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Fabrication of Carbon Nanotube-Polylactic Acid Composite Electrode by Melt Compounding for Capillary Electrophoretic Determination of Tectoridin and Irigenin in Belamcandae Rhizoma

Fabrication of Carbon Nanotube-Polylactic Acid Composite Electrode by Melt Compounding for Capillary Electrophoretic Determination of Tectoridin and Irigenin in Belamcandae Rhizoma

Hua Mao, Xinming Ye, Weilong Chen, Wenye Geng, Gang Chen

J Pharm Biomed Anal. 2019 Oct 25;175:112769.

PMID: 31398628

Abstract:

A sensitive detection electrode based on the composite of carbon nanotubes (CNTs) and polylactic acid (PLA) was fabricated for measuring the bioactive constituents in Belamcandae Rhizoma by capillary electrophoresis (CE). The composite was facilely fabricated by packing a blend of CNTs and melted PLA into a fused silica capillary under heat. The prepared CNT-PLA composite was characterized by scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and cyclic voltammetry. The results indicated that PLA bound electrically conductive CNTs to form a well-dispersed composite network for electrochemical sensing. The electrode was employed to the off-line detection of tectoridin and irigenin in Belamcandae Rhizoma to demonstrate its performance in capillary electrophoresis. At a separation voltage of 12 kV, the two isoflavones were well separated and detected within 8 min in a 40-cm fused silica capillary in a borate buffer at pH 9.8. The detection limits for tectoridin and irigenin were measured to be 0.24 and 0.21 μM, respectively.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP548765	Irigenin		548-76-5	Price

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