Directions on taking food samples

• Chemical Analysis
• Microbiological Testing
• Storage of samples for microbiological analysis

Chemical Analysis

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Please note the following requirements for sampling of foods for chemical analysis:

1. Please refer to the notes section of the current Chemical Food Sampling Programme for information on the types of samples and minimum sample quantities required for each parameter.
2. Food samples submitted for monitoring to ensure compliance with EU food laws should be sampled in compliance with the various EU Sampling Regulations. For example, for heavy metals the regulations recommend that, where possible, a sample size of at least 1 kg is taken.
3. If a number of retail units of a product are required to make up a sample, please ensure that all units are of one batch number. Prior to analysis, all units of the sample are combined and sub-samples are tested. In the event of an unsatisfactory result being obtained, it is not possible to identify the problematic batch where a composite sample of units from different batches has been tested.
4. When attaching adhesive labels to samples ensure that information such as ingredient lists, nutrition labelling, claims etc. is not obscured. If the sample is small in size and this is not practical, the sample may be placed in a clear plastic bag to which the label can be attached.
5. It is a requirement of the laboratory accreditation to "ISO 17025:2005 – General Requirements for the Competence of Testing and Calibration Laboratories", that there is a contract between a customer and the laboratory. The Analysis Request Form is such a contract. For this reason, it is vital that the field "Analysis Required" is completed on the Analysis Request Form and that the required parameter(s) are specified as indicated in the programme. Entries such as "chemical" or "compositional" analysis are not sufficient.
6. In the event that scheduled samples cannot be submitted for testing, please let the specified laboratory contact know as soon as possible so that the laboratory resources can be reallocated to other work.
7. Laboratory contact details are provided in the Programme and also in the ‘Contact Us’ section of this website. Please phone the appropriate named contact with queries regarding test parameters or sampling. When querying a test result, the Executive Analytical Chemist who is named on the test report should be contacted.
8. Delivery of samples to the Laboratory is required within the specified sampling periods. Please ensure that all samples for chemical testing reach the Laboratory before 3p.m. on the day of delivery.

Microbiological testing

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Food Samples for microbiological testing

1. Food samples which would normally be refrigerated should be stored in a refrigerator immediately and submitted to the Laboratory within 24h.
2. Samples which would normally be refrigerated and which cannot be submitted to the Laboratory within 24h should be frozen and submitted as soon as possible thereafter.
3. All samples must be accompanied by a fully completed Laboratory Analysis Request Form.
4. All samples should be minimally handled prior to receipt at the Laboratory. The history of sample handling and storage may affect the microbiological results.
5. A minimum of 150g of food sample is required for microbiological analysis.

Storage of samples for microbiological analysis

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1. Frozen foods should be frozen.
2. Chilled/refrigerated foods should be stored between 0 and 5^oC and not frozen.
3. Dried foods, un-blown cans and foods not generally refrigerated need not be chilled but should be stored and transported at a temperature of less than 20^oC