基于鲁米诺 高碘酸钾后化学发光测定肾上腺素

基于肾上腺素在高碘酸钾-鲁米诺碱性体系中的后化学发光反应,结合流动注射技术,建立了测定肾上腺素的流动注射-化学发光(FI(CL)方法.该方法简单、快速、灵敏,线性范围为3.0×10-5～1.2×10-4 g/L(r=0.996 9),检出限为3.0×10-7 g/L(3σ).对5.0×10-5 g/L的肾上腺素标准溶液进行11次平行测定,相对标准偏差为2.0%.将其应用于肾上腺素注射液中肾上腺素含量的测定,结果令人满意.同时,还初步探讨了该化学发光反应的发光机制.     

反相流动注射化学发光法测定白藜芦醇

在氢氧化钠介质中,H2O2协同KIO4氧化鲁米诺产生强化学发光,白藜芦醇可抑制其化学发光强度,据此采用反相流动注射技术,建立了一种定白藜芦醇的化学发光新方法．在优化的实验条件下,该法测定白藜芦醇的检出限为27ng／L,线性范围为8．0×10^-8～7．0×10^-6g／L,对2．0μg／mL的白藜芦醇进行11次平行测定,其相对标准偏差为0．82％,用于实际样品中白藜芦醇的测定,结果令人满意．     

鲁米诺-高碘酸钠-没食子酸丙酯化学发光体系的研究

根据碱性介质中没食子酸丙酯对鲁米诺-高碘酸钠具有较强的增敏作用,建立了化学发光测定没食子酸丙酯的分析方法.结果表明,没食子酸丙酯在8.0× 10-7～1.0× 104 g/L范围内与化学发光强度存在线性关系(R2=0.998 2),对1.0×10-5 g/L没食子酸丙酯溶液测定11次,检出限达到6.4×10-7g/L,RSD为1.61％.该方法可用于食用调和油中没食子酸丙酯的快速测定.     

壳聚糖功能化银纳米催化H2O2氧化鲁米诺化学发光法测定抗坏血酸

根据抗坏血酸抑制壳聚糖功能化银纳米催化H2O2氧化鲁米诺化学发光体系,建立了一种测定抗坏血酸的化学发光方法.在优化的实验条件下,该法测定抗坏血酸的线性范围为8.0×10-8～1.0×10-5 mol/L,检出限为5.0×10-8 mol/L,对1.0×10-6 mol/L抗坏血酸进行11次平行测定,其相对标准偏差为4.2％.将本法用于制剂中抗坏血酸的测定,结果令人满意.     

过氧化氢-鲁米诺流动注射化学发光法测定山奈酚

在NaOH介质中,山奈酚对H2O2-luminol体系的化学发光有抑制作用,据此采用流动注射技术建立了测定山奈酚的化学发光新方法．在优化条件下,本法测定山奈酚的线性范围为2×10^-8～6×10^-6 g·mL^-1,检出限为1．8×10^-8 g·mL^-1,对1×10^-6 g·mL^-1山奈酚进行11次平行测定,其相对标准偏差为4．8％．研究了体系的化学发光光谱及紫外可见光谱特性,提出了发光反应可能的机理．将本法用于合成样品中山奈酚的测定,获得满意结果．     

负载型Co/SiO2催化鲁米诺化学发光体系测定抗坏血酸

在碱性介质中,负载型Co/SiO2对鲁米诺-过氧化氢体系有增敏作用,而抗坏血酸(Vc)对该发光体系有强烈的抑制作用,据此建立了基于流动注射技术测定Vc的化学发光新方法.在最优实验条件下,测定Vc的检出限为4.2×10-10g/mL,线性范围为4.0×10-9～1.0×10-7g/mL.将本法用于维生素C药片中Vc的测定,并与药典法比较,结果令人满意.     

鲁米诺化学发光测定精胺

铜与精胺形成的1∶1不饱和配合物对Luminol-H2O2化学发光体系有强烈的催化活性,据此建立了简便、灵敏的测定精胺的化学发光新方法,线性范围为10-7～10-5mol/L,检测限为4×10-9mol/L,相对标准偏差为5 55%。     

流动注射钴离子催化化学发光法测定环境水体中痕量2-氯苯酚

在弱碱性介质中,过氧化氢能使发光试剂鲁米诺产生化学发光,Co2+对该化学发光体系具有很好的催化作用,2-氯苯酚的添加能增强该化学发光反应的发光信号,建立了测定2-氯苯酚的流动注射化学发光分析法。结果表明,2-氯苯酚产生的相对化学发光信号强度与其浓度在1.0×10-7~4.0×10-5 mol/L范围内呈线性关系,方法的检出限(3S/N)为5.0×10-8 mol/L。线性方程为y=1 492.9x-1 292.9,R2=0.990 6,对浓度为4.0×10-6 mol/L的2-氯苯酚进行11次平行测定,相对标准偏差为2.98%。     

Evaluation of the ocular penetration of topical alpha-luminol (Galavit®/GVT®)

Purpose Oxidative stress plays a major role in the pathogenesis of many neurodegenerative diseases. It has also been implicated as part of the pathogenic mechanisms in the development of glaucoma. Alpha‐luminol has shown profound anti‐inflammatory and antioxidant effects in both experimental animal and human clinical studies. The purpose of this pilot study was to investigate for the first time the ocular penetration of topical alpha‐luminol. Methods Nine animals were divided into three treated groups (three animals each; one drop OU/n = 18), each group receiving a different concentration of the eyedrop (0.5%, 1.5%, 2.5%). Aqueous humor and peripheral blood samples were obtained from each rabbit at three different timepoints (20 min, 4 h and 12 h). Samples were analyzed by means of high performance liquid chromatography and mass spectrometry; median values were compared. Results Alpha‐luminol was found in the aqueous humor in all treated groups at all timepoints. At the 2nd and 3rd timepoints (4 h and 12 h), aqueous humor levels decreased significantly (P < 0.05) for two of the three dosages tested and it was not detectable in some eyes. The highest aqueous humor concentration of the drug was 272 ng/mL after 20 min (0.0217% of one drop, 2.5% group). Alpha‐luminol was found in the vitreous in two animals, one in the 1.5% and another in the 2.5% group (16.4 and 21.5 ng/mL, respectively), at 12 h. Conclusions Topically administered alpha‐luminol readily penetrates into the anterior chamber and can penetrate into the vitreous chamber. Further investigation is warranted to better understand the intraocular pharmacokinetics of alpha‐luminol.     

Se-KI-LUMINO1化学发光体系的研究

本文通过对酸性溶液中Se(Ⅳ)可氧化I~-生成I_2,而在碱性溶液中I_2又可氧化Luminol产生化学发光的研究,确定了Se(Ⅳ)-KI-Luminol的化学发光体系,建立了硒的化学发光分析方法。该方法操作简便、快速,检出限为8×10~(-3)μg/ml,线性范围0.04—6μg/ml,相对标准偏差为5％。