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BS EN ISO 11816-2:2024

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Milk and milk products. Determination of alkaline phosphatase activity – Fluorimetric method for cheese

Published By Publication Date Number of Pages
BSI 2024 26
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This document specifies a fluorimetric method for the determination of alkaline phosphatase (ALP) (EC 3.1.3.1) activity in cheese. This method is applicable to soft cheeses, semi-hard and hard cheeses provided that the mould is only on the surface of the cheese and not also in the inner part (e.g. blue veined cheeses). For large hard cheeses, specific conditions of sampling apply (see Clause 7). The instrument used for the determination of ALP can read activities in the supernatant up to 7 000 milliunits per litre (mU/kg).

PDF Catalog

PDF Pages PDF Title
2 undefined
13 9.1 Verification of instrument performance
9.1.1 General
9.1.2 Daily instrument tests
9.1.3 Using FLM200
9.1.4 Using FLM300
14 9.1.5 Controls
9.2 Reagent controls to test the suitability of ready-to-use working substrate (5.3)
9.3 Calibration
9.3.1 General
15 9.3.2 Using FLM200
9.3.3 Using FLM300
9.4 Determination
16 9.5 Test-sample-related controls
9.5.1 Recommended negative and positive control tests
17 9.5.2 Interfering substance test
9.5.3 Heat-stable microbial ALP control test
10.1 Calibration ratio
18 10.2 Calculation
10.2.1 Supernatant
10.2.2 Cheese
10.3 Expression of test results
19 11.1 Interlaboratory study
11.2 Repeatability
11.3 Reproducibility
Status

Definitive

Pages

26

Publication Date

2024-01-24

ISBN

978 0 539 24517 2

Standard Number

BS EN ISO 11816-2:2024, IDF 155-2

Title

Milk and milk products. Determination of alkaline phosphatase activity – Fluorimetric method for cheese

Identical National Standard Of

EN ISO 11816-2, ISO 11816-2

Replaces

BS EN ISO 11816-2:2016

Descriptors

Fluorimetry, Food products, Pasteurization, Milk, Cheese, Dairy products, Chemical analysis and testing, Pasteurized milk, Phosphatase, Enzymes, Sampling methods, Food testing

Publisher

BSI

Committee

AW/5

ICS Codes 67.100.30 - Cheese
BS EN ISO 11816-2:2024
$142.49