00000000nam 2200000zi 4500
0019.878569
003CaOODSP
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006m     o  d f      
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008190827s1993    onca    ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
0861 |aEn13-5/93-61E-PDF
1001 |aCheam, V., |eauthor.
24510|aDirect determination of lead in seawaters by laser-excited atomic fluorescence spectrometry / |cV. Cheam, J. Lechner, I. Sekerka and R. Desrosiers.
264 1|aBurlington, Ontario : |bEnvironment Canada, National Water Research Institute, Research and Applications Branch, |c[1993]
300 |a1 online resource (4 unnumbered pages, 16 pages, 3 unnumbered pages) : |billustrations.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aNWRI contribution ; |v93-61
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
504 |aIncludes bibliographical references (pages 7-9).
5203 |a"This paper describes a LEAFS method for direct determination of lead in seawaters down to femtogram levels. No separation/concentration steps nor chemical modifier were used. A programmable "in-situ" known addition technique was developed and used as an integral part of the method to reduce sample preparation steps thus possible contamination sources, and compensates for spectral line drift better than standards calibration technique. Four seawater Certified Reference Materials were analysed for Pb concentrations, which were found well within certified ranges. Also spike recoveries of 100±10 % were achieved using a Certified Reference Material and an unknown seawater sample. The practical detection limit was 3 fg Pb absolute (or 1 ng/l relative). To our knowledge, this is the lowest absolute detection limit ever reported for seawater analysis"--Abstract.
546 |aIncludes summaries and abstracts in English and French.
7001 |aDesrosiers, R. J., |eauthor.
7001 |aSekerka, I., |eauthor.
7001 |aLechner, Josef F., |eauthor.
7101 |aCanada. |bEnvironment Canada.
7102 |aNational Water Research Institute (Canada). |bResearch and Applications Branch.
830#0|aNWRI contribution ;|v93-61.|w(CaOODSP)9.844121
85640|qPDF|s1.94 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-93-61-eng.pdf