Setting upper limits is a different task from setting requirements for their implementation Paul De Bièvre Editorial Pages: 289 - 289
Uncertainty calculations in the certification of reference materials 4. Characterisation and certification Adriaan M. H. van der VeenThomas P. J. LinsingerJean Pauwels General Paper Pages: 290 - 294
The practice of proficiency testing in China G. ZhixiangL. YingZang Muwen Short Contribution Pages: 295 - 296
Use of calibration gases in the U.S. acid rain program J. T. Schakenbach Practitioner’s Report Pages: 297 - 301
Problems of traceability of total protein and catecholamine determinations in human urine Ilona ŠperlingováLudmila DabrowskáJan Kučera Practitioner’s Report Pages: 302 - 305
Traceability in routine chemical measurements: an example of application in the determination of CO2 at atmospheric concentration M. SegaMargherita PlassaElena Amico di Meane Practitioner’s Report Pages: 306 - 309
Evaluation of combined measurement uncertainty of the determination of Mn content in sediment samples József HlavayKlára Polyák Practitioner’s Report Pages: 310 - 316
Experience with wheat flour reference material J. BudaiJudit Fükõ Practitioner’s Report Pages: 317 - 320
Flow-through coulometry as a calibrationless method in inorganic trace analysis E. Beinrohr Discussion Forum Pages: 321 - 324
News from Standardization: Publication of ISO 9000:2000 still in 2000 Richard Schmidt Legislation and Norms Pages: 326 - 326
First international agreement on mutual recognition of accreditation of laboratories signed within ILAC M. Wloka International Bodies Pages: 331 - 332
Standardization news: NEN 7777 – Standardisation of the validation process R. G. Visser Legislation and Norms Pages: A327 - A327
CCQM primary methods symposium: how far does the light shine? R. I. Wielgosz International Bodies Pages: B329 - B331
List of CRM research projects that have initiated under the 5th Framework Programme D. Bennink Research Programmes Pages: A329 - A329
ILAC 2000 – Washington, 28 October – 3 November, 2000 Reflections of the Immediate Past Chair of ILAC Belinda L. Collins Meeting Report Pages: B327 - B328