Fig. 3From: RETRACTED ARTICLE: Citrate stabilized Fe3O4/DMG modified carbon paste electrode for determination of octamethylcyclotetrasiloxane in blood plasma and urine samples of cement factory workersDifferential pulse voltammograms of a Ni(II) at Cit-Fe3O4-DMG-CPE; b Ni(II) and 300 ng/mL D4 at Cit-Fe3O4-DMG-CPE. Experimental conditions: pH 5, scan rate 100 mV s−1Back to article page