This work describes rapid, sensitive and highly precise methods for the determination of total iron in blood serum and water samples, using batch, nFIA and rFIA techniques. The proposed methods are based on the selective oxidation of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) by iron(III). The absorbance of the resultant green solution of radical cation (ABTS(·+)) was monitored spectrophotometrically at λ max=415 nm.
View Article and Find Full Text PDFA new kinetic spectrophotometric method for the determination of oxalate has been described, based on its enhancing effect on the oxidation of Mn(II) to MnO(4)(-), which is measured at 525 nm, by potassium periodate. Under the optimum conditions of 20 mugml(-1) Mn(II) in MnSO(4).H(2)O/0.
View Article and Find Full Text PDFIpratropium (IP(+)) ion-selective electrode (ISE) has been constructed from poly(vinyl chloride) matrix membrane containing Ipratropium-tetraphenylborate (IP-TPB) as the electroactive component using 2-nitrophenyloctylether as plasticizer. The electrode exhibits near Nernstian response to Ipratropium bromide (IPBr) over the concentration range 10(-5) to 10(-2) mol L(-1) and detection limit 5.1x10(-6) mol L(-1).
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