流动注射化学发光法检测食品中SO2含量的研究

目的:建立一种食品中SO2的化学发光快速检测法?方法:利用SO2定量的与酸性高锰酸钾反应,从而减弱高锰酸钾-间苯二酚的化学发光,其减弱值与被检物浓度有关?结果:在最优化条件下,SO2浓度在0.04~40.00 mg/L范围内与发光强度减弱值呈较好的线性关系?方法的检测限为0.03 mg/L (S/N=3)?结论:该方法可用于食品中SO2分析?     

盐酸异丙嗪注射液的流动注射分析测定

采用流动注射分析仪，根据盐酸异丙嗪可与钯离子发生配位显色反应的原理，测定盐酸异丙嗪注射液的含量。线性范围为０～１３０μｇ／ｍｌ，变异系数小于１．０％。     

盐酸氟奋乃静片含量均匀度的流动注射分析

基于盐酸氟奋乃静在一定ｐＨ值下与氯化钯反应，生成红色配位产物，于４８５ｎｍ处出现最大吸收，可籍以测定含量。线性范围０￣８０μｇ／ｍｌ，ＲＳＤ约为１％。     

流动注射-化学发光检测利福平

目的:建立一种流动注射-化学发光测定利福平的快速、灵敏新方法。方法:碱性条件下,利福平对luminol-KIO4化学发光体系有抑制作用,结合流动注射技术,建立了流动注射-化学发光检测利福平的新方法。结果:在优化条件下,利福平的线性范围是7.0×10-9～6.0×10-7 mol.L-1,检出限达3.2×10-9 mol.L-1。对3.0×10-8 mol.L-1和2.0×10-7mol.L-1利福平分别进行11次测定,相对标准偏差分别为0.8%和1.6%。分析速度为128个样品/时。将提出的新方法成功应用于利福平滴眼液和利福平胶囊中利福平含量的测定。结论:本方法操作简单快速,适合于利福平的分析。     

铽敏化化学发光测定盐酸芦氟沙星

目的研究Tb(III)-RFX-Ce⁴⁺-Na₂SO₃体系的化学发光机理,建立测定胶囊和人体尿样中芦氟沙星含量的新方法。方法将芦氟沙星注入到Na₂SO₃载液中,按先后顺序与Tb³⁺和Ce⁴⁺溶液混合,用化学发光检测器测量体系的相对发光强度。结果芦氟沙星的浓度在2.0×10^-9～1.0×10^-6 mol·L^-1,与化学发光强度呈良好的线性关系;检出限为3.8×10^-10 mol·L^-1。结论为芦氟沙星药代动力学研究和临床治疗提供一种高灵敏度、高选择性、简单快速的新方法。     

Recent developments in analytical determination of furosemide

Furosemide (FUR), a drug that promotes urine excretion, is used in the pharmacotherapy of various diseases and is considered as a doping agent in sports. FUR is a powerful diuretic (water pill). This medicine is used to treat excessive fluid accumulation and swelling (edema) of the body caused by heart failure, cirrhosis, chronic kidney failure, and nephrotic syndrome. Owing to its extensive use as a powerful diuretic, FUR has long attracted the attention of many analysts. A variety of analytical methods have been proposed for the determination of FUR in biological fluids and pharmaceutical samples. The revision includes the most relevant analytical methodologies used in its determination from the nineties decade at present.     

Role of plasma protein and low-molecular weight substances in the change of hydroxyl radical scavenging activity in hemodialysis patients

While it is well known that hemodialysis (HD) patients with end stage renal failure are exposed to high oxidative stress, there is not a general opinion regarding whether antioxidant activity is high or low in these patients. We evaluated the variation of plasma hydroxyl radical scavenging activity (p-HRSA) by a single-session of HD in 69 patients by using a new system, reactive flow-injection electron spin resonance. And then comparing p-HRSA with their biochemical parameters, we tried to elucidate what components affected p-HRSA in the HD patients. The average of p-HRSA significantly increased after HD and the variation of p-HRSA by HD was correlated with that of plasma total protein (TP). In 5 patients however, their p-HRSA decreased after HD, in spite of increasing TP. In pre-HD, the p-HRSA values and hydroxyl radical scavenging activity of low-molecular weight fraction of plasma were significantly higher in these 5 patients than in patients whose p-HRSA increased after HD. These 5 patients were in an inflammatory state. These findings suggest that p-HRSA is mainly affected by TP, but caution should be exercised in patients who have high p-HRSA before HD and whose p-HRSA does not increase after HD.     

罗通定片中延胡索乙素的化学发光法测定

采用流动注射技术,建立了KMnO4-Na2SO3-延胡索乙素化学发光体系测定罗通定片中延胡索乙素的含量.线性范围为2.0×10-8～8.0×10-6g/ml,检测限为6×10-9g/ml.     

流动注射化学发光法测定吩噻嗪类药物的研究

目的:建立快速测定吩噻嗪类药物的化学发光新方法。方法:在盐酸介质中,吩噻嗪类药物能被硫酸铈氧化生成发光物质砜,从而产生化学发光。基于此,建立了吩噻嗪类药物的流动注射化学发光分析方法。结果:在优化的实验条件下,不用任何增敏剂,盐酸氯丙嗪、盐酸异丙嗪在1.0×10~(-7)～1.0×10~(-5)g·mL~(-1),奋乃静在1.0×10~(-7)～1.0×10~(-4)g·mL~(-1)范围内与化学发光强度呈良好的线性关系;检出限(3σ)分别为7.0×10~(-8)g·mL~(-1),5.0×10~(-8)g·mL~(-1),2.0×10~(-1)g·mL~(-1)。结论:本方法简便、快速、准确,灵敏度高、线性范围宽,该法应用于相应注射剂和片剂分析,结果令人满意。     

鲁米诺—高碘酸钾化学发光法测定盐酸阿朴吗啡

目的:在碱性条件下盐酸阿朴吗啡(Apomorphini Hydrochloridum)对luminol—KIO4化学发光体系具有很强的增敏作用,据此建立了流动注射化学发光法测定盐酸阿朴吗啡新方法。方法:线性范围为5.5×10-3～0.1 mg.L-1,检出限为4.4×10-3mg.L-1,RSD(n=10,c=0.02 mg.L-1)为2.6%,结果:已用于阿朴吗啡在尿样和血样中含量的测定,尿样中的加标回收率为97.32%～104.69%,血样中加标回收率为106.30%～110.57%。结论:由于其易见光分解,需使用合理的前处理手段。