ISO 8124-5:2015

Overview

ISO 8124-5:2015 - Safety of toys - Part 5: Determination of total concentration of certain elements in toys - defines standardized sampling, preparation and digestion procedures used before instrumental analysis of total concentrations of eight priority elements in toy materials. The standard covers antimony, arsenic, barium, cadmium, chromium, lead, mercury and selenium and is intended to help manufacturers, testing laboratories and regulators assess total element content in toys and toy parts.

Key topics and technical requirements

• Scope of materials: digestion methods are specified for coatings (paints, varnishes, inks), polymeric materials and laminates, paper/paperboard, natural and synthetic textiles, metallic materials, wood/leather and similar materials, materials intended to leave a trace (e.g., pencil graphite, pen ink), pliable modelling materials (clays, gels), paints/finger paints and packaging that forms part of a toy. Glass, ceramic, siliceous materials and fluorinated polymers/coatings are excluded.
• Elements covered: antimony (Sb), arsenic (As), barium (Ba), cadmium (Cd), chromium (Cr), lead (Pb), mercury (Hg), selenium (Se).
• Sampling and test portions: guidance on selection, compositing and preparation of test portions (including prohibition of compositing dissimilar material types).
• Digestion techniques: hot plate, hot block or microwave digestion systems are specified to achieve complete digestion and solubilisation of target elements. Recommended vessel capability (e.g., withstand ≥225 °C and ~3 000 kPa) and use of trace‑metal grade reagents are described.
• Instrumental analysis: methods assume quantification by techniques such as ICP‑MS or ICP‑AES; the standard addresses sample dilution, blanks and instrument detection limits.
• Quality controls: requirements for reagent purity, sample blanks and appropriate analytical-grade reagents (ISO 3696 water referenced).

Practical applications and who uses it

• Toy manufacturers use ISO 8124-5:2015 for incoming raw‑material checks and in‑process verification to reduce risk of non‑compliance with element limits.
• Independent testing laboratories implement the digestion and sample‑prep methods specified by the standard before elemental analysis by ICP techniques.
• Regulators and compliance teams use results to screen whether migration testing (e.g., ISO 8124-3) is required or to support conformity assessments where total element limits apply.
• Suppliers of polymeric coatings, paints and modelling materials apply the methods to validate material safety for children’s products.

Related standards

• ISO 8124-3 (Migration of certain elements) - used together to determine soluble/migratable fractions.
• ISO 8124 series (other parts relevant to toy safety).
• EN 71‑3 and ASTM F963 - comparable national/regionals standards for element limits.
• ISO 3696 - laboratory water quality used as a reagent specification.

Keywords: ISO 8124-5:2015, safety of toys, total concentration, toy testing, microwave digestion, ICP‑MS, ICP‑AES, lead, cadmium, mercury, antimony, arsenic, barium, chromium, selenium.