Drying of organic solvents: quantitative evaluation of the efficiency of several desiccants.

USE OF ORGANIC SOLVENTS FOR THE ENHANCEMENT AND LIFETIME INCREASING OF LUMINESCENCE IN FLUORIMETRIC APPLICATION BY FLUORESCAMINE

In this study, the fluorogenic efficiency of fluorescamine for spectrofluorimetric analysis of primary amines was investigated. Different mixtures of dichloromethane and other organic solvents were used for evaluation of fluorescence stability and intensity of fluorescamine derivative (Pyrrolinone). Solvents such as acetonitrile (ACN), tetrahydrofuran (THF) and dioxane increase stability an...

Evaluation of factors affecting on lipid extraction for recovery of fatty acids from Nannochloropsis oculata micro-algae to biodiesel production

Background: This study aimed at determining the appropriate method for dewatering and drying biomass and selecting a suitable organic solvent for lipid extraction. Methods: Nannochloropsis Oculata was cultured in Gillard F/2 medium and after reaching the end of the stationary growth phase, algal biomass was separated from aqueous by centrifuge and dried through three methods: Oven, Air-dried an...

Feasibility evaluation of trace amount of zinc in urine samples using atomic absorption solidified floating organic drop micro-extraction technique

Background: The present study was carried out with the aim of extracting trace amounts of zinc in urine samples with ultrasound-assisted emulsification solidified floating organic drop micro-extraction (USAE-SFODME) method by flame atomic absorption spectrometry (FAAS). The efficiency was investigated using the solvent extraction volume, extraction pH, time sonication and temperature extraction...

Qualitative and Quantitative Evaluation of Essential Oil of Catnip (Nepeta cataria L.) Under Different Drying Conditions

Background: Drying is the most common way to preserve quality of aromatic and medicinal plants. Chosen drying methods can affect on the essential oil content and composition of medicinal plants. Objective: This study aimed to assess the changes in essential oil constitutes of catnip aerial part under various drying methods. Methods: The experiment was performed as the randomized complete ...

Desiccant efficiency in solvent drying. 3. Dipolar aprotic solvents.