Overview
ISO 22863-14:2025 defines a standardized, qualitative test method for the identification of perchlorates in pyrotechnical compositions used in fireworks. The method is intended for testing laboratories and manufacturers to determine the presence of perchlorate ions in samples disassembled according to ISO 22863-1 or ISO 22863-16. The documented procedure uses a two-step chemical approach-removal of interfering anions and a chromogenic indicator reaction-to provide a clear positive/negative identification.
Key Topics
- Scope: Qualitative detection of perchlorates in pyrotechnic compositions of fireworks.
- Principle:
- First step: barium chloride precipitation is used to remove potential interferences (e.g., chromate, dichromate, manganate, permanganate).
- Second step: the filtrate is tested with methylene blue at a controlled pH to produce a characteristic chromogenic reaction (purple spots) indicating perchlorate ions.
- Reagents (examples): Ethanol (AR), barium chloride (AR), methylene blue (AR), 50% ethanol solution, 20% barium chloride solution, 0.2% methylene blue solution.
- Apparatus (examples): Electronic balance (0.01 g), 200 ml beaker, filtration paper (30–50 µm).
- Procedure highlights: Weigh ~0.5 g sample, wet with ethanol solution, dilute with water, optionally add barium chloride solution when coloured, heat to about 70 °C, filter, then place filtrate drops on filter paper and add methylene blue-appearance of purple spots indicates perchlorates.
Applications
This qualitative identification method supports practical uses such as:
- Laboratory screening of pyrotechnic compositions for perchlorate presence prior to further analysis or disposal.
- Quality control in fireworks manufacturing to detect unintended perchlorate contamination.
- Safety and compliance checks to support regulatory reporting and hazardous-material handling decisions.
- Pre‑testing before quantitative analyses or when assessing suspect materials recovered from incidents.
Benefits include a simple, low-cost bench procedure using commonly available reagents and apparatus, enabling rapid identification without requiring advanced instrumentation.
Related Standards
- ISO 22863-1 - Fireworks - Test methods for determination of specific chemical substances - General: provides definitions and general test methods referenced by Part 14.
- ISO 22863-16 - Fireworks - Test methods for determination of specific chemical substances - Procedures for identification of report or burst charge: provides sample disassembly and preparation guidance referenced in this part.
For test reporting, ISO 22863-14:2025 specifies required report elements including laboratory identification, sample description and origin, reference to the standard, results, and any anomalies observed during testing.
Open preview (PDF)Fireworks — Test methods for determination of specific chemical substances — Part 14: Qualitative identification of perchlorates
