geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Determination of trace lithium in human urine by electrothermal atomic absorption spectrometry using nitric acid as a chemical modifier to eliminate the interference of chloride


, : Determination of trace lithium in human urine by electrothermal atomic absorption spectrometry using nitric acid as a chemical modifier to eliminate the interference of chloride. Analytical Sciences 25(5): 639-643

Electrothermal atomic absorption spectrometry (ETAAS) is considered the most common and advanced technique to determine trace lithium in biological fluids. However, chloride existing in samples has been reported to create serious interferences. Nitric acid was verified as a chemical modifier to eliminate the interference of chloride in determining trace lithium in urine samples and the possible mechanism was also elucidated. The influence of chloride was completely eliminated by using 0.5% (v/v) HNO(3) as a chemical modifier. Confidence interval analysis on the difference for the slopes of linear regression curves indicated no significant difference between the slopes of aqueous and of urine-matched standard curves with and without 30 mmol/L NaCl in the presence of 0.5% (v/v) HNO(3) (P = 0.146). Thus the direct standardization with an aqueous calibration curve could be used instead of the standard-addition method. We conclude that the developed method is accurate and easily applicable for both routine use and research investigations.

US$29.90

PMID: 19430146


Other references

Neves, M. do P.H. das, 1980: The active forage crop germplasm bank of the Centre for Agricultural Research for the Humid Tropic. Early results of the evaluation of over 200 genotypes distinguished 38 cultivars and ecotypes of grass species as being particularly valuable, especially Panicum maximum 'Makueni', which was resistant to Tilletia sp., and K187B, and also...

Stovner, L.J.; Hagen, K., 2009: Hypertension-associated hypalgesia: a clue to the comorbidity of headache and other pain disorders. Primary headaches and chronic musculoskeletal pain are prevalent disorders with incompletely known causes. To review the data from the HUNT studies on the comorbidity of these pain disorders, and their relation to blood pressure levels. Cross-sect...

Barre, A.D.mme, E.-Van; Peumans, E.; Rouge, P., 1997: Curculin, a sweet-tasting and taste-modifying protein, is a non-functional mannose-binding lectin. A three-dimensional model of curculin, a sweet-tasting and taste-modifying protein from the fruits of Curculigo latifolia, was built from the X-ray coordinates of GNA, a mannose-binding lectin from snowdrop (Galanthus nivalis). The three mannose-b...

Kulicki C.; Mutvei H., 1982: Ultrastructure of the siphonal tube in Quenstedtoceras (Ammonitina). Stockholm Contributions in Geology 37: 129-138

Nossovskii, M.F., 1962: Lamellibranchiata from the Corbula-beds of Oligocene in the Black Sea depression. Paleontologicheskii Zhurnal, (3): 29-39

Byon, H-Jin.; Ok, S-Ho.; Lee, S.Hee.; Kang, S.; Cho, Y.; Han, J.Yeol.; Sohn, J-Tae., 2017: Dexmedetomidine Inhibits Phenylephrine-induced Contractions via Alpha-1 Adrenoceptor Blockade and Nitric Oxide Release in Isolated Rat Aortae. The goal of this <i>in vitro</i> study was to examine the effect of the alpha-2 adrenoceptor agonist dexmedetomidine on phenylephrine (alpha-1 adrenoceptor agonist)-induced contraction in isolated rat aortae and to elucidate the associ...

Persson, L-Göran.; Lingfors, H.; Nilsson, M.; Mölstad, S., 2016: The possibility of lifestyle and biological risk markers to predict morbidity and mortality in a cohort of young men after 26 years follow-up. To study the association between lifestyle and biological risk markers measured at one occasion, morbidity and mortality from cardiovascular disease (CVD) and cancer, and morbidity from diabetes approximately 26 years later. A follow-up study of...

Frey, G.D.; Lavallo, V.; Donnadieu, B.; Schoeller, W.W.; Bertrand, G., 2007: Facile splitting of hydrogen and ammonia by nucleophilic activation at a single carbon center. In possessing a lone pair of electrons and an accessible vacant orbital, singlet carbenes resemble transition metal centers and thus could potentially mimic their chemical behavior. Although singlet di(amino) carbenes are inert toward dihydrogen,...

Marcus, F.; Haley, B.E., 1979: Inhibition of fructose 1 6 bis phosphatase ec 3.1.3.11 by the photo affinity amp analog 8 azido amp. Inhibition studies with the photoreactive AMP analog, 8-azido-AMP, demonstrate that this compound is, like AMP, an allosteric inhibitor of pig kidney and muscle fructose-1,6-bisphosphatases [EC 3.1.3.11]. Photolysis of a mixture of purified pig ki...

Boulard Y.; Landau I., 1971: Description and experimental study of the biological cycle of klossiella mabokensis new species parasitic adeleida of african muridae. Journal of Protozoology 18(SUPPL): 51