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The influence of both light and heat on the stability of nitrofurazone aqueous solution was studied. Results show that in either heating experiments or the exposure to light at high temperatures, the degradation rate obeyed zero-order kinetics. The total rate constant ktotal caused by both light and heat can be divided into two parts: ktotal =kdark klight, where kdark and klight are the degradation rate constants caused by heat and light, respectively. The klight can be expressed as klight=Alight*exp(-Ea,light/RT)*E, where E is the illuminance of light, and Alight and Ea,light both are experimental constants. The values of these kinetic parameters were determined based on the experiments in the dark and upon exposure to three different light sources. Results show that the values of Alight and Ea, light varied with the light source. To save time, labor, and drugs, exponential heating experiments were employed and compared with the isothermal experiments. Results indicated that kinetic parameters obtained by exponential heating experiments are comparable to those obtained by isothermal experiments either in the dark or upon exposure to light. 相似文献
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水杨酸络合物在分析上有用,对络合物形成的研究也有一定的意义,不过这一类络合物的络合反应还有一些问题未阐明,关于水杨酸铜络合物,文献上已有不少的报导,但意见不一致.A.K.Бабко根据Spacu等对晶体组成的研究结果,认为水溶液中只形成CuSal和CuSal_2~(2-)(H_2Sal代表水杨酸),并由光度法测得其逐级不稳定常数分别是10~(-6.3);Pecci等,Укше等对于该体系络合质点组成的看法与Бабко一致,他们测得的不稳定常数与Бабко的基本符合,只是由于Pecci用pH滴定法测得 相似文献
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流动注射协同增强化学发光免疫分析法的建立与评价 总被引:2,自引:0,他引:2
以兔IgG为模型 ,NaTPB与PPP协同增强的Luminol H2 O2 HRP混合液为发光体系 ,HRP标记抗体 ,建立了灵敏度高、特异性强、重现性好的流动注射协同增强化学发光免疫分析法。结果表明 :在 2~ 6 0 μg L范围内兔IgG量与发光强度有良好的线性关系 ,相关系数r=0 .994 1 (P <0 .0 1 ) ;绝对检测限为 0 .6 5fmol;方法精密度为 4 .72 %~ 9.31 % ;回收率为 92 .5 0 %~ 99.4 0 %。免疫柱可反复使用 2 0 0次以上。本法测定不同浓度兔IgG标准溶液的结果与RIA法的测定结果基本一致 相似文献
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