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Updated: Jul 4, 2026

Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study

Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study

Published on: August 15, 2016

Inclusion complex-based solid-phase extraction of steroidal compounds with entrapped beta-cyclodextrin polymer.

Ju-Yeon Moon¹, Hyun-Jin Jung, Myeong Hee Moon

¹Life Sciences Division, Korea Institute of Science and Technology, 39-1 Hawolkok-dong, Seoul 136-791, Korea; Deparment of Chemistry, Yonsei University, 134 Sinchon-dong, Seoul 120-749, Korea.

|June 13, 2008

Summary

A new beta-cyclodextrin (betaCD) solid-phase extraction method improves steroid recovery, offering better selectivity and efficiency than traditional hydrophobic techniques for analyzing androgens, estrogens, and corticoids.

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Area of Science:

Analytical Chemistry
Biochemistry
Environmental Science

Background:

Traditional hydrophobic solid-phase extraction (SPE) shows variable yields for steroids due to differing molecular properties.
Comprehensive analysis of diverse steroids requires improved sample purification techniques.

Purpose of the Study:

To develop a novel SPE technique for enhanced purification of a wide range of steroids.
To evaluate the efficiency of beta-cyclodextrin (betaCD)-based SPE for analyzing androgens, estrogens, and corticoids.

Main Methods:

A copolymer of beta-cyclodextrin with epichlorohydrin was synthesized and entrapped with CaCl(2) to create a new SPE sorbent.
Hydrolyzed urine samples containing 77 different steroids were purified using the betaCD-based SPE method.
Extraction efficiency was compared against a conventional Oasis HLB cartridge.

Main Results:

The betaCD-based SPE achieved overall recoveries ranging from 82% to 112% for 77 steroids.
Hydroxylated estrogens exhibited excellent binding capacity (96-116% recovery) via hydrogen bonding.
This method significantly increased the extraction efficiency of polar steroids compared to hydrophobic SPE.

Conclusions:

The novel betaCD-entrapped polymer offers superior selectivity and extraction efficiency for steroids.
Its multi-functional mechanism, combining molecular inclusion and chemical interactions, overcomes limitations of conventional hydrophobic SPE.
This technique provides a more comprehensive approach for mass spectrometric analysis of complex steroid mixtures.