Physicochemical and Sorption Properties of Silica Gel with Immobilized Xylenol Orange Surface Groups

Organomineral sorbents were prepared by sorption immobilization of Xylenol Orange on the surface of two different samples of silica gel from aqueous solutions with pH 1.68 under static conditions. The diffusion coefficients of Xylenol Organe in the near-surface layer of silica gel and the equilibrium sorption constants were determined. Wash-out of the dye from the sorbent was studied. Sorption of Cu(II), Zn(II), and Pb(II) on the sorbents from aqueous solutions with pH 5.8 was studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 73–78.Original Russian Text Copyright © 2005 by Korneev, Kholin.     

表面活性剂增敏二甲酚橙显色测定磺胺嘧啶

本文利用光度法研究了在氯化十六烷基吡啶(CPC)、十六烷基三甲基溴化铵(CTAB)分别存在下,磺胺嘧啶(SD)和二甲酚橙(XO)的显色反应体系。实验结果表明:在中性介质中XO-SD-CPC、XO-SD-CTAB体系的显色反应快速、灵敏、稳定,吸光度明显增强,SD质量浓度分别在0~5.0 mg.L-10、~2.0 mg.L-1范围内符合比耳定律。两种方法用于片剂中磺胺嘧啶的测定,结果令人满意。     

基于铅（Ⅱ）-二甲酚橙配合物反应光度法测定血清蛋白

在pH 6.1的磷酸氢二钠-柠檬酸钠-磷酸缓冲溶液中,血清蛋白与铅-二甲酚橙反应生成复合物,最大吸收波长为300 nm,以牛血清蛋白为分析物,当牛血清蛋白的质量浓度在7 mg.L-1以内遵守比耳定律,其检出限(3S/N)为7.4×10-3mg·L-1.应用所提出的方法分析了3组人血清蛋白试样,所得结果用常规的CBBG-250方法作了校核.     

Determination ofo-Cresol Red in Xylenol Orange and semi-Xylenol Orange by third-order derivative spectrophotometry

A new method is proposed for the determination ofo-Cresol Red in Xylenol Orange and semi-Xylenol Orange by third-order derivative spectrophotometry at 491 nm in a medium of 0.09 mol/1 sulphuric acid. A linear relationship exists between d³A/d³ and theo-Cresol Red concentration (1–12 g/ml), with a standard deviation of 0.11 g/ml (n = 8) for 10 g/ml ofo-Cresol Red.Presented at the 34th IUPAC Conference (1993)     

Richment and Determination of Trace of Cadmium in Environmental Water with Silica Immobilized Benzene-Diazo-Dmino-Azobenzene

Chelating reagents supported (or banded) on silica gel for preconcentration and separation of trace amount of metal ions has been reported recent years. These methods improve analytical sensitivity and selectively greatly,and make it possible for many trace elements to be determineted in the Environmental fieled.     

Differential Pulse Anodic Stripping Voltammetric Determination of Lead (II) Using Poly Xylenol Orange Modified Electrode

In this work a method for sensitive anodic stripping voltammetric determination of Pb(II) ions using a poly xylenol orange film modified electrode (PXOFME) has been proposed. Poly xylenol orange film (PXOF) was formed on a paraffin impegrenated graphite electrode (PIGE) using electro polymerization method by scanning the potential between −0.5 V to 1.3 V, at a scan rate of 50 mV/s for 30 segments in 0.1 M phosphate buffer solution (PBS) of pH 7. The PXOFME was characterized by scanning electron microscopy (SEM), ATR‐IR spectroscopy, cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). The modified electrode has been used to develop a sensitive method for the determination of Pb(II) ions by anodic stripping voltmmetry (ASV). The PXOFME was used to preconcentrate Pb(II) ions through complexation, the complexed metal ions were reduced electrochemically and then stripped anodically from the surface of the electrode. A linear range of 5 μg/L to 413 μg/L with a limit of detection (S/N=3) of 1.6 μg/L was observed for the determination of Pb(II) ions. The method was applied to lead determination in sea water and tap water samples and the results were found to be satisfactory.     

