stachys lavandulifolia vahl is an herbaceous wild plant native to iran which is traditionally used in iranian folk medicine as a mild sedative tea for reducing anxiety and for treatment of gastrointestinal disorders. our previous study on ethyl acetate extract of s. lavandulifolia proved anti-anxiolytic activity and so the present study was designed to determine chemical components of this biol...

background aflatoxins are a group of very toxic compounds produced by a fungal species and are found in food products. aflatoxin m1 (afm1) is a type found in dairy products and resistant to pasteurization. afm1 can adversely affect hepatocytes in human and leading to various liver diseases. thus, it is essential to examine raw milk for the presence of afm1. conclusions according to the results ...

A simple and efficient method, ionic liquid-based dispersive liquid-liquid microextraction combined with high-performance liquid chromatography-ultraviolet detection (HPLC-UV), has been applied for the extraction and determination of some antioxidants (Irganox 1010, Irganox 1076 and Irgafos 168) in water samples. The microextraction efficiency factors were investigated and optimized: 1-hexyl-3-...

dispersive liquid-liquid microextraction method (dllme) combined with high-performance liquid chromatography-ultraviolet detection (hplc-uv) was used to determine thiamine (b1), nicotinamide (b3) and pyridoxine (b6) in sour cherry juice. this method was rapid, simple and sensitive. separation was accomplished using a c18 column. the optimum chromatographic conditions were found to be: mobile ph...

An accurate and simple analysis method by high-performance liquid chromatography-mass spectrometry for the riboflavin crude product of semisynthesis is established in this study. In this method, a C(18) column is used, and the mobile phase is methanol-water. Under the optimal analysis conditions established in this study, all components in the riboflavin crude product are well separated and ide...

The quantitative parameters and method performance for a normal-phase HPLC separation of flavanols and procyanidins in chocolate and cocoa-containing food products were optimized and assessed. Single laboratory method performance was examined over three months using three separate secondary standards. RSD(r) ranged from 1.9%, 4.5% to 9.0% for cocoa powder, liquor and chocolate samples containin...

The rates at which biological interactions occur can provide important information on the mechanism and behavior of such processes in living systems. This paper will discuss how affinity chromatography can be used as a tool to examine the kinetics of biological interactions. This approach, referred to here as biointeraction chromatography, uses a column with an immobilized binding agent to exam...

BACKGROUND/AIM Saliva is a body fluid which, like serum, can be used for determination of concentrations of certain drugs, both in pharmacotherapy as well as in acute poisonings. The aim of this study was to determine carbamazepine concentrations in both saliva and serum in acute poisoning in order to show if there is a correlation between the obtained values, as well as to monitor toxicokineti...

INTRODUCTION Acrylamide, produced during thermal processing of carbohydrate-rich foods, is classified as "probably carcinogenic to humans" by the International Agency for Research on Cancer. OBJECTIVE The aim of this study was to determine acrylamide levels in biscuits and breakfast cereals considering the widespread use of these products for all ages. METHOD Acrylamide determination was ca...