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Summary

A simple, rapid, and specific thin layer chromatographic (TLC) method has been developed and validated for the simultaneous estimation of icariin and l-arginine from commercial polyherbal formulations for sexual dysfunction. The separation of the methanol extract of these formulations was achieved on silica gel 60 F254 aluminum backed TLC plates by using ethyl acetate-acetone-glacial acetic acid-formic acid-water 12:2:1:2:2 (υ/υ) as mobile phase. Densitometric analysis of icariin and l-arginine was monitored in absorbance mode at 270 and 195 nm, respectively. The linear regression analysis data for the calibration plots for icariin and l-arginine showed good linear relationship with r 2 = 0.9984 +- 0.01 and 0.9968 +- 0.02, in the concentration ranges of 250–750 and 500–1500 ng/spot, respectively. The method was validated for precision, robustness, and recovery. The average percentage recovery was found to be 98.26% for icariin and 99.63% for l-arginine. The limits of detection and quantitation were 72, 116 and 238, 383 ng/spot, respectively, for icariin and l-arginine. Statistical analysis proves that the method is repeatable and selective for the estimation of the targeted drugs. Since the proposed mobile phase effectively resolves the icariin and l-arginine, this method can be applied for the identification and quantitation of these components in herbal extracts and marketed formulations.

Open access

Summary

A simple and sensitive method of high-performance liquid chromatography with fluorescence detection (HPLC-FLD) was developed for the determination of icariin in capsules by precolumn chelation with aluminum. In order to obtain a stable fluorescence signal, the reaction conditions of the fluorescent chelation complex between icariin and aluminum were investigated in detail. Chromatography was carried out on an Agilent Zorbax Extend C18 column (150 mm × 4.6 mm, 5.0 μm) using methanol as mobile phase at a flow rate of 1.0 mL min−1. The excitation and emission wavelengths were set at 430 and 480 nm, respectively. At optimum conditions, the calibration curve was linear in the concentration range from 0.010 to 100.0 μg mL−1 with the limit of detection of 3.5 ng mL−1 (S/N = 3). A comprehensive method was validated for precision and accuracy. The method described here has been successfully applied for the determination of the icariin content in a capsule with satisfactory results.

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) 4. Bao H , Chen L : [Icariin reduces mitochondrial oxidative stress injury in diabetic rat hearts] . Zhongguo. Zhong. Yao. Za. Zhi. 36 , 1503 – 1507 ( 2011

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/β-catenin signalling pathways, icariin and orexins facilitated the differentiation and proliferation of osteoblasts, which was compatible with the findings of this paper. In order to preserve the equilibrium of bone density, the canonical Wnt

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Emodin–phospholipid complex

A potential of herbal drug in the novel drug delivery system

Journal of Thermal Analysis and Calorimetry
Authors:
Devendra Singh
,
M. S. M. Rawat
,
Ajay Semalty
, and
Mona Semalty

. 23. Li , Y , Duan , J , Guo , T , Xie , W , Yan , S , Li , B , Zhou , Y , Chen , Y . In vivo pharmacokinetics comparisons of icariin, emodin and psoralen from Gan-kang granules and extracts of Herba Epimedii

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.L. , Leong , L. , … and Hsiao , W.L. ( 2021 ). Icariin enhances youth-like features by attenuating the declined gut microbiota in the aged mice

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− H]−1 448.10056 4.12 447.09512,284.03400,255.03116,227.03607 C21 H20 O11 astragalin 68 17.229 [M + H]+1 676.23672 3.58 531.18823,369.13461,313.07187,85.02866 C33 H40 O15 Icariin 69 17.340 [M − H]−1 480.16316 4.35 479

Open access