Analytical application of inorganic salt standards and mixed-solvent systems to trace-metal determination in petroleum crudes by atomic-absorption spectrophotometry

The Analyst ◽  
1984 ◽  
Vol 109 (2) ◽  
pp. 127 ◽  
Author(s):  
Oladele Osibanjo ◽  
Samuel E. Kakulu ◽  
Sunday O. Ajayi
Keyword(s):  
Trace Metal ◽  
Atomic Absorption ◽  
Inorganic Salt ◽  
Mixed Solvent ◽  
Atomic Absorption Spectrophotometry ◽  
Analytical Application ◽  
Metal Determination ◽  
Absorption Spectrophotometry ◽  
Trace Metal Determination ◽  
Solvent Systems

Spectrophotometric investigation of sensitive complexing agents for the determination of zinc in serum.

1985 ◽  
Vol 31 (8) ◽  
pp. 1310-1313 ◽  
Author(s):  
R Homsher ◽  
B Zak
Keyword(s):  
Trace Metal ◽  
Atomic Absorption ◽  
Serum Zinc ◽  
Atomic Absorption Spectrophotometry ◽  
Molar Absorptivity ◽  
Water Soluble ◽  
The Other ◽  
Complexing Agents ◽  
Absorption Spectrophotometry

Abstract Of two sensitive complexometric reagents for the colorimetry of serum zinc that we investigated, one, 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP), was found to be a potentially useful compound for trace-metal determinations. It has a high molar absorptivity (120 000 L mol-1 cm-1) but is not convenient to use because it is not very soluble in water. The other reagent, a related pyridylazo compound, is 2-(5-bromo-2-pyridylazo)-5-(N-n-propyl-N-3-sulfopropylamino)phenol (5-BR-PAPS). It seems better suited for use in routine zinc determinations because, besides being water soluble, it has a higher molar absorptivity, 130 000 L mol-1 cm-1. Results by the proposed method developed with 5-Br-PAPS correlated well with those by atomic absorption spectrophotometry. The between-run CV for control sera was less than 5%; the within-run CV (same controls) was less than 4%.

scholarly journals Trace metal bioaccumulation in oysters (Crassostrea gigas) from Liaodong Bay (Bohai Sea, China)

2021 ◽  
Author(s):  
Yonghua Liu ◽  
Jiayu Xu ◽  
Yong Wang ◽  
Song Yang
Keyword(s):  
Trace Metal ◽  
Atomic Absorption ◽  
Crassostrea Gigas ◽  
Bohai Sea ◽  
Atomic Absorption Spectrophotometry ◽  
Liaodong Bay ◽  
Metal Bioaccumulation ◽  
Metal Concentrations ◽  
Absorption Spectrophotometry ◽  
Cu And Zn

AbstractCd, Cr, Cu, Pb, and Zn concentrations were measured in oysters (C. gigas), plankton, and seawater during spring, summer, and autumn in Liaodong Bay (Bohai Sea, China) to elucidate the effects of season, region, and oyster size on metal bioaccumulation in oysters. Metal concentrations were quantified via atomic absorption spectrophotometry. Our study determined that metal concentrations in oysters, plankton, and seawater were the highest in summer, whereas the lowest levels occurred in autumn. Regarding oyster sizes, the highest Pb levels occurred in C3-sized oysters (> 5-cm length), whereas the highest Cd, Cr, Cu, and Zn levels occurred in C2 (3–5-cm length) oysters. In contrast, the lowest Cu and Pb levels occurred in C1 (< 3-cm length) oysters, whereas the lowest mean Cd, Cr, and Zn concentrations were observed in C3 oysters. Significant differences in trace metal concentrations in the three sample types were observed in all sampling sites.

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