A sleep disorder is a condition in which a person is unable to take a sleep or is disturbed when sleeping because of a disturbed sleep rhythm, and includes symptoms such as insomnia, narcolepsy, restless legs syndrome, snoring, sleep apnea. According ...
A sleep disorder is a condition in which a person is unable to take a sleep or is disturbed when sleeping because of a disturbed sleep rhythm, and includes symptoms such as insomnia, narcolepsy, restless legs syndrome, snoring, sleep apnea. According to the domestic research trend analysis of sleep disorder, 31% of the adults reported difficulty in sleeping, frequent sleeping, and early awakening, and 56.9% of the elderly reported a change in sleep patterns compared to the younger ones. People are experiencing a surge in sleep disorder patients due to excessive stress and use of smartphones. There is much interest in functional materials that have been validated to relieve symptoms of sleep disorders and to prevent chronic diseases.
Passionflower are perennial plants grown in the subtropical and tropical regions of perennial plants. Passiflora species contain several compounds, including alkaloids, phenols, glycosyl flavonoids, and cyanide compounds. Passiflora incarnata's representative C-glycoside flavonoids include vitexin, isovitexin, orientin, and isoorientin. Vitexin is a flavonoid glycoside, a compound found in Passionflowers, Vitexin agnus-castus, Phyllostachys nigra bamboo leaves and Hawthorn. Passionflowers have been shown to stabilize the nerves and to stabilize the nerves and have proved effective as traditional herbal sedatives, anxiolytics and sleep aids widely used in the treatment of sleep disorders. For the standardization of passionflower extract powder containing various physiological functions, vitexin, a flavonoid compound, was set up as an index component. HPLC method was used to establish the analytical method of vitexin as an indicator and to perform validation.
Standardization in the development and production of health functional foods is very important. Standardization refers to a good manufacturing process standard to reduce the minimum difference in processing from raw material to finished product in order to maintain the target component in the manufacturing process. The standardization method of the marker component is most commonly used. The marker component is present in natural products and is selected for standardization. It is a standard component of standardization based on the stability, the ease of analysis technology, time and cost analysis, researchers and developers, should be performed.
In order to verify the Vitexin assay, specificity, accuracy, precision, linearity, detection limit, quantitation limit and recovery rate were analyzed based on 'Guideline for Validation of Analytical Methods such as Drugs'. Specificity was determined by HPLC analysis of vitexin standard solution and pretreated Passionflora incarnata extract powder to determine retention time and photo diode array (PDA) spectrum on chromatogram to show the same spectrum. The accuracy measures the variability of intra-day and inter-day analyzes. The reproducibility of HPLC analysis was confirmed by intra-day and inter-day analyzes of vitexin (10, 25 and 50 μg/mL). Accuracy was measured three times repeatedly at three concentrations of the prepared standard, and the percentage of the result close to the true value was expressed as a percentage. Intra-day was divided into 3 sections, and inter-day was conducted for 1 day and 1 section. Precision was measured by repeating the standard solutions at 10, 25 and 50 ㎍/mL six times, respectively, relative standard deviations. Relative standard deviation (RSD) was calculated as a percentage by dividing the standard deviation by the mean. The standard solution was diluted stepwise with 1~50 ㎍/mL and analyzed by HPLC. A calibration curve was drawn for the area of concentration, and the linearity was confirmed as r2 value. In addition, the signal to noise (S/N) ratio of the peaks at each concentration was determined with the standard calibration curve, and the limit of detection was calculated when the S/N ratio was 3.3 and the detection limit and S/N ratio were 10. For the recovery, three concentrations of standard solutions (10, 25 and 50 ㎍/mL) were added to a blank (vitamin drink) that did not contain vitexin by the pretreatment method used in this study. The area obtained by HPLC analysis was compared with the area of the standard solution and the recovery was calculated as a percentage using the mean and relative standard deviation (RSD).
Validation of vitexin as a marker compound in the standardization of Passiflora incarnata extract powder developed for functional health food was attempted by analytical method. The specificity was satisfied with retention time and photo diode array (PDA) spectrum by analysis of vitexin using HPLC and comparison with standard compound. RSD value of accuracy in intra-day was less than 0.98%, and inter-day was less than 1.36%, respectively. In the precision measurement reults, the RSD was 0.62~0.84%. It showed a high linearity in the calibration curve as coefficient of correlation (R2) of 0.9998, and the limit of detection (LOD) and limit of quantitation (LOQ) were 0.01 ㎍/mL and 0.03 ㎍/mL, respectively. Recovery rate test with vitextin concentration of 10, 25 and 50 ㎍/mL was revealed 95.07~95.46%, 96.51~97.03% and 96.73~97.48%, respectively. Therefore, application of vitexin was validation in analytical method as a marker compound in Passiflora incarnata extract powder. The content of vitexin in Passiflora incarnata extract powder was found to be 2.52 mg/g. In addition, it was confirmed that malto dextrin and silicon dioxide excipients did not interfere with the analysis. Therefore, it is considered that the vitexin method, which has been established through this study, will be used as a basic data for the development of functional ingredients for health functional foods, each of which is a Passiflora incarnata extract powder.