نتایج جستجو برای: cobalt determination

تعداد نتایج: 280306  

Journal: :Journal of the Metal Finishing Society of Japan 1962

2006
Rajni Sharma Raj Pal Sharma Ritu Bala Miguel Quirós Juan M. Salas

A novel trinuclear cobalt(III) phosphate complex, {[Co(en)2]3(PO4)(HPO4)}2(H2PO4)Cl7 Æ 6H2O, has been synthesized and characterized by single crystal X-ray structure determination and NMR spectroscopy. The compound includes an unprecedented type of discrete cluster with three metal atoms bridged by two phosphate anions. The clusters are associated in chains by strong hydrogen bonds PO4 H PO4. T...

Journal: :Journal of AOAC International 2012

Determination of vitamin B12 in all forms of infant, adult, and/ or pediatric formula (powders, ready-to-feed liquids, and liquid concentrates). For the purpose of this SMPR, vitamin B12 is defined as cobalt-containing corrinoids with the biological activity of cyanocobalamin such as cyanocobalamin (CAS 68-19-9), aquocobalamin (CAS 13422-52-1), hydroxycobalamin (CAS 13422-51-0), methylcobalamin...

Investigation of the redox properties of drugs and their determination are performed by electrochemical techniques. Data obtained from electrochemical techniques are often correlated with molecular structure and pharmacological activity of drugs. In this regard, different modified electrodes were applied as sensors for quantification of different drugs.A nanocomposite of reduced graphene oxide-...

Mohammad Edrisi Mohammad yari Nima Razzaghi Asl Omid Moradi Sajjad sedaghat Sara Shahabipoor

In this work, a new spectrophotometric method for the determination of trace amount of Cobalt (ІІ) ionwas investigated and the stability constant of the related complex was evaluated 2.174 × 104. In the Cobalt(ІІ)-piroxicam complex, the maximum absorbance wavelength is 570 nm and the linearity of calibrationcurve was investigated (5-10 ppm). The relative standard deviation for seven replicate e...

A glassy carbon electrode was modified with graphene oxide nanosheets and a hybrid of copper-cobalt hexacyanoferrate. The nanocomposite was characterized by cyclic voltammetry, FT-IR and scanning electron microscopy. Cyclic voltammetry showed a stable and reversible redox pair with surface confined characteristics in phosphate buffer solution (0.1 M, pH 3). Hydrodynamic amperometry was used for...

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