scholarly journals Determination of Flavonoids Compounds of Three Species and Different Harvesting Periods in Crataegi folium Based on LC-MS/MS

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1602
Author(s):  
Ya-Ping Guo ◽  
Hong Yang ◽  
Ya-Li Wang ◽  
Xiao-Xiang Chen ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Qualitative Analysis ◽  
Quantitative Method ◽  
Total Content ◽  
Qualitative And Quantitative Analysis ◽  
Pharmacological Activities ◽  
Time Saving ◽  
Qualitative And Quantitative ◽  
First Time

Crataegi folium have been used as medicinal and food materials worldwide due to its pharmacological activities. Although the leaves of Crataegus songorica (CS), Crataegus altaica (CA) and Crataegus kansuensis (CK) have rich resources in Xinjiang, China, they can not provide insights into edible and medicinal aspects. Few reports are available on the qualitative and quantitative analysis of flavonoids compounds of their leaves. Therefore, it is necessary to develop efficient methods to determine qualitative and quantitative flavonoids compounds in leaves of CS, CA and CK. In the study, 28 unique compounds were identified in CS versus CK by qualitative analysis. The validated quantitative method was employed to determine the content of eight flavonoids of the leaves of CS, CA and CK within 6 min. The total content of eight flavonoids was 7.8–15.1 mg/g, 0.1–9.1 mg/g and 4.8–10.7 mg/g in the leaves of CS, CA and CK respectively. Besides, the best harvesting periods of the three species were from 17th to 26th September for CS, from 30th September to 15th October for CA and CK. The validated and time-saving method was successfully implemented for the analysis of the content of eight flavonoids compounds in CS, CA and CK for the first time.

Qualitative and quantitative determination of trace aldehydes and ketones in food preservative propionic acid for quality improvement

2021 ◽  
Author(s):  
Yiwen Cao ◽  
Shenjie Zhu ◽  
Lin Zhang ◽  
Qun Cui ◽  
Haiyan Wang
Keyword(s):  
Quality Improvement ◽  
Quantitative Analysis ◽  
Quantitative Determination ◽  
Propionic Acid ◽  
Qualitative And Quantitative Analysis ◽  
Food Preservative ◽  
Qualitative And Quantitative ◽  
Aldehydes And Ketones ◽  
Aldehyde Content

Aiming at the difficulty in qualitative and quantitative analysis of trace compositions in food preservative propionic acid, the trace compositions and the key components influencing the total aldehyde content in...

Determination of m-Cresol and p-Cresol in Industrial Cresols by Raman Spectrometer

2012 ◽  
Vol 468-471 ◽  
pp. 1104-1109
Author(s):  
Hui Ying Yu ◽  
Ping Yan
Keyword(s):  
Quantitative Analysis ◽  
Cross Section ◽  
Deformation Vibration ◽  
Testing Time ◽  
Qualitative And Quantitative Analysis ◽  
Raman Spectrometer ◽  
Qualitative And Quantitative ◽  
Gc Analysis

Adopting raman spectrometer to conduct qualitative and quantitative analysis of m-cresol and p-cresol, selecting the respective character peak of bencycloquidium after deformation vibration (m-cresol at 732 cm-1 and p-cresol at 841 cm-1), via experiment and calculations, the relative raman cross section of m-cresol and p-cresol can be concluded:(∂σ/∂Ω)732cm-1/(∂σ/∂Ω)1000cm-1 is 0.74 (height-fitting of the peak), and 0.61 (area-fitting of the peak). This method samples simply and rapidly, and has a short testing time, whose quantitative analysis result of m-/p-cresol is consistent with that of GC analysis.

scholarly journals UPLC-MS/MS Identification and Quantification of Withanolides from Six Parts of the Medicinal Plant Datura Metel L.

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1260
Author(s):  
Shi Hui Yang ◽  
Yan Liu ◽  
Qi Wang ◽  
Yan Ping Sun ◽  
Wei Guan ◽  
...  
Keyword(s):  
Total Content ◽  
Qualitative And Quantitative Analysis ◽  
Plant Parts ◽  
Datura Metel ◽  
Value Range ◽  
Solid Foundation ◽  
G Value ◽  
Production Areas ◽  
First Time

