This article describes the method for analyzing metals in synthetic fibers and plastic materials. Atomic absorption spectrophotometry is suitable for the rapid and accurate analysis of metals in polymeric materials.
The document presents an application note from Agilent Technologies regarding the analysis of metals in synthetic fibers and plastic materials. It focuses on determining calcium, tin, titanium, and zinc in a sheet of polyvinylchloride (PVC) that contains a relatively high amount of titanium using atomic absorption spectrophotometry.
The text details the experimental procedure for sample preparation, including dissolving PVC with nitric and perchloric acids. It provides specific instrument parameters such as resonance lines, lamp currents, spectral band passes, and flame types for each metal analyzed. The note also discusses standard solution concentrations and potential interferences, particularly regarding sodium in titanium analysis.
| Line (A) for Calcium | 4226.7 A |
|---|---|
| Lamp Current for Tin | 8 mA |
| Flame type for Zinc | Air-C,H, |
| Normal concentration range of standards for Calcium | 0.5 to 8.0 ppm Ca |
The method is employed for the analysis of calcium, tin, titanium and zinc.
The hotter N,O-C,H, flame is preferred to eliminate or minimize possible chemical interferences.
Sodium causes an interference on titanium absorbance in the presence of hydrofluoric acid.