共查询到18条相似文献,搜索用时 78 毫秒
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在甲醛存在下,KMnO4与茚三酮能够发生化学发光反应,产生很强的化学发光.据此采用流动注射技术,建立了一种利用KMnO4-甲醛-茚三酮化学发光体系测定茚三酮的方法.方法的检出限为3×10-8 g/mL;相对标准偏差为1.1%(4.0×10-6g/mL茚三酮,n=11);线性范围为1.0×10-7~2.0×10-4 g/mL.本法已用于样品中茚三酮的测定. 相似文献
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高锰酸钾-甲醛-无机还原剂化学发光体系 总被引:10,自引:0,他引:10
在甲醛存在下,高锰酸钾与无机还原剂Fe(Ⅱ),S^2-,I^-,Cu(Ⅰ)等能够发生化学发光反应,产生很强的化学发光,据此利用流动注射技术研究了这些化学发光反应。考察了这些反应应用于铁,硫、碘、铜等元素化学发光测定的可行性,并探讨了反应机理。 相似文献
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A critical and comprehensive review of acidic potassium permanganate chemiluminescence is presented. This includes discussion on reaction conditions, the influence of enhancers such as polyphosphates, formaldehyde and sulfite, the relationship between analyte structure and chemiluminescence intensity, and the application of this chemistry to determine a wide variety of compounds, such as pharmaceuticals, biomolecules, antioxidants, illicit drugs, pesticides and pollutants. Previous proposals for the nature of the emitting species are re-evaluated in light of recent evidence. 相似文献
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Calcein was found to be able to use as chemiluminescence reagent and post-chemiluminescence was observed when fenfluramine was injected into the mixture after the CL reaction of calcein–potassium permanganate. Based on this phenomenon, a flow injection CL method was established for the determination of fenfluramine. The possible CL mechanism was proposed. The CL intensity was correlated linearly with the concentration of fenfluramine over the range of 1.0 × 10−7 to 6.0 × 10−6 g mL−1 and the detection limit was 6 × 10−8 g mL−1. The relative standard deviation was 2.2% for 5.0 × 10−7 g mL−1 fenfluramine (n = 11). This method was applied to the determination of fenfluramine in weight-reducing tonic successfully. 相似文献
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流动注射化学发光法测定青霉素G钾 总被引:1,自引:0,他引:1
在甲醛的存在下,酸性KMnO4与青霉素G钾能够产生很强的化学发光,从而建立了KMnO4-甲醛-青霉素G钾化学发光体系来测定青霉素G钾.青霉素G钾的测定线性范围为2.0×10-7~1.0×10-5 g/mL,方法的检出限为1.4×10-7 g/mL,对4.0×10-7 g/mL的青霉素G钾进行11次平行测定,相对标准偏差为1.0%,用此法测定青霉素G钾取得了较好的结果. 相似文献
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流动注射化学发光法测定氯化血红素 总被引:2,自引:0,他引:2
在甲醛存在的条件下,在酸性溶液中KMnO4与氯化血红素能够发生化学发光反应,产生很强的化学发光。据此采用流动注射技术,建立了一种利用KMnO4-甲醛-氯化血红素化学发光体系测定氯化血红素的化学发光分析法。方法的检出限为6×10-8g/mL;相对标准偏差为1.8%(2.0×10-6g/mL氯化血红素,n=11);线性范围为2.0×10-7~8.0×10-6g/mL。本法用于新鲜鸡血中氯化血红素的测定,结果与标准方法测得值一致。并对化学发光反应的机理进行了探讨。 相似文献
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We review the analytical applications of acidic potassium permanganate chemiluminescence published since our previous comprehensive review in mid-2007 to early 2013. This includes a critical evaluation of evidence for the emitting species, the influence of additives such as polyphosphates, formaldehyde, sulfite, thiosulfate, lanthanide complexes and nanoparticles, the development of a generalized reaction mechanism, and the use of this chemistry in pharmaceutical, clinical, forensic, food science, agricultural and environmental applications. 相似文献
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Based on the sensitizing effect of formic acid on the chemiluminescence (CL) reaction of polyhydroxylbenzenes with acidified potassium permanganate and the combination technique of high-performance liquid chromatography (HPLC), a sensitive, selective and simple post-column CL detection method for simultaneously determining catechol, resorcinol, hydroquinone and 1,2,4-benzenetriol is described. The optimal conditions for the CL detection and HPLC separation were carried out. The linear ranges were: 6.0 × 10−3-1.5 mg/L for hydroquinone, 8.0 × 10−3-1.5 mg/L for 1,2,4-benzenetriol, 1.0 × 10−2-2.0 mg/L for resorcinol and 1.0 × 10−2-2.5 mg/L for catechol, respectively. The detection limits are: 3.2 × 10−3 mg/L for hydroquinone, 3.9 × 10−3 mg/L for 1,2,4-benzenetriol, 4.7 × 10−3 mg/L for resorcinol and 5.2 × 10−3 mg/L for catechol, respectively. Combining with solid phase extraction, the proposed method has been successfully applied to the determination of the polyhydroxylbenzenes in river water. The recoveries for three benzentriols were 92.1-95.4% and 82.0% for 1,2,4-benzenetriol, respectively. 相似文献
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基于在甲醛存在下 ,水杨酸与KMnO4在酸性介质中直接化学发光反应 ,建立了测定水杨酸的流动注射化学发光的方法 ,该法测定水杨酸的线性范围为5 .0× 1 0 -7~ 1 .0× 1 0 -3 mol L ,检出限为 3.0× 1 0 -7mol L ,相对标准偏差为 2 0 %(水杨酸 5 .0× 1 0 -5mol L ,n =1 1 )。该法已应用于脚癣药水中水杨酸的测定。 相似文献