Withanolides from six parts (flower, leaf, stem, root, seed, and peel) of Datura metel L. (D metel L.) obtained from ten production areas in China were identified and quantified by UPLC-MS/MS. A total of 85 withanolides were characterized for the first time using the UPLC-Q-TOF-MS/MS system. Additionally, a simultaneous, rapid and accurate measurement method was developed for the determination of 22 bioactive withanolides from ten production areas with the UPLC-Q-TRAP-MS/MS system. The results show the total withanolide content is highest in the leaves (155640.0 ng/g) and lowest in the roots (14839.8 ng/g). Compared with other production areas, the total content of plants from Dujiangyan was the highest at 82013.9 ng/g (value range of ten areas: 82013.9–42278.5 ng/g). The results also show significant differences in the distribution of withanolides in the different plant parts, as well as across different production areas. This is a breakthrough report providing a simultaneous qualitative and quantitative analysis of 22 withanolides in D. metel L. It could be the basis for the more rational use of various parts of D. metel L., and the expansion of medicinal resources. This work also lays a solid foundation for research on the quality control of D. metel L.

X-Ray Fluorescence in Cotton Modification Research

1964 ◽  
Vol 8 ◽  
pp. 456-461
Author(s):  
Donald Mitcham ◽  
Biagio Piccolo ◽  
Verne W. Tripp ◽  
Robert T. O’Connor
Keyword(s):  
Quantitative Analysis ◽  
Cotton Textile ◽  
Qualitative And Quantitative Analysis ◽  
X Ray ◽  
Textile Materials ◽  
Qualitative And Quantitative ◽  
Chemically Modified ◽  
Elapsed Time

AbstractThe application of X-ray fluorescence to the qualitative and quantitative analysis of chemically modified cotton textile materials is described. The scope and flexibility of the technique have permitted the determination of more than 20 elements with, greatly reduced elapsed time compared with the corresponding spectroscopic or wet methods. Precautions to be observed in preparing standards are discussed. Results of the analysis of typical modifications and their significance in the development of cottons for specific uses are described.

Qualitative Analysis and Quantitive Account for Tunnel Fire Location

2010 ◽  
Vol 143-144 ◽  
pp. 1347-1351
Author(s):  
Ling Qi Zhu ◽  
Xin Quan Zhou
Keyword(s):  
Numerical Simulation ◽  
Quantitative Analysis ◽  
Qualitative Analysis ◽  
Fuzzy Clustering ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Tunnel Fire ◽  
Location Judgment ◽  
Sets Theory ◽  
Fire Location

Fire is one of the major hazards in coal mines. After the fire broke out.the primary task of disaster rescue is to judge the location of fire and it is the prerequisite of analyzing the combustion state, the base of fire prediction. In this paper, the method of tunnel fire location judgment combining with qualitative and quantitative analysis is used, it includes the qualitative analysis basing on sets theory and quantitative analysis on fuzzy clustering. The potential location can be conversely reasoned by the warning sensors and the scope can be narrowed down widely. On this basis, the distance and similarity between the veritable time difference and the numerical simulation difference are calculated and by the value we can know the site of the fire.

scholarly journals LABOR CAPACITY OF DEAF WORKERS ON THE WORKPLACE: QUALITATIVE ANALYSIS OF THE ATTITUDES OF DEAF WORKERS AND THEIR CO-WORKERS WITHOUT HEARING IMPAIRMENT

2019 ◽  
Vol 9 (2) ◽  
pp. 40-47
Author(s):  
Admira Beha ◽  
◽  
Husnija Hasanbegović ◽  
Keyword(s):  
Quantitative Analysis ◽  
Qualitative Analysis ◽  
Work Environment ◽  
Hearing Impairment ◽  
Statistical Significance ◽  
Deaf People ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Significant Difference ◽  
Wilks Lambda

The aim of this paper is to determine the opinions of deaf workers on their labor capacity and the opinions of their hearing co-workers about the labor capacities of the deaf. The sample consisted of 247 respondents, of whom 127 were deaf and 120 were hearing workers. Qualitative and quantitative analysis were used in processing the results. Testing was performed by Wilks' Lambda, tested significance in discriminant analysis was done by F test, at the statistical significance of 0.01. It was found that the sub-sample of respondents had a statistically significant difference in views on claims regarding the exploitation of deaf workers by employers, the employment of deaf people in low-paid simple occupations, and the equally successful but insignificant productivity of deaf workers. The statistical differences found indicate that there are differences in the assessment of the labor capacity of deaf workers in the hearing work environment. Qualitative analysis found that hearing impairment and the subjective attitudes of colleagues without hearing impairment have the greatest impact on the assessment of the labor capacity of deaf workers.

