determination of volatile matter