Analysis of cobalt(II) in 2-(5-cyanotetrazolato)pentaammine cobalt(III) perchlorate
Technical Report
·
OSTI ID:5087261
A new method of analysis is described for cobalt(II) complexes in 2-(5-cyanotetrazolato)pentaammine cobalt(III) perchlorate. The color reagent is 2,2'-dipyridyl-2-pyridyl hydrazone (DPPH), which complexes with the Co(II) and is oxidized to a substitution inert Co(III) (DPPH)/sub 2/ complex. Interferences from other ions is not a problem because the complex is stable at pH 2 - where complexes formed between DPPH and other ions are not stable. The usual air oxidant in this type of analysis has been replaced with ammonium peroxydisulfate improving both the precision and accuracy. The Sandell sensitivity is 0.0015 ..mu..g Co(II)/cm/sup 2/. The system obeys Beer's Law up to 4 ..mu..g in Co(II)mL of solution and has a molar absorptivity of 3.9 x 10/sup 4/ L/mole cm at 514 nm. The procedure was used to determine the degree of decomposition in samples that had undergone partial thermal decomposition. 11 refs., 4 figs., 6 tabs.
- Research Organization:
- Monsanto Research Corp., Miamisburg, OH (USA). Mound
- DOE Contract Number:
- AC04-76DP00053
- OSTI ID:
- 5087261
- Report Number(s):
- MLM-3307; ON: DE86002524
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTIVITY
AMMONIA
CHEMICAL ANALYSIS
CHEMICAL EXPLOSIVES
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
COBALT COMPLEXES
COBALT COMPOUNDS
COBALT PERCHLORATES
COMPARATIVE EVALUATIONS
COMPLEXES
DATA
DECOMPOSITION
DETONATION LIMITS
DPPH
EXPERIMENTAL DATA
EXPLOSIVES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
NITRO COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PERCHLORATES
PH VALUE
PHYSICAL PROPERTIES
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RADICALS
SPECTROPHOTOMETRY
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400201* -- Chemical & Physicochemical Properties
ABSORPTIVITY
AMMONIA
CHEMICAL ANALYSIS
CHEMICAL EXPLOSIVES
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
COBALT COMPLEXES
COBALT COMPOUNDS
COBALT PERCHLORATES
COMPARATIVE EVALUATIONS
COMPLEXES
DATA
DECOMPOSITION
DETONATION LIMITS
DPPH
EXPERIMENTAL DATA
EXPLOSIVES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
NITRO COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PERCHLORATES
PH VALUE
PHYSICAL PROPERTIES
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RADICALS
SPECTROPHOTOMETRY
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS