Background Vitamin E deficiencies are prevalent around the world and have become one of
the major public health issues. It is necessary to determine their levels in human serum for …

The determination of fat-soluble vitamins and carotenoids in human serum provides reliable
information for diagnosing malnutrition and for establishing appropriate intervention …

Developing a simple and fast method for quantification of vitamins in complex matrixes is
one of the important issues in quality control of foods such as milk. In this study, after …

Capillary liquid chromatography (LC) is used for the determination of tocopherols and
tocotrienols in cosmetic products. Dispersive liquid–liquid microextraction (DLLME) allows …

In this study, a novel, inexpensive, sensitive and selective analytical method that combines
ion pair hollow fiber liquid–liquid–liquid microextraction (IP-HF-LLLME) with capillary …

In this study, ultrasound-assisted emulsification microextraction with solidification of a
sedimentary drop of ionic liquid (USAEME-SSIL) was used to extract fat-soluble vitamins …

A green and inexpensive pretreatment known as dispersive liquid–liquid microextraction
(DLLME) was developed in this assay coupled with the LC–MS/MS method for routine …

The reliability of hollow fiber-based on using two immiscible organic solvents in the lumen
and wall pores of hollow fiber was evaluated for extraction and preconcentration of trace …

Microemulsion eluents have been found to have excellent potential uses in high-
performance liquid chromatography (HPLC). Here, a novel, environmentally benign and …

A high‐throughput miniaturized liquid–liquid extraction procedure followed by a simple ultra‐
high performance liquid chromatography method coupled with fluorescence detection for …