速差动力学分析法同时测定铬铁离子的研究

速差动力学分析是利用2种性质不同的离子与显色剂反应速度不同进行测定的分析方法.目前各种废水中Fe(Ⅲ)、Cr(Ⅲ)共存的情况较为多见,测定时互有干扰.二甲酚橙与Fe~(3+)、Cr~(3+)作用形成的2种配合物具有相似的吸光特性,但生成速率有显著差异.铁与二甲酚橙在室温下反应迅速,而且随温度升高其吸光度几乎不变,而铬与二甲酚橙在室温下几乎不发生反应,加热才有明显反应.据此本文同时测定了铬、铁混合物.该方法快速简便,最低检出限0.1μg/mL,回收率95％～106％.利用本法可监测印染废水中的铬、铁离子.     

Semi-automated determination of aluminium with Xylenol Orange

The photometric determination of aluminium by automated colour development with Xylenol Orange is described. The reagent has been found to act faster if used in alcohol solution.     

Separation of Xylenol Orange, Semi-Xylenol Orange and o-Cresol Red

Several aqueous organic solvent systems have been investigated for the extractive separation of Xylenol Orange (XO), Semi-Xylenol Orange (SXO) and o-Cresol Red (CR). Four methods of determination of the extracted species were used. The best separation of CR and SXO was obtained with aqueous 1-butanol and of SXO and XO with the 0.5M sulphuric-1-butanol system.     

Spectrophotometric determination of thorium with Xylenol Orange and cetyltrimethylammonium bromide

The thorium-Xylenol Orange reaction sensitized by cetyltrimethylammonium bromide ( = 5.51 x 10(4) l.mole(-1).cm(-1)) is accompanied by a bathochromic shift from 570 to 600 nm. The system is more selective than the binary system, because the reaction pH is lowered from 4.0 to 2.5; Beer's law is obeyed for 0.04-4.00 ppm of thorium.     

The Use of Zirconyl Xylenol Orange for the Post-Column Spectroscopic Detection of Fluoride in Ion Chromatrography

Abstract

A simple post column reaction detection system for fluoride is presented using the decolorization of the zirconyl xylenol orange complex. A 3[sgrave] detection limit of 0.05 μg F^? mL^?1 was achieved with a linear calibration function up to 10 μg F^? mL^?1. The methodology is suitable for the determination of F^? in potable water and some interferences studies were conducted with common cations namely Ca, Mg, Al and Fe(III).     

二硫代乙二酰胺改性硅胶固相萃取-火焰原子吸收光谱法测定水中的痕量铜和铅

制备了二硫代乙二酰胺改性硅胶作为固相萃取吸附剂,在pH 5.2,吸附时间为40min时,得到Cu2+、Pb2+的最大静态吸附容量,分别为19.50,29.39mg·g-1。水样中痕量的Cu2+、Pb2+经固相萃取后采用火焰原子吸收光谱法测定。在最佳条件下,Cu2+、Pb2+的线性范围分别为1.0~100,10~300μg·L-1,检出限(3S/N)分别为0.7,5.0μg·L-1。加标回收率在97.6%~104%之间。方法用于分析标准模拟水样,测定值与认定值相符。     

氢化物-原子吸收光谱法测定电解铅中锑

电解铅中锑的测定一般采用光度法 ,此法灵敏度低、操作繁琐 ,本法采用氢化物 原子吸收光谱法测定 ,操作简便、快速、灵敏度高。1　试验部分1.1　仪器与试剂ＡＡ32 0 ＣＲＴ型原子吸收分光光度计 (上海分析仪器总厂 )ＷＨＧ 10 2Ａ2型流动注射氢化物发生器 (北京瀚时制作所 )吴氏高性能锑空心阴极灯 (含电流分配器 )锑标准溶液 :10 0ｎｇ·ｍｌ-1硼氢化钾溶液 :15ｇ·Ｌ-1(0 .3ｇ 10 0ｍｌ氢氧化钠 )　　　还原剂 :10 0ｇ·Ｌ-1抗坏血酸 ,10 0ｇ·Ｌ-1碘化钾。　　　　1.2　测试条件灯电流 :主机 15ｍＡ ,调电流分配器以调至能量出现最大值…     

