ISO/TC 264/WG 4 - Test methods

This document specifies the test method for the determination of picrates and picric acid in firework compositions by high performance liquid chromatography.

This document specifies the test method for the determination of phosphorus content in firework compositions by inductively coupled plasma optical emission spectrometry (ICP-AES). Such test is applied to fireworks excluding Christmas crackers, party poppers, or snaps according to ISO 25947-5. The use of white phosphorus can lead to fireworks of hazardous chemical stability that can be detected by possible self-ignition during the thermal conditioning test according to ISO 25947-4:2017, 6.16 (75,0 ± 2,5 °C for 48 h).

This document specifies the method for the determination of the content of lead and lead compounds in pyrotechnic compositions of fireworks by Inductive coupled plasma spectrometry.

This document specifies the method for the determination of the content of lead and lead compounds in pyrotechnic compositions of fireworks by X-ray fluorescence spectrometry (XRF).

This document specifies the test method for the determination of the mercury content in pyrotechnic compositions by hydride generation atomic fluorescence spectrometry.

This document specifies the method for determination of the nitrogen content in nitrocellulose within pyrotechnic compositions of fireworks by iron(II) sulphate titration.

This document specifies the qualitative and quantitative analysis methods for the determination of the chlorates content in pyrotechnic compositions by chemical titration analysis, with the minimum detection limit (Cl O3-1) of 1 000 mg/kg.

This document specifies the test method for the determination of the arsenic content in pyrotechnic compositions by hydride generation -atomic fluorescence spectrometry

This document specifies the qualitative and quantitative analysis methods for the determination of the presence and content of zirconium with a particle size of less than 40 µm in pyrotechnic compositions by specific colour-rendering reactions and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), with a minimum detection limit of 100 mg/kg. The determination of the presence of zirconium with a particle size of less than 40 µm is required for application of ISO 25947-5. Quantitative analysis may bring complementary information if necessary.

This document specifies the test method for determination of the lead content in pyrotechnic compositions of fireworks by flame atomic absorption spectrophotometry, with a minimum detection limit of 10 mg/kg. It is generally recommended to perform a simple preliminary qualitative test to check whether a quantitative analysis is required.

This document specifies the preparation methods of the test samples for the qualitative and quantitative analysis of specific chemical substances in fireworks. The document applies to the following substances to be tested using ISO 22863 (all parts): — hexachlorobenzene; — lead and lead compounds; — arsenic or arsenic compounds; — mercury compounds; — chlorates; — white phosphorus; — picrates or picric acid; — zirconium with a particle size of less than 40 µm; — content of nitrogen in nitrocellulose.

This document specifies the test method for the determination of hexachlorobenzene (HCB) in pyrotechnic compositions by gas chromatography. The limit of detection depends on the substance to be determined, the equipment used, the quality of chemicals used for the extraction of the sample, and the clean-up of the extract. Under the conditions specified in this document, a limit of detection of 1 mg/kg (expressed as dry matter) can be achieved.

ISO 25947-4:2017 specifies test methods. It is applicable to fireworks in categories 1, 2 and 3 according to ISO 25947‑2.

ISO 26261-3:2017 specifies test methods for fireworks of Category 4.