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prEN ISO 10399 Viešoji apklausa

Komentavimo iki data 2025-09-09

Juslinė analizė. Metodika. Testas du iš trijų (ISO/DIS 10399:2025)

ISO 10399 specifies a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes. The method is statistically less efficient than the triangle test (described in ISO 4120) but is easier to perform by the assessors. The method is applicable even when the nature of the difference is unknown (i.e. it determines neither the size nor the direction of difference between samples, nor is there any indication of the attribute(s) responsible for the difference). The method is applicable only if the products are fairly homogeneous. The method is effective for a) determining that either a perceptible difference results (duo-trio testing for difference), or a perceptible difference does not result (duo-trio testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage, and b) for selecting, training and monitoring assessors. Two forms of the method are described: - the constant-reference technique, used when one product is familiar to the assessors (e.g. a sample from regular production); - the balanced-reference technique, used when one product is not more familiar than the other.

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ISO/DIS 10399 Viešoji apklausa

Komentavimo iki data 2025-09-07

Juslinė analizė. Metodika. Testas du iš trijų

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prEN ISO 11133 Viešoji apklausa

Komentavimo iki data 2025-09-02

Maisto grandinės, pašarų ir vandens mikrobiologija. Mitybos terpių ir reagentų paruošimas, gamyba, laikymas ir veiksmingumo tyrimas (ISO/DIS 11133:2025)

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prEN ISO 10565 Viešoji apklausa

Komentavimo iki data 2025-08-15

Aliejingosios sėklos. Aliejaus ir vandens kiekių vienalaikis nustatymas. Impulsinio magnetinio branduolių rezonanso spektrometrijos metodas (ISO/DIS 10565:2025)

This International Standard specifies a rapid method for the determination of the oil and water contents of commercial oilseeds using pulsed nuclear magnetic resonance (NMR). It is applicable to rapeseeds, soya beans, linseeds and sunflower seeds with a water content less than 10 %. For seeds with higher water contents, drying is necessary before the oil content can be determined by pulsed NMR. NOTE 1 This method has been tested with rapeseeds, soya beans, linseeds and sunflower seeds. This does not, however, preclude its applicability to other commercial seeds whose oil is liquid at the temperature of measurement. NOTE 2 The reproducibility values are generally higher than those obtained by the drying method (ISO 665)

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