scholarly journals Application of optical microscopy for the qualitative and quantitative analysis of the solid surface

2020 ◽  
Vol 20 (2) ◽  
pp. 41-64
Author(s):  
A.A. Dedkova ◽  
◽  
M.A. Makhiboroda ◽  
Keyword(s):  
Quantitative Analysis ◽  
Optical Microscopy ◽  
Surface Relief ◽  
Complex Analysis ◽  
Dark Field ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Surface Measurements ◽  
Defects Analysis

The possibilities of optical microscopy for preliminary and complex analysis of structures, which are used mainly in microelectronics and micromechanics, are demonstrated. Specific examples of the use of optical microscopy for qualitative and quantitative analysis, development of technological processes, control of defects, analysis of surface relief, determination of the parameters of structures are given. Surface measurements are performed in reflected and transmitted light, using bright and dark field modes.

Chain Length Determination of Fatty Acids by Raman Spectroscopy

1973 ◽  
Vol 51 (23) ◽  
pp. 3901-3904 ◽  
Author(s):  
Charles H. Warren ◽  
Donald L. Hooper
Keyword(s):  
Fatty Acids ◽  
Raman Spectroscopy ◽  
Quantitative Analysis ◽  
Long Chain Fatty Acids ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Odd Order ◽  
Length Determination ◽  
Long Chain

For saturated long chain fatty acids, as for hydrocarbons, the odd order "accordion mode" vibrations are Raman active. These "accordion mode" vibrations have been used to provide qualitative and quantitative analysis of mixtures of acids in the range C12–C24.

scholarly journals Penentuan Kadar Glukosa Urine di Laboratorium Rumah Sakit Sari Mutiara Medan

2019 ◽  
Vol 1 (2) ◽  
pp. 53-57
Author(s):  
Fitri Dian Puspa Nadeak ◽  
Riyanto Riyanto ◽  
Rosliana Lubis
Keyword(s):  
Quantitative Analysis ◽  
Qualitative Analysis ◽  
Research Method ◽  
Color Change ◽  
Qualitative And Quantitative Analysis ◽  
Urine Glucose ◽  
Qualitative And Quantitative ◽  
Reaction Tube ◽  
Positive Urine ◽  
Analysis Of Urine

The purpose of this study was to determine urine glucose level in patients who came to the Sari Mutiara General Hospital in Medan. Research method with qualitative and quantitative test, qualitative analysis of urine glucose by inserting urine sample 5 - 8 drops into reaction tube that already contains 5ml of benedict solution, then burned on fire and observe the color change that occurs, quantitative analysis of urine glucose by adding sodium carbonate and 2 rounds of boiling stone into a reaction tube containing 5 ml of benedict solution, burned over a flame, then drop urine using a 1 ml pipette, while dripping urine, the liquid should not stop boiling, the titration ends when the blue is not look again.The results of qualitative and quantitative analysis were obtained from 25 test samples, 15 positive urine glucose patients, and 10 negative urine glucose patients.

scholarly journals 29Si AND 27Al CPMAS NMR QUALITATIVE AND QUANTITATIVE ANALYSIS OF KAOLINITE AND DICKITE IN KOS ISLAND KAOLINS, GREECE

2007 ◽  
Vol 40 (2) ◽  
pp. 936
Author(s):  
D. Papoulis
Keyword(s):  
Quantitative Analysis ◽  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Qualitative And Quantitative Analysis ◽  
Group Mineral ◽  
Qualitative And Quantitative ◽  
Exact Position ◽  
Structural Formulae ◽  
First Time

The application of 27Al and 29Si CPMAS NMR spectroscopy to the investigation of selected /caolinite and dickite bearing samples from hydrothermally altered rhyolites of Kos island is tested using also XRD and analytical SEM-EDS data. Kaolinite and dickite, can be detected by both their tetrahedral Si and octahedral Al CPMAS NMR spectra. It was found that the interference of the peaks become less significant and the shape of the peaL· narrow when the pulse recycling delay is high (up to 10s). The octahedral Al / tetrahedral Si ratios of kaolinite group mineral forms from samples showing various degrees of alteration, calculated from the NMR spectra, were found to be very similar to these derived from the structural formulae of SEM-EDS microanalyses. In this work it is presented for the first time an approach to provide narrow CPMAS NMR peaks. The narrow shape of the peaks provides accurate measurements of the exact position of the peaL· and the octahedral Al / tetrahedral Si ratios.

Sign in / Sign up

Export Citation Format

Share Document