PubMed · 96624
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R D Hempel, W Farr, R J Haschen, E Mertens. 1978-02-02. [Comparison between T4 (c) and T4 (D)].. https://pubmed.ncbi.nlm.nih.gov/96624/
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Chromatography and immunoassays are the two principal techniques used in research and clinical laboratories for the measurement of drug concentrations in biological fluids. The purpose of this article is to provide the reader with a general overview of these techniques and to present their relative merits and limitations. A glossary of technical terms is included at the end of the review.
Capillary SFC was used for the determination of oleanolic acid in Achyranthes bidentata BLume and its preparations Tianmawan, Jinguishenqiwan and Hechedazaowan. The amount of oleanolic acid in the root of Achyranthes bidentata BLume was 1.75-2.19% (mean +/- SD = 1.94 +/- 0.17%). The limit of detection was 9.605 x 10(-11) g. The method is highly sensitive, accurate, reproducible, simple, rapid and specific, so, it can be extensively used for the determination of other preparations and crude herbs.
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