Entrapment of reagents in polymeric materials. Indirect atomic absorption spectrometric determination of isoniazid by oxidation with manganese dioxide incorporated in polyester resin beads in a flow-injection system

1992 ◽  
Vol 265 (1) ◽  
pp. 81-86 ◽  
Author(s):  
L. Lahuerta Zamora ◽  
J.V. Garcia Mateo ◽  
J. Martinez Calatayud
Keyword(s):  
Atomic Absorption ◽  
Manganese Dioxide ◽  
Flow Injection ◽  
Polyester Resin ◽  
Polymeric Materials ◽  
Injection System ◽  
Resin Beads ◽  
Flow Injection System ◽  
Atomic Absorption Spectrometric

Direct determination of therapeutic concentrations of lithium in serum by flow-injection analysis with atomic absorption spectroscopic detection.

1982 ◽  
Vol 28 (3) ◽  
pp. 440-443 ◽  
Author(s):  
B F Rocks ◽  
R A Sherwood ◽  
C Riley
Keyword(s):  
Atomic Absorption ◽  
Flow Injection ◽  
Direct Determination ◽  
Injection System ◽  
Analytical Recovery ◽  
Flow Injection System ◽  
Dilution Effects ◽  
Sodium And Potassium ◽  
Sample Dilution

Abstract In this flow-injection system for direct determination of lithium in serum by atomic absorption spectroscopy, the 10-microL sample is manually injected into a continuously flowing non-segmented stream of de-ionized water, which is pumped, via a dispersion tube, to the spectrometer's nebulizer. Controlled dispersion of the sample zone, before it is introduced into the nebulizer, produces the required sample dilution. Effects of varying the length of the dispersion tube, the flow rate, and the sample size were studied. Analytical readout is obtained, in the form of transient peaks, 5 s after sample injection. It is necessary to include physiological concentrations of sodium and potassium in the standard because each of these cations enhances the lithium absorbance signal. Analytical recovery (98.5 to 101%) and CV (about 2%) are good, and results compare well with those obtained by aspiration of prediluted samples (n = 121, r = 0.99).

Sign in / Sign up

Export Citation Format

Share Document