caa a22 4500 465748759 CHVBK 20180323111827.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322530 doi (NATIONALLICENCE)springer-10.1007/BF00322530 Short and long term stability of the elemental composition of human body fluid reference materials and their use as master lots [Elektronische Daten] [Kari Dahl, Astrid Hald, Poul Jørgensen, Ivar Martinsen, Yngvar Thomassen] Summary: Studies have been made of both short and long term stability of trace elements in lyophilized human body fluid reference materials, as well as the stability of mercury in reconstituted urine solutions. No detectable concentration changes for mercury, lead and aluminium occurred during the 5-year period. There are large differences in the amounts of mercury loss among different reconstituted materials. Addition of traces of gold to the solutions minimized the mercury loss and increased the useable time of the reconstituted material from hours to 8 days. A "certification process” based on direct determinations by reference laboratories and by comparison against master lots of the same material and against similar certified reference materials is presented. Values for calcium, copper and mercury obtained from reference laboratories and using the data transfer principle have been assigned in new batches of urine and serum. Springer-Verlag, 1990 Dahl Kari National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut Hald Astrid National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut Jørgensen Poul Odense Hospital, DK-5000, Odense C, Denmark aut Martinsen Ivar Nordic Analytical Centre Ltd, P. O. Box 47 Grorud, N-0917, Oslo 9, Norway aut Thomassen Yngvar National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 526-529 0937-0633 338:4<526 1990 338 216 https://doi.org/10.1007/BF00322530 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322530 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dahl Kari National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut NATIONALLICENCE 700 1- Hald Astrid National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut NATIONALLICENCE 700 1- Jørgensen Poul Odense Hospital, DK-5000, Odense C, Denmark aut NATIONALLICENCE 700 1- Martinsen Ivar Nordic Analytical Centre Ltd, P. O. Box 47 Grorud, N-0917, Oslo 9, Norway aut NATIONALLICENCE 700 1- Thomassen Yngvar National Institute of Occupational Health, P. O. Box 8149 Dep, N-0033, Oslo 1, Norway aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 526-529 0937-0633 338:4<526 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer