Determination of lead oxide and sulfate content in polyvinyl chloride used for cable insulation
The purpose of this paper is to develop a rapid and reproducible procedure for determining lead as the key component of polyvinyl chloride (PVC) stabilizers, used for cable insulation. To develop this method, the authors paid attention also to the effect of the other inorganic ions present in the insulation. Lead ions can be determined complexometrically using xylenol orange as an indicator. The authors efforts to determine lead in the inorganic residue of cable insulation by direct titration with EDTA solution did not yield satisfactory results due to the difficulty in pinpointing the moment of color change at the end of the titration, so the authors employed back titration, binding lead(II) into a stable complex of lead by treating the mixture with an excess of EDTA under heating, and determining this excess by titration with a standard solution of lead (nitrogen trioxide). Since complexometric determination is carried out in an acidic medium, Al(III), Fe(III), and Cu(II) are titrated together with lead ions. The authors recommend this method for separate determinations of lead oxide and sulfate determination in PVC used for cable insulation.
- Research Organization:
- A. Zlatarov Institute of Chemical Technology, Burgas, Bulgaria
- OSTI ID:
- 6251236
- Journal Information:
- Ind. Lab. (Engl. Transl.); (United States), Vol. 52:9; Other Information: Translated from Zavod. Lab.; 52: No.9, 3-4(Sep 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTRIC CABLES
ELECTRICAL INSULATION
LEAD OXIDES
COMPLEXOMETRY
TITRATION
LEAD SULFATES
PVC
QUANTITATIVE CHEMICAL ANALYSIS
ACCURACY
DISSOLUTION
EFFICIENCY
REAGENTS
SERVICE LIFE
STABILIZATION
TEMPERATURE EFFECTS
XYLENOL ORANGE
CABLES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORINATED ALIPHATIC HYDROCARBONS
CONDUCTOR DEVICES
DYES
ELECTRICAL EQUIPMENT
EQUIPMENT
HALOGENATED ALIPHATIC HYDROCARBONS
INDICATORS
LEAD COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
POLYVINYLS
SULFATES
SULFUR COMPOUNDS
400105* - Separation Procedures