A static headspace method of sampling coupled to a conventional instrumental analytical probe, gas chromatography mass spectrometry (GCMS), has been applied examine the volatile fraction above leaf tissue from Palicourea marcgravii, toxic Brazilian plant that causes sudden death in livestock, and two other surrogate species (Lippia alba Plectranthus spp.). 
 The unusual total ion chromatog...

A 76-year-old woman was admitted for cardiac decompensation, hypertension, and renal failure. To explore her chronic hypertension, urinary fractionated metanephrines were quantified. Fig. 1A shows the chromatogram of the patient’s urine, and Fig. 1B shows the chromatogram of a calibration standard. A very large methoxytyramine peak was observed (Fig. 1A, black arrow). The peak signal was satura...

\ Abstract: India is an agriculture country; where in about 70% of the population depends on agriculture. also Indian agriculture occupies an eminent position in global cultivation of rice, wheat, sugarcane, pulses and vegetables. Soil testing provides the basic information for the farmer to decide, the suitable crop, content of minerals in the soil, extent of fertilizer to be used, etc. The cu...

It remains a challenge to establish new monographs for herbal drugs derived from multiple botanical sources. Specifically, the difficulty involves discriminating and quantifying these herbs with components whose levels vary markedly among different samples. Using Uncaria stem with hooks as an example, a characteristic chromatogram was proposed to discriminate its five botanical origins and to q...

The separation technologies of 3D chromatograms have been researched for a long time to obtain spectra and chromatogram peaks for individual compounds. However, before applying most of the current methods, the number of compounds must be known in advance. Independent Component Analysis (ICA) is applied to separate 3D chromatograms without knowing the compounds' number in advance, but the existe...

A completely validated method based on HPLC coupled with photodiode array detector (HPLC-UV) was described for evaluating and controlling quality of Yin Chen Hao Tang extract (YCHTE). First, HPLC-UV fingerprint chromatogram of YCHTE was established for preliminarily elucidating amount and chromatographic trajectory of chemical constituents in YCHTE. Second, for the first time, five mainly bioac...

The problem of plastic waste is very flourished in the current era modern life. In this study, a three-condenser pyrolysis reactor was applied to obtain fuels form oil#1, oil#2, and oil#3 from waste. Gas Chromatography-Mass Spectroscopy (GC-MS) technique carried out analyze fuel for profiling study. Characterization using GC-MS indicated domination hydrocarbon compounds found oil#1. existence o...

Background and Objectives: The addition of plasticizers (mainly phthalates and adipates) makes plastic flexible and popular for packaging, storing and preserving food, water, and so on. The most widely used plasticizer in food contact applications is di-ethylhexyl phthalate (DEHP) though being suspected to have carcinogenic and estrogenic properties. The aim of this study is application of magn...