caa a22 4500 465748996 CHVBK 20180323111828.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322505 doi (NATIONALLICENCE)springer-10.1007/BF00322505 LaBrecque John Instituto Venezolane de Investigaciones Cientificas-IVIC Apartado 21827, 1020A, Caracas, Venezuela aut Uncertainty limits for certified values of standard reference materials [Elektronische Daten] [John LaBrecque] Summary: Uncertainty limits usually employ the 95% confidence limits and should include allowances for the uncertainty of known sources of systematic errors of the measurements. But in many cases, when an interlaboratory comparison study is used for certification purposes of standard reference materials, only the 95% confidence limits are considered and given as the uncertainty limit. In this work, we shall show the results as the number of mean values (n) reported vary and only the 95% confidence limits are considered, using as an example the intercomparison study on IAEA/SL-3/lake sediment sample. And finally, we shall compare the results if only the 95% confidence limits are considered with those of the standard deviation and propose when n is large that the standard deviation should be employed instead of the 95% confidence limits as the uncertainty limits, if the other systematic and random errors are not included. Springer-Verlag, 1990 Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 411-413 0937-0633 338:4<411 1990 338 216 https://doi.org/10.1007/BF00322505 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322505 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- LaBrecque John Instituto Venezolane de Investigaciones Cientificas-IVIC Apartado 21827, 1020A, Caracas, Venezuela aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 411-413 0937-0633 338:4<411 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer