Acta Phys. -Chim. Sin. ›› 1986, Vol. 2 ›› Issue (06): 549-553.doi: 10.3866/PKU.WHXB19860611
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Li Nanqiang; Min Jing
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Abstract: In 0.2 mol L~(-1)acetate buffer Solution, at pH 4.2—4.5, carminic acid exhibits a reversible adsorptive wave in single-sweep polarogram. The electrode reaction is(H_2L~(-))_(ads)+2H~++2e<=>(H_2L′~-)_(ads) H_2L~- and H_2L′~(-) are the anthraqluinone and dihydroanthraquinone ions of carminic acid respectively. On the surface of mercury electrode,the adsorption of carminic acid obeys Frumkin adsorption isotherm The adsorption coefficient(β=7.0×10~6), the interaction factor(v=-0.92), the amount of saturated adsorption (Γ_s=1.39×10~(-10) mol cm~(-2) and t...
Li Nanqiang; Min Jing. A POLAROGRAPHIC STUDY OF CARMINIC ACID[J].Acta Phys. -Chim. Sin., 1986, 2(06): 549-553.
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URL: http://www.whxb.pku.edu.cn/EN/10.3866/PKU.WHXB19860611
http://www.whxb.pku.edu.cn/EN/Y1986/V2/I06/549
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