Position Papers

relana® Position Papers

The reliability and validity of analytical results are of highest importance for all stakeholders of the food chain. Therefore, analytical laboratories have to meet highest levels of appropriate accuracy and care.

On the other hand, laboratories have to face analytical challenges depending on the applied methods and procedures, and the individual, local realities and conditions (equipment, integration into established process chains, constraints associated with existing space at the laboratory etc.). This has a huge impacte on laboratories' routines.

This is a "Herculean task". And this is the reason why a standardised method might vary in detail from laboratory to laboratory.

The outcome is an analytical compromise varying from laboratory to laboratory.

relana® Position Papers take firm positions related to the necessary analytical compromises.

Position Paper No. 19-01: Sources of contamination of samples for analysis

This Position paper is about substances (pesticides, contaminants, biocides a.o.) showing positive results in laboratory samples altough these substances were not applied deliberately.

relana pos. paper 19-01 Sources of Contaminations

Position Paper No. 18-01: Sample Preparation Project – Part 1

This position paper refers to the preparation and homogenisation of food samples (fruits and vegetables) for residue analyses taking – demonstrated by 5 selected products.

PP_18-01_SPP-Part1_vers20180820

Position Paper No. 17-01: Phthalimid part 2 – Unavoidable Artefact!

This position paper refers to the formation of phthalimid (PI) out of phthalic anhydride (PSA) during  gaschromatografic analysis, and corresponding impacts on the interpretation of results.

PP_17-01_PI_Part2_vers20170407

Position Paper No 16-05: Quantification of Acidic Herbicides

This Position Paper is related to to the quantification of Phenoxycarboxylic acids (“Acidic Herbicides”), which require an additional hydrolysis step in certain cases.

PP_16-05_acidic-herbicides_vers20160808

Position Paper No 16-04: Analysis of Ethephon in processed food products

This position paper is related to the reliable analysis of Ethephon in processed (dried) food products.

PP_16-04_Ethephon_vers20160801

Position Paper No 16-03: Phthalimid part 1 – About the problem of the new residue definition of Folpet

This position paper is related to the new residue definition of Folpet (reg. (EC) no 396/2005), which now includes the metabolite Phthalimid (PI).

PP_16-03_Folpet-PI_vers20160722

Position Paper No 16-02: Challenging Pesticides (Multi-Residue-Analysis)

This position paper is related to pesticides which are possibly challenging for “Multi-Residue-Method”-analyses.

PP_16-02_Challenging_pesticides_in_MRM_vers20160120

Position Paper No 16-01: Analysis and reporting of Guazatine

This position paper is related to the residue analysis and the corresponding reporting of levels of the fungicide Guazatine on citrus fruits and other crops.

PP_16-01_Guazatine_vers20160721 (update)