ISO 7304-1:2025

Overview - ISO 7304-1:2025 (pasta cooking quality, sensory analysis)

ISO 7304-1:2025 is the reference method for estimating the cooking quality of alimentary pasta (primarily durum wheat semolina products) by sensory analysis. The standard defines a controlled sensory procedure to evaluate three key attributes after cooking: firmness (by chewing), liveliness (by manual handling) and starch release (by manual handling). It applies to most pasta shapes produced from durum wheat, common wheat, or mixtures thereof, but excludes small soup-type pastas. The method is intended as a benchmark for developing, approving or monitoring instrumental or practical alternatives.

Key topics and technical requirements

• Evaluated attributes: firmness, liveliness, starch release; ratings use a numerical scale (10–100 for firmness).
• Optimum cooking time (OCT): determined by observing the disappearance of the central white line in a crushed or cut strand; overcooking is defined relative to OCT.
• Sample and cooking protocol: typical test uses 100 g pasta in 1 500 ml water (in a 2.5 L pan), with 10.5 g NaCl (≈7 g/L). Specific stirring and draining steps are specified.
• Timing constraints: chewing should occur within 5 minutes after draining; manual handling within 10 minutes.
• Reagents and water quality: target water mineral content ≈300 mg/L (or adjust tap water hardness to ~300 mg/L CaCO3).
• Apparatus: includes specified pans, hotplates, colander, crushing plate or cutter, micrometre/calliper for thickness, barometer (atmospheric pressure affects OCT), and plates with a false bottom to keep reference sample warm.
• Sensory panel: assessors must be selected and trained (references to ISO 4120 and ISO 8586); test design limits series size (maximum six samples per series) and requires a reference/control sample presented throughout testing.
• Environmental conditions: controlled sensory room, D65 lighting, randomized coded samples, and defined progress of tests to ensure repeatability.

Applications and users

Who benefits from ISO 7304-1:2025:

• Pasta manufacturers validating product cooking quality and lot-to-lot consistency
• Quality control laboratories comparing sensory vs. instrumental methods
• R&D teams developing new pasta formulations or processing conditions
• Certification bodies and regulators assessing declared cooking times and consumer quality Practical uses include benchmarking OCT, validating automated texture instruments, training sensory panels, and supporting product claims about al dente quality.

Related standards

• ISO 4120 - Sensory analysis: Triangle test (used for assessor selection)
• ISO 5492 - Sensory analysis: Vocabulary
• ISO 8586 - Sensory analysis: Selection and training of assessors

Keywords: ISO 7304-1:2025, pasta cooking quality, sensory analysis, durum wheat semolina, optimum cooking time, firmness, liveliness, starch release, sensory panel.