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Surfactant enhanced flow injection chemiluminescence method for vitamin D 3 determination in pharmaceutical formulations.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 2019 Februrary 6
A flow injection based chemiluminescence process has been reported for vitamin D3 determination without using especial chemiluminescence reagent. Vitamin D3 shows enhancement on the CL intensity of diperiodatocuprate(III) with surfactant (Triton X-100) solution. The calibration curve was found to be linear over the concentration range 0.01-40 mg/L (R2 = 0.9997, n = 8) tested. A limit of detection (S/N = 3), limit of quantification (S/N = 10) and sample injection throughput of 2.5 × 10-3 , 8.3 × 10-3 mg/L and 150 h-1 respectively were obtained. Various experimental variables were tested to get most suitable response, e.g., the concentrations of reagents, and their flow rates, sample injection volume and photomultiplier tube voltage. The effect of potential interferences was also examined. Vitamin D3 determination was successfully carried out in pharmaceutical formulations. The recoveries from the formulations were obtained in the range of 96 ± 4-108 ± 2%. The reaction mechanism discussion for diperiodatocuprate(III) complex-Triton X-100-vitamin D3 was also included.
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