Determination of Vitamin B12 and cobalt in egg yolk using vortex assisted switchable solvent based liquid phase microextraction prior to slotted quartz tube flame atomic absorption spectrometry

Cobalt separation from water and food samples based on penicillamine ionic liquid and dispersive liquid-liquid microextraction before determination by AT-FAAS

“…Cobalt as an essential metal exists in the human body and the maximum amount of it generally concentrated in the liver. Cobalt in eggs has biological role in vitamin B12 and named cyanocobalamin [9]. It uses in structure of vitamin B 12 and produce the red blood cells in bones and define from anemia in body [9].…”

“…Cobalt in eggs has biological role in vitamin B12 and named cyanocobalamin [9]. It uses in structure of vitamin B 12 and produce the red blood cells in bones and define from anemia in body [9]. Cobalt toxicity cause several health problems such as cardiomyopathy, nerve/thyroid problems, hearing and visual impairment, neuropathy, tinnitus and glomerulonephritis [10,11].…”

A comprehensive review on recent developments and future perspectives of switchable solvents and their applications in sample preparation techniques

“…In the case of amine-based SSs, CO 2 has been mostly used as a switching-on trigger for phase transition from hydrophobic to hydrophilic, as shown in Table 1, while on the other side triggers for fatty acid-based SSs are sodium bicarbonate along with NaOH. [122][123][124]126,127,130,131,[152][153][154][155] 5.10.2. Selection of switching-off triggers (hydrophilic to hydrophobic).…”

A Fluorescent Probe Based on Polyethyleneimine Protected Copper Nanoclusters for the Assay of Tetracycline Hydrochloride and Vitamin B12

“…Vitamin B12 (VB12) also called cyanocobalamin or cobalamin, is one of the essential micronutrients for humans and related to carbohydrate metabolism, nerve cell maintenance, DNA synthesis and repair, and the metabolism of enzyme [8,9] . Nevertheless, VB12 cannot be synthesized by the human body [10,11] . For human, the daily requirement of VB12 is one to two microgramme [7] .…”

“…For human, the daily requirement of VB12 is one to two microgramme [7] . Lacking of VB12 can result in some diseases, such as neurological abnormalities, weight loss, nausea, pernicious anemia, stroke, cognitive impairment, osteoporosis, or physical dysfunction [11] . Contrastly, excess VB12 can also easily induce some diseases, like abnormal bone marrow hyperplasia and kidney failure [14] .…”