本文提出了用于测定色氨酸的土豆汁修饰碳糊电极,该电极选择性好,能有效地消除酪氨酸的干扰,在pH=7.4的NaH_2PO_4-NaOH生理缓冲液中,电极响应与色氨酸在9.8×10~(-6～9.8×10~(-5)mol/L的浓度范围内呈线性关系,最低检出限是1.5×10~(-6)mol/L。并详细讨论了电极抗干扰能力与测定条件的关系。用该电极测定了实际样品氨基酸注射液中色氨酸的含量,结果与标准值吻合。 In this paper, a potato juice modified carbon paste electrode for the determination of tryptophan is proposed. The electrode has good selectivity and can effectively eliminate the interference of tyrosine. In the NaH 2 PO 4-NaOH physiological buffer solution with pH = 7.4, the electrode response and color The linear relationship was found between the concentrations of 9.8 × 10 ~ (-6 ~ 9.8 × 10 ~ (-5) mol / L and the minimum detection limit was 1.5 × 10 ~ (-6) mol / L. The relationship between electrode anti-interference ability and measurement conditions was determined.The content of tryptophan in the amino acid injection of the actual sample was measured by the electrode, and the result was consistent with the standard value.