【摘要】 研究了胡椒碱在磷酸三丁酯（ＴＢＰ）修饰玻碳电极上的电化学行为。在ｐＨ４．６的Ｂｒｉｔｏｎ－Ｒｏｂｉｓｏｎ缓冲溶液中，胡椒碱在－１．４０Ｖ（ｖｓ．ＳＣＥ）处有一灵敏的极谱还原峰。吸附溶出峰电流与胡椒碱的量浓度在７．４０×１０－９～２．２２×１０－７ｍｏｌ／Ｌ范围内有良好的线性关系。富集６ｍｉｎ检出限为２．２２×１０－１１ｍｏｌ／Ｌ。已用于天然胡椒中胡椒碱的测定。更多还原

【Abstract】 he voltammetriy of piperine at TBP chemically modified electrode has been studied. A welldefined derivative peak is obtained at 1.40 V(vs.SCE) in Britton-Robinson buffer solution(pH4.6). The peak current is proportional to the concentration of piperine in the range of 7.410-92.210-7mol/L. The detection limit has been estimated as 2.210-11mol/L with 6 min accumulation. The method has been applied to determine piperine in natural pepper with satisfactory results.更多还原