Accurate and sensitive determination of cobalt in urine samples using deep eutectic solvent-assisted magnetic colloidal gel-based dispersive solid phase extraction prior to slotted quartz tube equipped flame atomic absorption spectrometry

Determination of cobalt in chamomile tea samples at trace levels by flame atomic absorption spectrophotometry after poly(vinyl alcohol)-magnetic hydrogel based dispersive solid phase extraction

“…1 Cobalt, one of these metals, is an essential element that has various functions in the human body such as in the blood formation process, stimulation of hemoglobin synthesis, and functioning of various enzymes, vitamins and hormones. 2 This metal has a positive effect on vitamins such as vitamin B 12 and 1.0 mg is sufficient for a normal body. In addition, a Co-60 gamma-ray source with radioactive properties has been used as a tracer and radio therapeutic agent.…”