Chemiluminescence of Luminol-potassium Ferricyanide with Benserazide and Application in Analytical Chemistry

Benserazide (D, L-serine-2-[2,3,4-(trihydroxyphenyl)methyl]hydrazide) is one of aroma- tic L-amino acid decarboxylase inhibitors, and used with levodopa for treatment of Parkinson’s disease1. Hence, determination of benserazide is an indispensable program. Recently, chromatography2, spectrophotometry3,4 and capillary electrophoresis5 have been used for the determination of benserazide. However, these methods are low sensitive and inconvenient. In order to search new method for detecting ben…     

安替比林基重氮氨基—2,4—二硝基苯间接分光光度法测定痕量氰化物

１引言氰化物是环境监测和食品检验中必测的剧毒物之一。研究表明，在ｐＨ＝１０．５～１２．８的条件下，氰离子使银与安替比林基重氮氨基－２，４－二硝基苯（ＡＰＤＮＢＴ）络合物褪色，其褪色程度与氰离子的浓度呈良好的线性关系，从而建立了新的间接测定氰离子的分光光度方法。对于浓度低于０．０５ｍｇ／Ｌ时氰离子的测定，提出了标准加入分光光度法，提高了低含量氰离子测定的准确度和可靠性。２实验部分２．１仪器和试剂７２２型光栅分光光度计，ｐＨｓ－２型酸度计；银标准溶液为１５．０ｍｇ／Ｌ，氰离子标准溶液为５．０ｍｇ／Ｌ…     

A Green and Facile Solid-state Synthesis Method for the Preparation of Diazenecarboxamide Azo Compounds with Potassium Ferricyanide and Sodium Hydroxide System

Eleven new-typed azo compounds were synthesized in good yields by dehydrogenating the corresponding aryl substituted semicarbazides using potassium ferricyanide and sodium hydroxide system under solid-state conditions.     

冷原子荧光法间接测定水中氰化物

本文详细研究了氰化物蒸馏条件及其稳定性问题，建立了一个冷原子荧光法间接测定水中氰化物的方法，并用于海水及氰化液中痕量ＣＮ－的测定，结果令人满意。ＣＮ－检出限为０．０２μｇ／ｍＬ，回收率９５％～９８％，变异系数７．３％～８．９％。     

微孔膜气体扩散分离流动注射光度法测定废水中氰化物

研究了利用吡啶-巴比妥酸显色体系反应的中间产物,采用微孔膜气体扩散分离流动注射分析技术测定工业废水中氰化物,该法具有简便、快速并能消除某些干扰的特点。进样频率为65个样/h,检出限为0.02μg/ml,取氰化物2.5μg/ml时测量的相对标准偏差为0.3％(n=20),测定实际样品结果令人满意。     

Simultaneous Impedance Analysis of Three Parallel Piezoelectric Quartz Crystals for Electrochemical Depletion Layer Effect Study

Simultaneous impedance analysis of three one-face sealed resonating piezoelectric quartz crystals (PQCs) in parallel is proposed through admittance measurements of the three PQCs on one impedance analyzer and then non-linear fitting according to the parallel combination of three Butterworth-Van Dyke circuits. Responses of each PQC obtained from the three-PQC mode agreed well with those measured separately in series sucrose aqueous solutions. This novel method has been used for the study of depletion-layer effect during ferri-/ferrocyanide electrochemical reactions.     

高铁酸钾去除微污染水源水中氰化物的试验研究

以高铁酸钾(K2FeO4)为氧化剂,对微污染水源水中微量 CN- 的去除进行了研究,考察了 pH、温度、反应时间、K2FeO4 投加量、CN- 初始浓度等因素对 CN- 去除的影响;并对用 K2FeO4 氧化除 CN- 机理进行了初步探讨.结果表明,pH 在7～10.5范围内,CN- 去除率随着 pH 的上升而升高;温...     

A new way to synthesize benzoin isopropyl ether on Cu-Fe-hydrotalcite

An efficient synthesis of benzoin isopropyl ether with benzaldehyde and propanol in the presence of heterogeneous recyclable Cu-Fe-hydrotalcite catalyst has been explored. Cu-Fe-hydrotalcite was firstly successfully synthesized over Jahn-Teller effect of Cu2+. The catalytic test result showed that Cu-Fe-hydrotalcite could be used as a good catalyst in the synthesis of benzoin isopropyl ether. The highest conversion of benzaldehyde was 59.7% and the selectivity of benzoin isopropyl ether was nearly 100%. By ...     

Solid-phase Synthesis of PNA Monomer by Ugi Four-component Condensation Reaction

Peptide nucleic acids (PNA) oligomers were synthesized in most cases by peptide a peptide synthesis from N-protected monomers. In this work a new method of obtaining PNA monomer by Ugi four-component condensation reaction was tested by solid-phase synthesis. The Fmoc protected PNA monomer was build up with thymin-l-yl acetic acid, 3-methylbutyl aldehyde, Fmoc protected aminoethyl isocyanide and Gly-Wang resin.