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Related Concept Videos

High-Performance Liquid Chromatography: Instrumentation00:57

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High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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Determination of Cholesterol Content in Butter by HPLC: Up-to-Date Optimization, and In-House Validation Using

Lukáš Kolarič1, Peter Šimko1

  • 1Faculty of Chemical and Food Technology, Institute of Food Science and Nutrition, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.

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Summary

This study optimized cholesterol determination in butter using improved saponification, extraction, and High-Performance Liquid Chromatography (HPLC) methods. The validated technique accurately measures cholesterol content, crucial for food analysis and quality control.

Keywords:
HPLCbuttercholesterolextractionoptimizationsaponificationvalidation

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry

Background:

  • Accurate cholesterol determination is vital for food product analysis.
  • Existing methods for cholesterol analysis may require optimization for efficiency and accuracy.

Purpose of the Study:

  • To optimize saponification, extraction, and High-Performance Liquid Chromatography (HPLC) conditions for cholesterol determination.
  • To validate a new method for cholesterol content analysis in butter.

Main Methods:

  • Optimized saponification using methanolic KOH and heating.
  • Optimized double extraction with n-hexane-chloroform.
  • HPLC analysis with isocratic elution using acetonitrile/methanol mobile phase on a C18 column.

Main Results:

  • Optimal saponification: 15 min heating, 0.015 L of 1 mol/L methanolic KOH.
  • Optimal extraction: 0.015 L n-hexane-chloroform (1:1, v/v).
  • Average cholesterol content in butter determined as 2271.0 mg/kg.

Conclusions:

  • The developed method is suitable for accurate cholesterol determination in butter.
  • The method shows potential for application in other dairy products.
  • Optimized analytical procedures enhance the reliability of food composition analysis.