摘要
酚红(PR)、氯酚红(CPR)分别与盐酸利多卡因(LDCD作用,形成离子缔合物,溶液颜色发生明显改变,最大吸收波长分别为556B_Iil、572B_Iil,在对应波长处,盐酸利多卡因的浓度与溶液的增色程度呈良好线性关系,从而建立测定盐酸利多卡因的光度法.在PR-LDCI、CPR-I。DCI体系的最大吸收波长处,LDCI的浓度分别在2.10×10~2.23×10^-6mol·L^-1、2.53×10^-6-2.51×10^-6mol·L^-1范围内遵守比尔定律,表观摩尔吸光系数分别为1.30×10^4L·mol^-1·cm^-1、1.13×10^4L·mol^-1·cm^-1,检出限分别为8.62×10^-7mol·L^-1、9.71×10^-7mol·L^-1.方法具有较高的灵敏度和良好的选择性,用于实际药品、血浆及尿液中盐酸利多卡因的测定,结果满意.
Lidocaine hydrochloride(LDCI) reacts with phenol red (PR) or chlorophenol red(CPR) to form an ion-association complex, the colours of solutions change obviously, the maximum absorption wavelength at 556 nm (PR-LDCI system) and 572 nm (CPR-LDCI system), the adding colours intensity is also proportional to the concentration of lidocaine hydrochloride, to develop spectrophotometric method of determination of lidocaine hydrochloride. The concentration of lidocaine hydro- chloride in the range of 2.10× 10^-6-2.23× 10^-6 mol · L^-1 and 2.53× 10^-6 -2.51× 10^- 5 mol · L^-1 obeys Beer's law at the maximum absorption wavelength of PR-LDCI and CPR-LDCI system, the apparent molar absorptivity ranges from 1.30 × 10^4 L · mol^-1· cm^-1 to 1. 13× 10^4 L · mol^-1· cm^-1 , the detection limits are 8.62× 10^-7 mol · L^-1 and 9.71× 10 ^-7 mol · L^-1. The method has high sensitivity and fairly good selectivity. The method is applied to the determination of lidocaine hydrochloride in medicine samples and human serum and human urine, with satisfactory results.
出处
《河南师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2008年第1期85-88,共4页
Journal of Henan Normal University(Natural Science Edition)
基金
教育部春晖计划资助(z2005-1-55005)
第二批“重庆市高等学校优秀中青年骨干教师资助计划”[渝教人(2005)2号]长江师范学院科研(07Jkg50)资助
关键词
分光光度法
盐酸利多卡因
酚红
氯酚红
spectrophotometry
lidocaine hydrochloride
phenol red
chlorophenol red