in this study, a rapid and simple method based on graphite furnace atomic absorption spectrometry (gfaas) is described for direct determination of arsenic in potassium citrate tablet samples. pyrolytic graphite tubes were used as atomizers. nickel nitrate was used as chemical modifier. the ashing and atomization temperature and the concentration of modifier were also optimized. the detection li...

A method for determining platinum in biological materials by flameless atomic absorption spectrometry has been developed for use in pharmacological studies of platinum antitumor compounds. Tissue digests are analyzed in a heated graphite atomizer, with use of background correction and ramp temperature charring. We have overcome problems of apparent loss of platinum in Pt-supplemented tissue sam...

cobalt is widely used in different industrial processes for production of various synthetic materials. for assessment of human exposure to toxic metal of co (ii), environmental and biological monitoring are essential processes, in which, preparation of samples is one of the most time-consuming and error-prone aspects prior to instrumental analysis. the aim of this study was to achieve optimum f...

objective: in developing countries, nutritional deficiency of essential trace elements is a common health problem, particularly among pregnant women because of increased requirements of various nutrients. accordingly, this study was initiated to compare trace elements status in women with or without pre-eclampsia. materials and methods: in this study, serum trace elements including zinc (zn), s...

Analytical chemistry of metal complexes with biomacromolecules based on the coupling of a high resolution separation technique with an element or species selective detection technique is critically discussed. The role of size-exclusion chromatography (SEC) with on-line atomic spectrometric detection is evaluated for the characterization of the metal distribution among the fractions of different...

PURPOSE To present the findings from histological and chemical analysis of large dacryoliths and correlate them with previous reports. MATERIALS AND METHODS Dacryoliths were found in 8% of 216 dacryocystorhinostomy operations. In two cases with mild chronic dacryocystitis, large dacryoliths were extracted. The first case was a 42-year-old male with three dacryoliths in a lacrimal sac, present...

A microsampling cup procedure is described for rapid, precise determination of copper in plasma. Conventional Delves-cup atomic absorption spectrometry does not yield usable copper signals with blood plasma samples. Analytical sensitivity was improved 11-fold by use of cups fitted with an axial hole, a triangular cup-holding loop, and a smaller-bore absorption tube. The modified procedure yield...

This review covers advances in the analysis of air, water, plants, soils and geological materials by a range atomic spectrometric techniques including emission, absorption, fluorescence mass spectrometry.

Atomic absorption spectrometry facilitates the reliable determination of mineral content during pharmaceutical quality control medicinal plants. In present work, measurable amounts Fe, Ca, Cu, K, Mg, Mn, Na and Zn were detected in leaves flowers Hypericum origanifolium Willd. through atomic spectrometry. Mean heavy metal H. was, descending order, Ca > Mg K Fe. was higher concentrations (11157.2...