ISO/TS 23758 | IDF/RM 251: 2021 – Guidelines for the validation of qualitative screening methods for the detection of residues of veterinary drugs in milk and milk products
This document describes general workflows and protocols for the validation and the verification of qualitative screening tests for the detection of residues of veterinary drugs in liquid milk (raw, pasteurized, UHT and reconstituted milk powders and whey protein extracts) including biological methods. This guideline does not cover the validation of residue analysis by HPLC, UHPLC […]
Bulletin of the IDF N° 511/2021: Guidance on the application of conversion equations for determination of microbiological quality of raw milk
The microbiological quality of raw milk – the Total Bacteria Count – is routinely recorded by automated milk analyzers based on Flow Cytometry, whereas Standard Plate Count is still the anchor method and quoted by many official regulations. Often the units of the alternative analysers are converted into anchor method units. This Bulletin describes the […]
ISO 14501 | IDF 171: 2021 – Milk and milk powder – Determination of aflatoxin M1 content – Clean-up by immunoaffinity chromatography and determination by high-performance liquid chromatography
This document specifies a method for the determination of aflatoxin M1 content in milk and milk powder. The lowest level of validation is 0,08 µg/kg for whole milk powder, i.e. 0,008 µg/l for reconstituted liquid milk. The limit of detection (LOD) is 0,05 μg/kg for milk powder and 0,005 μg/kg for liquid milk. The limit […]
ISO 21187 | IDF 196: 2021 Milk – Quantitative determination of microbiological quality – Guidance for establishing and verifying a conversion relationship between results of an alternative method and anchor method results
This document gives guidelines for the establishment of a conversion relationship between the results of an alternative method and an anchor method, and its verification for the quantitative determination of the microbiological quality of milk. The conversion relationship can be used a) to convert results from an alternative method to the anchor basis or b) […]
Bulletin of the IDF N° 508/2021: Guidance on application of EC JRC Certified Reference Material for somatic cell counting in milk
This paper provides relevant guidance on how to apply this material for method performance verification of both the microscopic reference method and routine methods, for verification and possibly required adjustment of calibration settings of routine methods, for assigning reference values to secondary reference materials and for use in proficiency testing.
ISO 22184 I IDF 244: 2021 – Milk and milk products – Determination of the sugar contents – High performance anion exchange chromatography with pulsed amperometric detection method (HPAEC-PAD)
This document specifies the quantitative liquid chromatographic determination of specific sugars (galactose, glucose, fructose, sucrose, lactose and maltose) in various milk and milk products, applying arabinose as an internal standard. The method is applicable to the following dairy matrices: milk, sweetened condensed milk, milk powder, cheese, whey powder, infant formula, milk dessert and yoghurt. The […]
ISO 21543 I IDF 201: 2020 – Milk and milk products – Guidelines for the application of near infrared spectrometry
This document gives guidelines for the use of near infrared (NIR) spectrometry in the analysis of milk and milk products in liquid, semi-solid or solid form. Depending on the sample form and application, different instrument setups for transmittance, diffuse reflectance or transflectance can be applied. This edition cancels and replaces the joint standard ISO 21543 […]
ISO 22186 I IDF 245: 2020 Milk and milk products – Determination of nitrofurazone
This document specifies a liquid chromatography tandem mass spectrometry (LC–MS/MS) method for the quantification of the inhibitory substance, nitrofurazone, in milk and milk products. The method has been validated for measuring trace levels of intact nitrofurazone to levels down to 1 ng/g in fluid milk and powdered dairy products on a whole product (i.e. powder) […]
ISO 22579 I IDF 241: 2020 – Infant formula and adult nutritionals – Determination of fructans – High performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) after enzymatic treatment
This document specifies a method for the determination of inulin-type fructans (including oligofructose, fructooligosaccharides) in infant formula and adult nutritionals (both powder and liquid) containing 0,03 g/100 g to 5,0 g/100 g of fructans in the product as prepared ready for consumption. The method has been validated in a multi laboratory study[1] with reconstituted standard […]
Bulletin of the IDF N° 504/2020: New applications of MIR spectrometry: Quality assurance practices with new parameters in raw milk analysis
Traditionally applied for quantitative determination of major components of milk, MIR Filter apparatus techniques have been used for a long time. Recently, Fourier-transform infrared spectroscopy (FTIR) collects high-spectral-resolution data over a wide spectral range. Thanks to additional prediction models developed by researchers and instrument manufacturers, FT-IR spectra can be used beyond quantitative determination of major […]
