Average Mass Scan of the Total Ion Chromatogram versus Percentage Chemical Composition in Multivariate Statistical Comparison of Complex Volatile Mixtures
نویسندگان
چکیده
A análise de misturas voláteis complexas usando cromatografia gasosa-espectrometria de massa (CG-EM) é um processo demorado. Este processo envolve a separação e identificação de componentes baseados em seus tempos de retenção e padrões de fragmentação, seguido da determinação de suas porcentagens relativas a partir da integração das áreas dos picos. No presente trabalho mostramos que análise estatística multi-variada das abundâncias relativas dos valores m/z obtidos a partir das varreduras médias de massa (VMM) da mistura complexa é um método mais rápido e potencialmente mais confiável de avaliação destas misturas. Foram preparadas 15 misturas modelo complexas contendo quantidades variadas de 10 constituintes diferentes. O perfil VMM e a composição química de cada mistura foram comparados uns aos outros utilizando análise de cluster hierárquica aglomerante e análise de componentes principais. Os resultados obtidos indicam fortemente que análise estatística multi-variada dos perfis VMM é uma ferramenta promissora, eficiente e confiável para analisar misturas voláteis complexas, em particular óleos essenciais.
منابع مشابه
Bioelectrical Impedance versus Body Mass Index for Predicting Body Composition Parameters in Sedentary Job Women
Objective: Nowadays the value of bioelectrical impedance analysis (BIA) in the estimation of body adiposity both on a clinical basis in the individual and epidemiologically in large populations is of great interest. The current study determine accuracy of BIA compared with body mass index (BMI) measurement for estimating body composition in a group of normal weight employee women with a sedenta...
متن کاملVolatile compounds analysis and antioxidant, antimicrobial and cytotoxic activities of Mindium laevigatum
Objective(s): Mindium laevigatum is an endemic plant of Iran and Turkey and is widely used as blood purifier, antiasthma and antidyspnea in traditional medicine. Chemical composition of volatile materials of the plant and its antioxidant, antimicrobial and cytotoxic activities were reported in this study. Materials and Methods: Simultaneous distillation-extraction (SDE) and GC-Mass-FID analysis...
متن کاملComparison of Total Fat, Percentage of Fat, Trunk Fat, Soft Lean and Mass Waist-Hip Ratio between Diabetic type II and Matched Non-Diabetic Iranians using Bioelectrical Impedance Analysis
Introduction: Research shows a relationship between diabetes (type II) and obesity. Bioelectrical Impedance Analysis (BIA) is a relatively new and approved method for the measurement of body composition. The aim of this study was to compare diabetic and non-diabetic adults on the basis of waist-hip ratio, total fat, percentage of fat, trunk fat, and soft lean mass. Methods: In this cross-sec...
متن کاملComparison of Body Composition among Newly Entered Medical and Nursing/Midwifery Students of Rafsanjan University of Medical Sciences
Background: It seems that weight gain and body composition changes occur during the first year of college . The aim of this study was the comparison of body composition among freshmen medical sciences students one term after entering Rafsanjan University of Medical Sciences , South East of Iran. Materials and Methods: All freshmen medicine (n = 73) and nursing- midwifery studen...
متن کاملExperimental Investigation in Pool Boiling Heat Transfer of Pure/Binary Mixtures and Heat Transfer Correlations
Nucleate pool boiling heat transfer coefficient have been experimentally measured on a horizontal rod heater for various liquid binary mixtures. Measurements are based on more than three hundred data points on a wide range of concentrations and heat fluxes. In this investigation, it has been confirmed that the heat transfer coefficient in boiling solutions are regularly less than those in p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2010