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Supercritical Fluid Extraction of Bisphenol A in Epoxy Resin

By Kohei Tamura

July 9, 2025

Introduction

Bisphenol A considered as endocrine disruptors were extracted using Supercritical Fluid Extraction (SFE) with carbon dioxide and analyzed by reversed-phase HPLC.

Fig.1 shows the chromatograms of the extracts from epoxy resins used for coating of artificial leather, electrical cables, etc.

Fig. 1 Chromatograms of bisphenol A-STD sample and epoxyresin extraction sample

Pretreatment

Sample
↓
Extraction by supercritical fluid
↓
Recovery of extracted solution
↓
Concentration
↓
Sample volume in measuring flask by
CH3OH/H2O (50/50)
↓
Injection into HPLC

Conditions

SFE

System:	SCF-201
Extraction vessel:	1 mL
CO₂ flow rate:	3.0 mL/min
CH₃OH flow rate:	0.3 mL/min
Extraction Pressure:	25 Mpa
Sample:	Synthetic leather Covering for AC cable

HPLC

Column:	CrestPak C18S (4.6 mm I.D. x 150 mm L.)
Eluent:	CH₃OH / H₂O (50/50)
Wavelengths:	Ex 282 nm, Em 306 nm, Gain x 100
Flow rate:	1.0 mL/min
Sample:	Standard (100 ppb) Extracts of coating material of artificial leather and electrical cable
Injection volume:	10 µL

Keywords

Bisphenol A; STD, epoxy resins; SFE; Fluorescence detection; endocrine disruptor

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