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Assay for hydralazine as its stable p-nitrobenzaldehyde hydrazone
1Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Canada.
Pharmaceutical Research
|June 1, 1988
Summary
A novel analytical method for hydralazine, an antihypertensive drug, offers high sensitivity and stability. This assay simplifies hydralazine detection in blood samples, improving upon existing selective methods.
Area of Science:
- Analytical Chemistry
- Pharmacology
Background:
- Hydralazine is a widely used antihypertensive medication.
- Accurate and sensitive methods for hydralazine analysis are crucial for therapeutic drug monitoring and pharmacokinetic studies.
- Existing analytical methods may lack sufficient sensitivity, stability, or simplicity.
Purpose of the Study:
- To introduce a new, sensitive, and stable analytical method for quantifying hydralazine in blood.
- To establish a reliable assay for hydralazine analysis suitable for clinical and research applications.
Main Methods:
- A novel assay involving the derivatization of hydralazine with p-nitrobenzaldehyde to form a stable Schiff's base.
- Extraction of the derivative into hexane, followed by drying under a nitrogen stream.
- Analysis of the extracts using high-performance liquid chromatography (HPLC).
Main Results:
- The assay demonstrates high sensitivity, with a detection limit better than 300 pg/ml using 3-ml blood samples.
- The analytical range extends up to 640 ng/ml.
- Extracted samples exhibit excellent stability, remaining viable for at least 7 days at room temperature or -20 degrees C.
Conclusions:
- The developed method offers significant advantages in terms of sample stability, sensitivity, and operational simplicity compared to other selective hydralazine assays.
- This new analytical approach provides a robust tool for hydralazine quantification in biological matrices.