The determination of the uncertainty of reference materials certified by laboratory intercomparison Jean PauwelsAndrée LambertyHeinz Schimmel GENERAL PAPER Pages: 180 - 184
The optimal amount of isotopic spike solution for ultratrace analysis by isotope dilution mass spectrometry R. HoelzlChristian HoelzlLazlo Fabry SHORT CONTRIBUTION Pages: 185 - 188
Validation requirements for chemical methods in quantitative analysis – horses for courses? R. J. Wells PRACTITIONER'S REPORT Pages: 189 - 193
Validation criteria for developing ion-selective membrane electrodes for analysis of pharmaceuticals Raluca-Ioana StefanH. Y. Aboul-Enein PRACTITIONER'S REPORT Pages: 194 - 196
Basic steps towards a self-sustainable quality system and laboratory accreditation P. BodeK. HeydornR. Zeisler PRACTITIONER'S REPORT Pages: 197 - 202
The Swiss External Quality Assessment Scheme in Bacteriology and Mycology 1992–1996 H. H. SiegristV. Pünter-StreitA. von Graevenitz PRACTITIONER'S REPORT Pages: 203 - 207
European Quality Promotion Policy for improving the competitiveness of european industry A. Julin POLICIES AND CONCEPTS Pages: 208 - 210
Different approaches to legal requirements on validation of test methods for official control of foodstuffs and of veterinary drug residues and element contaminants in the EC H. Hey LEGISLATION AND NORMS Pages: 211 - 214
European Co-operation for Accreditation: EAL and EAC merge into EA Katrina Wenell INTERNATIONAL COMMITTEES Pages: 216 - 216