Ion-Exchange Separtion and Determination of Mn,Co, Zn and Ni with Xylenol Orange as Post-Column Reagent

ABSTRACT

A method for the simultaneous determination of Mn, Co, Zn and Ni which combines Ion-chromatography and a post column reaction with xylenol orange is described. Using 0.07 M oxalic acid (pH adjusted to 5.5 with lithium hydroxide) as eluent, Mn, Co, Zn and Ni were first separated on a 4x250mm IonpacCS-5 column having both sulphonic acid and Alkyl quaternary ammonia functional groups and then transferred to a post-column reaction coil, where the elements react with xylenol orange. The coloured complexes formed were spectrophotometrically measured at 570 nm. The procedure has been successfully applied for the determination of Co, Zn and Ni in Al-bronze.     

Flow-Injection Determination of Iron Based on Its Catalysis on the Oxidation Reaction of Xylenol Orange by Potassium Bromate

A flow injection system is proposed for catalytic kinetic spectrophotometric determination of trace iron(II + III). The involved reaction is based on the catalytic effect of iron(III) on oxidation reaction of xylenol orange by potassium bromate to form a blue-violet complex. Iron(II) is also determined, being oxidized to iron(III) by potassium bromate. The calibration graph is linear in the range of 0.02–10.0 µg l^?1 and 10.0–1100 µg l^?1. The relative standard deviation is 1.5% for 4.0 µg l^?1 iron(III) and 2.3% for 60.0µg l^?1 iron(III) (n = 11). The presented system was applied successfully to the determination of iron in natural waters.     

二甲酚橙在锌糖浆剂及锌化合物含量测定中的应用

用价廉、易得的二甲酚橙作显色剂，分光光度法测定了赖氨酸锌糖浆、硫酸锌糖浆和赖氨酸锌含量，并与ＰＡＮ法和锌试剂法进行了比较。结果表明，本法与ＰＡＮ法和锌试剂法结果基本一致，回收率高，精密度较好，灵敏度较高。说明可用本法代替ＰＡＮ法或锌试剂测定锌糖浆剂及锌化合物的含量。     

The influence of dissociation on simultaneous determination of zirconium and hafnium with Xylenol Orange

The molar absorptivities of the zirconium and hafnium Xylenol Orange (1:1) complexes are said to be similar in the acidity range 0.1-2.0M HCl. However, the absorbances obtained for the zirconium-Xylenol Orange complex in the acidity range 0.5-2.0M HCl are much higher than those for the same concentrations of hafnium. The absorbance differences are generally due to the higher stability of the zirconium complex at such acidities. Calculations based on the conditional stability constants of these complexes show the influence of dissociation on the results of simultaneous determination of zirconium and hafnium with Xylenol Orange.     

Spectrophotometric determination of small amounts of Xylenol Orange, Semi-Xylenol Orange and o-Cresol Red

An extraction method based on the butanol—water system is used in an improved spectrophotometric determination of Xylenol Orange (XO), Semi-Xylenol Orange (SXO) and Cresol Red (CR) in mixtures. Small amounts of SXO in the presence of much greater amounts of XO, and small amounts of XO in the presence of large amounts of SXO can be determined with good accuracy after extractive separation of the compound to be determined, from the bulk of the other components of the mixture.     

Separation and microdetermination of rare earth metals with N-phenylbenzohydroxamic acid and Xylenol Orange

A simple, sensitive and selective method for solvent extraction and spectrophotometric determination of lanthanum(III), praseodymium(III), neodymium(III) and samarium(III) is described. The rare earth metals are extractable into chloroform solution of N-phenylbenzohydroxamic acid (PBHA) at pH9–10. Various parameters are studied to optimize the extraction conditions. Stoichiometry of the complexes and the effect of various ions is discussed. The molar absorptivity is found to increase from 65,000 to 93,000 1·mol^–1· cm^–1 with the increase in atomic number of the rare earths. The stability constants of the complexes, separation factors and pH_{5 0} are discussed.