Experimental studies for the sequential detection of lead (II) and arginine in rice grains

In this study, an application of bromopyrogallol red for the sequential determination of lead(II) and arginine is reported. Bromopyrogallol red acts as a colorimetric sensor with a very simple, effective and selective method for the detection of lead(II) in a wide range of cations. The formed complex can act as an amino acid receptor for the selective detection of arginine in a wide range of amino acids and cations by colorimetric method. With the gradual increase of lead(II), the color change of bromopyrogallol red was carried out from purple to pink and simultaneously caused a decrease in the absorption at a wavelength of 556 nm. In the next step, with the increase of arginine, a color change from pink to purple was observed and an increase in the absorption at 545 nm was observed. The linear range for lead(II) and arginine was 1221-31241 μM and 11252-112201 μM, respectively, and their correlation coefficients were 122233 and 122243, respectively. Finally, it was determined that this method is capable of identifying lead(II) and arginine in rice grain samples (Indian, Pakistani, and Iranian).

Experimental studies for the sequential detection of lead (II) and arginine in rice grains Keywords:

Experimental studies , metal complexes , lead , arginine , real samples , rice