A highly sensitive spectrophotometric determination of micro amounts of vanadium(V) in environmental and alloy samples by using 3,4-dihydroxybenzaldehydeisonicotinoylhydrazone (3,4-DHBINH)

Abstract

3, 4-Dihydroxybenzaldehydeisonicotinoylhydrazone was prepared, characterized with spectral analyses and used for developing a new method for the simple, sensitive and rapid spectrophotometric determination of vanadium(V) which gives maximum absorbance at wave length 360 nm. The metal ion gives a yellow colored complex with 3, 4-DHBINH in acetate buffer of pH 5.5 with 1:1 (metal:ligand) composition. The method obeys Beer's law in the range 0.5-5.3 microg mL(-1) of vanadium(V). The molar absorptivity and Sandell's sensitivity were found to be 1.29 x 10(4) L mol(-1) cm(-1) and 0.003949 microg cm(-2) respectively. The correlation co-efficient of the V(V)-3, 4-DHBINH complex was 0.992 which indicated an excellent linearity between the two variables. The repeatability of the method was checked by finding the relative standard deviation (RSD) as 0.424% (n = 5), and its detection limit 0.01677 microg mL(-1) of vanadium(V). The instability constant of the method was calculated by Asmus' method as 4.1666 x 10(-3). The interfering effect of various cations and anions were also studied. The proposed method was successfully applied to the determination of vanadium(V) in environmental samples (water and soil) tobacco leaves and alloy samples. The validity of the method was tested by comparing the results with those obtained using an atomic absorption spectrophotometer.

A highly sensitive and selective spectrophotometric method for the determination of vanadium at nanotrace levels in some environmental, biological, soil, food, and pharmaceutical samples using salicylaldehyde-benzoylhydrazone

“…A new simple, sensitive, and inexpensive method based on vanadium-Sal-BH complex was developed for the determination of vanadium in some environmental, biological, soil, food, and pharmaceutical samples. Compared with other methods [16][17][18][19][20]41,42] in the literature Table 1, the proposed method has several remarkable analytical characteristics:…”

“…This paper reports its use in a very sensitive, highly specific spectrophotometric method for the trace determination of vanadium. The method possesses distinct advantages over existing methods [16][17][18][19][20] with respect to sensitivity, selectivity, range of determination, simplicity, speed, pH /acidity range, thermal stability, accuracy, precision and ease of operation (Table 1). The literature survey, it reveals that the existing methods are lengthy, time-consuming, pH dependent, and in most of the above-mentioned methods, the interference was high.…”

Development of a high sensitivity photometric procedure for the determination of vanadium in mineral and fresh waters employing a downsized multicommuted flow analysis approach

“…22,23 Spectrophotometry is a detection technique widely employed for vanadium determination and to improve sensitivity, analytical procedures have been implemented employing preconcentration steps including solvent extraction, 5,10 solid phase extraction 7,12 and solid phase spectrophotometry. 16 Analytical procedures carried out manually are very time consuming and produce large volumes of waste 2,5,[7][8][9]12,17,18 and as a result, additional work is required to dispose the waste appropriately in order to minimize the impairment of the environmental sustainability. Analytical procedures for vanadium determination have also been implemented employing the ow injection analysis (FIA) process, thus allowing throughput improvement.…”

“…7,8,16,17 Vanadium in aqueous media may occur in the oxidation states from (II) to (V), but the forms V(IV) and V(V) are the most stable. The form V(V) is considered more toxic than V(IV), 2,10,12,18 thereby vanadium has both benecial and toxic characteristics, while a close relationship is maintained between the essential concentration and levels of toxicity. In this sense, development of analytical procedures for its determination has attracted much interest.…”

“…In this sense, development of analytical procedures for its determination has attracted much interest. Procedures for vanadium determination have been implemented in several types of samples, employing detection techniques such as uorimetry, 14 spectrophotometry, 2,7,10,12,[17][18][19] atomic absorption spectrometry with electrothermal atomization, 20,21 and optical emission spectrometry with inductively coupled plasma. 22,23 Spectrophotometry is a detection technique widely employed for vanadium determination and to improve sensitivity, analytical procedures have been implemented employing preconcentration steps including solvent extraction, 5,10 solid phase extraction 7,12 and solid phase spectrophotometry.…”