000	02879cam  2200421zi 4500
001	9.877163
003	CaOODSP
005	20221107164912
006	m     o  d f
007	cr bn|||||||||
008	190730s1994    onca    ob   f000 0 eng d
040	|aCaOODSP|beng|erda|cCaOODSP
043	|an-cn-on
086	1 |aEn13-5/94-39E-PDF
100	1 |aCheam, V., |eauthor.
245	10|aDirect determination of dissolved and total thallium in lake waters by laser-excited atomic fluorescence spectrometry / |cby V. Cheam, J. Lechner, R. Desrosiers and I. Sekerka.
264	1|aBurlington, Ontario, Canada : |bNational Water Research Institute, Aquatic Ecosystem Restoration Branch, |c[1994]
300	|a1 online resource (2 unnumbered pages, 13 pages, 5 unnumbered pages) : |billustrations.
336	|atext|btxt|2rdacontent
337	|acomputer|bc|2rdamedia
338	|aonline resource|bcr|2rdacarrier
490	1 |a[NWRI contribution] ; |v94-39
500	|aDigitized edition from print [produced by Environment and Climate Change Canada].
504	|aIncludes bibliographical references (pages 9-10).
520	3 |a"Thallium is a highly toxic, under-studied priority element. However, it has recently created much interest due to fresh and rapid improvements in detection limit. It appears that there are no published Tl data for Great Lakes waters, likely due to the poor sensitivity of classical methods. An electrothermal Laser-Excited Atomic Fluorescence Spectrometer has been optimized to detect sub-femtogram of thallium and used to develop a method for direct determination of dissolved and total thallium in lake waters. The method voids the labor-intensive, contamination-prone tasks of filtration, centrifugation and acid digestion of collected particulates. Adequate precision and recoveries were achieved using several lake waters (undigested and digested) and a certified reference material. The concentration of thallium in the acidified (0.2% HNO₃) Milli-Q-Water was monitored over a period of four months and averaged 0.02 ± 0.01 ng/l. The concentration in Hamilton Harbor ranged from 3 to 48 ng/l. The mean of dissolved / total fraction of Tl in the Harbor water was 80%"--Abstract.
692	07|2gccst|aLakes
692	07|2gccst|aWater
692	07|2gccst|aPollutants
692	07|2gccst|aChemistry
700	1 |aLechner, Josef F., |eauthor.
700	1 |aDesrosiers, R. J., |eauthor.
700	1 |aSekerka, I., |eauthor.
710	1 |aCanada. |bEnvironment Canada.
710	2 |aNational Water Research Institute (Canada). |bAquatic Ecosystem Restoration Branch.
710	1 |aCanada. |bWater Science and Technology Directorate.
830	#0|aNWRI contribution ;|v94-39.|w(CaOODSP)9.844121
856	40|qPDF|s1.78 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-94-39-eng.pdf