title: Collaborative trials of the sampling of two foodstuffs, wheat and green coffee.
abstract: Two foodstuffs, wheat and green coffee, have been sampled from bulk lots by multiple samplers in the sampling analogue of a collaborative trial. For wheat the variation between samplers, contributing to the standard deviation of sampling reproducibility, was significant for two analytes. No significant sampling reproducibility variation was found in the coffee results, although significant sampling repeatability variation was detected.
authors.affiliation: School of Biological and Chemical Sciences, Birkbeck College, University of London, UK.
authors.forename: Michael
authors.initials: M
authors.lastname: Thompson
authors.forename: Paul
authors.initials: P
authors.lastname: Willetts
authors.forename: Sharron
authors.initials: S
authors.lastname: Anderson
authors.forename: Paul
authors.initials: P
authors.lastname: Brereton
authors.forename: Roger
authors.initials: R
authors.lastname: Wood
mesh_terms: D003069:Coffee / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis*; D007854:Lead / Q000032:analysis; D013058:Mass Spectrometry; D008982:Molybdenum / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000379:methods*; D014908:Triticum / Q000737:chemistry*
chemical_list: D003069:Coffee; D007854:Lead; D008982:Molybdenum; D009584:Nitrogen