A solid phase extraction method for sample clean-up and preconcentration of vitamin B12 in multivitamin tablet and its determination by HPLC-UV, UV and atomic absorption spectrophotometry is reported. Solid phase parameters such as maximum loading capacity and breakthrough volume were 400 μg and 1750 mL of 0.001 ppm for this vitamin respectively. A proper mobile phase used for HPLC was water/acetonitrile (75:25, v/v) with pH = 3.5 (adjusted with acetate buffer) at 25°C. Limit of detection and linear dynamic range for HPLC, UV and atomic absorption were 0.1, 0.1-25.0; 0.4, 0.4 -15.0; 2.7, 2.7-300.0 (μg/mL) respectively. Recovery of vitamin B12 was about 96%.
Hadjmohammadi, M.R. and Sharifi, V.
"Use of solid phase extraction for sample clean-up and preconcentration of vitamin B12 in multivitamin tablet before HPLC-UV, UV and atomic absorption spectrophotometry,"
Journal of Food and Drug Analysis: Vol. 15
, Article 7.
Available at: https://doi.org/10.38212/2224-6614.2410