The article studied the resonance light scattering of protein red alizarin with the simple fluorescence spectrophotometer first.In Britton Robinson butter of 4.10,the red alizarin combined with proteins by intermolecu...The article studied the resonance light scattering of protein red alizarin with the simple fluorescence spectrophotometer first.In Britton Robinson butter of 4.10,the red alizarin combined with proteins by intermolecular forces to form complexes,causing an enhance of resonance light scattering(RLS) at maximum wavelength of about 360nm.Based on the enhancement of resonance light scattering a novel method for the determination of proteins using red alizarin was developed.Though it affected by the limit of the filter of spectrophotometer the experiment used the wavelength of incident light doesn’t lie in the maximum wavelength,the method has better linear range within 0～10.0μg/ml,determination limits being 0.04μg/ml.The method had been used to determine total proteins in human serum samples and with accuracy and torelant to many foreign substance.展开更多
In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the d...In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the determination of fluorine. Fluorine has been absorbed in KOH solution after steam distillation. The optimum condition is 1.2mmol/L of Na 2CO 3 in eluting. It shows that the analytical result by LPIC is as satisfactory as that by (Ac-La) 2F 2 spectrophotometric mthods.展开更多
Atom economy of the process of rare earth separation by using fluoride was discussed in this paper.We compared the atomic economic characters between the processes of vitriolic composite salt and fluoride,then stated ...Atom economy of the process of rare earth separation by using fluoride was discussed in this paper.We compared the atomic economic characters between the processes of vitriolic composite salt and fluoride,then stated that changing present rare earth producing process by green chemistry and technology transformation was the best way to make our rare earth manufacture prosperous.展开更多
Orthogonal design methocl,based on the formation of a yellow complex of lead(Ⅱ) with α、β、γ、δ Trtra(p sulfopheny 1) Porphine in the pH10.2 H 3BO 3 NaOH buffer selution,has been proposed.The maximum absorption w...Orthogonal design methocl,based on the formation of a yellow complex of lead(Ⅱ) with α、β、γ、δ Trtra(p sulfopheny 1) Porphine in the pH10.2 H 3BO 3 NaOH buffer selution,has been proposed.The maximum absorption wavelength (λ max ) is 464nm.The molar absorption coefficient(ε max ) is 2.5×10 5L·mol -1 ·cm -1 .The detection limit is 4μg·L -1 .Beer’s law is applicable in the rang of 0.1～10.4μg/25ml for lead.The method has been used for determination of trace lead in synthetic sample with satisfactory result.展开更多
文摘The article studied the resonance light scattering of protein red alizarin with the simple fluorescence spectrophotometer first.In Britton Robinson butter of 4.10,the red alizarin combined with proteins by intermolecular forces to form complexes,causing an enhance of resonance light scattering(RLS) at maximum wavelength of about 360nm.Based on the enhancement of resonance light scattering a novel method for the determination of proteins using red alizarin was developed.Though it affected by the limit of the filter of spectrophotometer the experiment used the wavelength of incident light doesn’t lie in the maximum wavelength,the method has better linear range within 0～10.0μg/ml,determination limits being 0.04μg/ml.The method had been used to determine total proteins in human serum samples and with accuracy and torelant to many foreign substance.
文摘In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the determination of fluorine. Fluorine has been absorbed in KOH solution after steam distillation. The optimum condition is 1.2mmol/L of Na 2CO 3 in eluting. It shows that the analytical result by LPIC is as satisfactory as that by (Ac-La) 2F 2 spectrophotometric mthods.
文摘Atom economy of the process of rare earth separation by using fluoride was discussed in this paper.We compared the atomic economic characters between the processes of vitriolic composite salt and fluoride,then stated that changing present rare earth producing process by green chemistry and technology transformation was the best way to make our rare earth manufacture prosperous.
文摘Six novel ferrocene-containing compounds with structure of Fe-C 6H 4-O 2C-C 6H 3(Br)-OC 10 H 21 ,compound 7,and Fe-C 6H 4-N=CH-C 6H 4-O 2C-C 6H 3(Br)-OC nH 2n+1 (Fe:ferrocenyl;n=2,4,6,8,10,compound 8,9,10,11,12)(series Ⅰ)were prepared.Their mesogenic behaviors were studied with DSC and polarized microscopic.The result showsed that compoud 7 did not possess liquid crystalline properties,while series Ⅰ compounds had narrow liquid crystal temperature range.
文摘Orthogonal design methocl,based on the formation of a yellow complex of lead(Ⅱ) with α、β、γ、δ Trtra(p sulfopheny 1) Porphine in the pH10.2 H 3BO 3 NaOH buffer selution,has been proposed.The maximum absorption wavelength (λ max ) is 464nm.The molar absorption coefficient(ε max ) is 2.5×10 5L·mol -1 ·cm -1 .The detection limit is 4μg·L -1 .Beer’s law is applicable in the rang of 0.1～10.4μg/25ml for lead.The method has been used for determination of trace lead in synthetic sample with satisfactory result.
