ISSN:
1436-5073
Keywords:
molybdenum
;
AAS
;
solvent extraction of Mo
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract A selective and sensitive method for the extraction and microgram determination of molybdenum (VI) with hydroxamic acid as yellow molybdenum-hydroxamate complex from acidic medium is described. The molybdenum-PCPPSAHA complex has λmax 388 nm, molar absorptivity 5.0 × 103l mol−1 cm−1. The system obeys Beer's law in the range of 1–28 μg/ml of molybdenum(VI). Sandell's sensitivity is 0.0192 μg cm2 and stoichiometry of the complex is 1∶2, molybdenum: PCPPSAHA while mixed complex molybdenum-PCPPSAHA-morin has λmax 400 nm and molar absorptivity 5.9 × 103lmo1−1 cm−1 and stoichiometry of the complex is 1∶2∶1. The molybdenum is determined by graphite furnace atomic absorption spectrophotometry after directly pipetted the extract into the furnace which increases the sensitivity 20 fold.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01245786
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