Abstract
A lab-on-a-tip (LOT) has been constructed as a sensing platform for the detection of lead using a disposable pipette tip. The LOT has been constructed with optical fiber spectroscopy where the inside wall of a pipette tip is modified with a polymeric inclusion membrane (PIM) immobilized with dithizone as a chemical sensor for Pb(II) in herbal samples. Under optimal conditions, the LOT determined Pb(II) across a linear concentration range from 1.9 to 20 mg/L with a detection limit of 0.621 mg/L. The analysis of samples shows good agreement with the flame atomic absorption spectroscopy (FAAS).
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