Abstract：In a hydrochloric acid medium,trace amounts of nitrite ion showed a strong catalytic effect on the oxidation reaction between neutral red and potassium bromate.Furthermore,in an ammoniacal buffer solution,neutral red gave a sensitive derivative voltaic peak at E=-0.69V（vs.SCE）.It was found that the peak current difference △I between the values of catalytic reaction（I）and non-catalytic reaction（I0）kept a linear relationship with concentration of nitrite ion in the range of 1.2×10-7～5.0×10-4μg·mL-1.Based on these phenomenon,a sensitive method of determination of trace amounts of nitrite ion was established.The detection limit of the method was found to be 5.4×10-8μg·mL-1.Satisfactory results were obtained in its application to the determination of nitrite in meat.
2007, Vol. 21 
