ATOMIC ABSORPTION SPECTROMETRY OF ACIDIC PHARMACEURICAL CONSTITUENTS THROUGH PRECIPITATION BY METAL IONS: I. DETERMINATION OF TIAPROFENIC ACID

1995 ◽  
Vol 4 (1) ◽  
pp. 141-149
Author(s):  
Hesham Salem ◽  
Afaf Abou elKheir
Keyword(s):  
Metal Ions ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Tiaprofenic Acid ◽  
Absorption Spectrometry

K, Ca, Mg, and Zn in platelets, as determined by atomic absorption spectrometry with use of a sealed decomposition bomb and discrete nebulization.

1985 ◽  
Vol 31 (4) ◽  
pp. 609-612 ◽  
Author(s):  
T Makino
Keyword(s):  
Metal Ions ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Accurate Determination ◽  
Absorption Spectrometry ◽  
New Method ◽  
Differential Centrifugation ◽  
Individual Variations

Abstract In this new method for precise and accurate determination of K, Ca, Mg, and Zn in platelets, small amounts of platelets, prepared by differential centrifugation and cell washing, are decomposed in a homemade mini-vessel, a sealed Teflon bomb. The metal ions in the decomposed sample are measured by atomic absorption spectrometry with discrete nebulization. Overall, CVs ranged from 0.8 to 4.8%. We investigated sex-related differences (none were found) and intra-individual variations.

Determination of Pb (II), Cu (II), Co (II), Mn (II), and Fe (III) by electrothermal atomization atomic absorption spectrometry after preconcentration with nanofibers

2019 ◽  
Vol 85 (12) ◽  
pp. 14-19
Author(s):  
A. I. Danchuk ◽  
Yu. V. Grunova ◽  
M. K. Gabidulina ◽  
S. Yu. Doronin
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Aqueous Media ◽  
Absorption Spectrometry ◽  
High Energy ◽  
Electrothermal Atomization ◽  
Manganese Ion

The results of sorption preconcentration of some heavy metal (HM) ions with their subsequent determination in natural and drinking water by electrothermal atomization atomic absorption spectrometry (ETAAS) are presented. The sorption and desorption (0.01 – 1 M HNO3) of lead, copper, iron, cobalt and manganese ions from aqueous media on nanofiber samples obtained from polyacrylonitrile (PAN) with subsequent directed modification by 1.25 M NaOH solution upon heating (70°C) (PAN*) are studied and optimized. Nanofibers were obtained by capillary-free electroforming from solutions of PAN in dimethylformamide. This method is advantageous for the simplicity of equipment, high energy efficiency of nanofiber production, versatility and flexibility in controlling process parameters and allows production of nanomaterials with desired properties. The values of the extraction degree (95.8 – 99.5%) and selectivity coefficients for competing pairs of metal ions are calculated: вPb/Cu = 1.2; вPb/Co = 2.8; вPb/Mn = 3.2;вCu/Co = 1.7; вCu/Mn = 3.7; вCo/Mn = 2.5. A comparative analysis of the sorption activity of the obtained nanofibers revealed that the character of lead, copper, cobalt and manganese ion sorption by nanofibers is non-selective at pH 6 – 8 and selective for iron (III) ions at pH  3. A technique of sorption-atomic absorption determination of the aforementioned metal ions in real objects with preliminary nanofiber concentration at the level of tenths and hundredths of MPC is proposed. Non-woven materials based on modified PAN are used as effective extractants of nanogram quantities of HM ions. The detection limits for heavy metal ions are 40 – 80 ng/dm3.

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