نتایج جستجو برای: dispersive solid phase extraction
تعداد نتایج: 916176 فیلتر نتایج به سال:
کاهو از سبزیهای بسیار مفید و موثری است که علاوه بر خواص غذایی ، مصرف درمانی نیز داشته و در میان سبزیها تاریخی کهن دارد. این محصول بصورت خام مصرف می شود و میزان مصرف سرانه آن در ایران 4/1 کیلوگرم در سال می باشد ، لذا کنترل میزان باقیمانده سم این محصول در بهبود ایمنی سبد غذایی جامعه موثر است. از سمومی که برای کاهو و دیگر سبزیجات برگی از طرف سازمان حفظ نباتات توصیه شده حشره کش دیازینون و دیکلروس ا...
A review of the many uses of matrix solid phase dispersion (MSPD) in the extraction and analysis of a variety of compounds from a range of samples is provided. Matrix solid phase dispersion (MSPD) has found particular application as a somewhat generic analytical process for the preparation, extraction and fractionation of solid, semi-solid and/or highly viscous biological samples. Its simplicit...
Background & Aim: Essential oils are isolated from different sections of plants such as flowers, seeds, leaves, stems and roots. Essential oils are applied extensively in producing of perfumes, cosmetics, foods, beverages and confectioneries and as ingredients of disinfectants and insecticides. Experimental: Essential oil are obtained by several isolation methods, such as hydrodistillation (HD...
Solid phase extraction (SPE) and supercritical fluid extraction (SFE) have become established in the field of analytical chemistry over the last five years. Both techniques are alternatives to classical analytical extraction methods used to separate analytes from solid and liquid matrices. SFE is an alternative to traditional liquid-solid extraction methods, the two most common being soxhlet an...
objective: Phenytoin is an anti-seizure medication used to treat epilepsy, as well as to control arrhythmias (irregular heartbeat) and to treat migraine headaches and nerve pain. It is recommended to determine the amount of this drug in the blood to control the seizure and prevent its toxicity. In the present study, a sensitive and simple procedure based on the dispersive solid phase extraction...
Abstract Dispersive-micro solid phase extraction (d-µSPE) has gained increasing attention due to its convenience, effectiveness, and flexibility for sorbent selection. Among a various selection of materials, magnetic carbon nanotubes (Mag-CNTs) is promising d-µSPE with excellent separation efficiency in addition high surface area adsorption capability. In this work, two different surface-modifi...
Ionic liquid-based dispersive liquid–liquid microextraction (IL– –DLLME) coupled with high performance liquid chromatography (HPLC) with UV detection was developed for the simultaneous extraction and determination of nickel, cobalt, copper and zinc ions. In the proposed approach, salophen (N,N'-bis(salicylidene)-1,2-phenylenediamine) was used as a chelating agent, the ionic liquid, 1-hexyl-3-me...
in this work, a procedure for preconcentration of silver using dispersive liquid–liquid microextraction with the reagent dithizone as complexing reagent was developed. at ph 2, silver ions are complexed with dithizone and extracted into the fine droplets formed when mixing carbon tetrachloride (extraction solvent), ethanol (disperser solvent) and the sample solution. after extraction, the phase...
Solid Phase Extraction and Solid Phase Microextraction in grape and wine volatile compounds analysis
The preconcentration of Hg through MDSPE and cold vapor (CV) resulted in an excellent LOD.
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