A Cost-Effective Nonaqueous Reversed-Phase High-Performance Liquid Chromatography Method to Measure Vitamin D3 in Hen's Egg Yolk

Overview

Journal J Sep Sci

Date 2025 Jan 23

PMID 39846348

Authors

Ina Varfaj

Alice Cartoni Mancinelli

Anna Migni

Laura Mercolini

Cesare Castellini

Francesco Galli

Desiree Bartolini

Roccaldo Sardella

Affiliations

Soon will be listed here.

Abstract

The objective of this study is to develop an HPLC-UV method for the cost-effective and quantitative determination of vitamin D3 in food, even in the presence of vitamin D2, with a specific focus on egg yolk. During method development, the performance of three stationary phases in resolving the peak of vitamin D2 from that of vitamin D3 was investigated. The physicochemical properties of these phases differed particularly in the extent of hydrophobicity and silanophilic activity, including a GraceSmart RP C18 column without silanol endcapping, a Robusta RP C18 column with silanol endcapping, and a Waters Xbridge RP C18 column with ethylene-bridged hybrid (BEH) particle technology. The Xbridge C18 stationary phase exhibited the most favorable performance, leading to an R of 1.6 under the following nonaqueous reversed-phase (NARP) experimental conditions: mobile phase, acetonitrile, methanol, and trifluoroacetic acid in a (99/1/0.1, v/v/v) ratio; column temperature, 15°C. The developed chromatographic method does not require preanalytical purification steps and is also compatible with mass spectrometry. The identity of the vitamin D3 peak observed in the HPLC analysis was verified via GC-MS. The NARP-HPLC-UV method was partially validated, demonstrating satisfactory linearity, precision, accuracy, limit of quantification, and robustness. The HPLC method was then successfully applied to the analysis of real egg yolk samples, revealing average concentrations of vitamin D3 of 4-5 µg/g of wet weight sample.

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