石油焦煅烧收尘粉在电极糊生产中的应用研究

研究了电极糊配方中添加不同比例的石油焦煅烧收尘粉对电极糊性能的影响。结果表明,随着收尘粉添加比例的增加,电极糊的灰分下降明显,而挥发分含量升高;电阻率起初变化不大,随后逐渐下降,当过量添加时,反而有所升高;体积密度和耐压强度随着添加比例的增加,呈现出先增加后减小的趋势。当收尘粉添加量约为15%时,电极糊制品的整体性能较好。     

不同生产方法糊树脂复配对PVC增塑糊黏度及稳定性的影响

采用相近聚合度、不同生产方法的两种树脂进行复配,研究各复配比例下增塑糊黏度及稳定性。结果表明：当微悬浮法糊树脂1与MSP-3法糊树脂2的配比为80/20时,糊黏度大且稳定性最差;当树脂1/树脂2 =50/50时,糊黏度较低,稳定性最好。树脂1中引入树脂2（含量小于50 %）使得体系黏度上升,黏度稳定性也变差,糊树脂颗粒形貌的影响比粒度分布的影响更大;树脂2中引入树脂1（含量小于50 %）可降低其黏度和提高黏度的稳定性,主要是糊树脂颗粒形貌和粒度分布优化的原因。     

用正交试验法研制优质密闭电极糊

采用正交试验方法,通过测定电煅无烟煤振实容重,获得了较优的密闭电极糊干料粒度组成。     

电极糊挥发分测定影响因素分析

对电极糊挥发分测定过程中的取样、样品制备、样品粒度、样品存留时问、称样量等影响因素进行分析。结果发现,样品的取样和制样能够显著影响挥发分测定结果,电极糊的挥发分随样品的留存时间逐渐降低,称样量对测定结果有一定影响,样品粒度对测定结果的影响较小。通过对试验方法和整个过程检测的精密度测定,结果表明了检测精密度主要影响在于取样和制样环节。     

电极糊使用性能初探

电极糊使用性能初探陈余珍（吉林炭素厂）１．前言电极糊是供矿热电炉电阻炉作为连续自焙电极，用来生产铁合金、电石、黄磷等产品。电极是设计电炉的中心环节，电炉的各项参数都以电极的尺寸、型状为先决条件。电极糊质量的优劣，不仅关系到各项经济技术指标完成与否，更...     

我国电极糊的研究现状

围绕当前电极糊的生产,分析了电极糊材料近年来的国内研究现状,重点对电极糊的原料配方、生产工艺、质量标准及应用进行了综述,从而提出目前国内电极糊生产的改进及发展方向。     

关于矿热炉用电极糊技术指标的探讨

介绍了矿热炉用电极糊的性能分析方法,结合电极糊生产和使用实践,较为详细地研究讨论了目前能够了解到的所有的电极糊技术指标及其测试方法,希望能对电极糊厂家产品质量的稳定和提高有所裨益。     

电极糊的使用与质量事故

本文介绍了电极糊的使用消耗过程及质量要求，分析了电极糊质量事故产生的原因，提出了相应的对策。     

我国电极糊现状与实际使用中的问题综合分析

本文论述了电极糊的生产特点和原料选择，综述了国内外使用电极糊的矿热炉现状与发展趋势。通过对电极糊实际工作过程中的物理化学变化及温度分布分析，提出了优质电极糊应具备的五种重要特性。最后讨论了电极糊在使用过程中常见的软硬断事故的主要原因。     

电极糊和阳极糊配料混捏温度的最佳化

关于电极和阳极糊配料混捏温度的选定,文献中有互相矛盾的意见。在电极糊14—140—08—84的生产工艺规程中,所建议的混捏温度为120～140℃,在文献[1]中所给出的温度为160～170℃,在文献[2,3]中,所给出的温度为120～140℃。     

碳糊电极和化学修饰碳糊电极制备及应用综述

综述了碳糊电极及化学修饰碳糊电极的发展、制备及表征,概括了近年来化学修饰碳糊电极在食品分析、药物分析、环境监测等领域的应用,并展望了其发展前景。     

碳糊电极和化学修饰碳糊电极制备及应用研究进展

碳糊电极(CPE)是一种广泛应用于电化学领域的新型电极.将石墨粉和粘合剂混合成均匀的碳糊,然后将其挤压进电极管中便制成了碳糊电极.具有制备方法简单、背景电流小、无毒、电位窗口宽等优点,但由于制备过程中加入了不导电的粘合剂而降低了检测灵敏度.因此,制备碳糊电极时常加入修饰材料以提高电极的电化学性能.概述了碳糊电极和化学修...     

碳糊电极和化学修饰碳糊电极制备及应用研究进展

碳糊电极(CPE)是一种广泛应用于电化学领域的新型电极。将石墨粉和粘合剂混合成均匀的碳糊,然后将其挤压进电极管中便制成了碳糊电极。具有制备方法简单、背景电流小、无毒、电位窗口宽等优点,但由于制备过程中加入了不导电的粘合剂而降低了检测灵敏度。因此,制备碳糊电极时常加入修饰材料以提高电极的电化学性能。概述了碳糊电极和化学修饰碳糊电极的发展、制备方法和应用,对制备电极的材料和修饰剂的选用进行了分析。概括了近些年来化学修饰碳糊电极在不同领域的应用。     

Comparative investigation on electrochemical behavior of hydroquinone at carbon ionic liquid electrode, ionic liquid modified carbon paste electrode and carbon paste electrode

Ionic liquid, 1-heptyl-3-methylimidazolium hexafluorophosphate (HMIMPF₆), has been used to fabricate two new electrodes, carbon ionic liquid electrode (CILE) and ionic liquid modified carbon paste electrode (IL/CPE), using graphite powder mixed with HMIMPF₆ or the mixture of HMIMPF₆/paraffin liquid as the binder, respectively. The electrochemical behaviors of hydroquinone at the CILE, the IL/CPE and the CPE were investigated in phosphate buffer solution. At all these electrodes, hydroquinone showed a pair of redox peaks. The order of the current response and the standard rate constant of hydroquinone at these electrodes were as follows: CILE > IL/CPE > CPE, while the peak-to-peak potential separation was in an opposite sequence: CILE < IL/CPE < CPE. The results show the superiority of CILE to IL/CPE and CPE, and IL/CPE to CPE in terms of promoting electron transfer, improving reversibility and enhancing sensitivity. The CILE was chosen as working electrode to determine hydroquinone by differential pulse voltammetry, which can be used for sensitive, simple and rapid determination of hydroquinone in medicated skin cosmetic cream.     

化学修饰碳糊电极的研究新进展

碳糊电极和化学修饰碳糊电极在电化学研究中起着非常重要的作用,综述了近年来化学修饰碳糊电极的优势及劣势、制备及应用,且分析了修饰剂的选择,最终对其进行了展望。     

Surfactant modified zeolite carbon paste electrode (SMZ-CPE) as a nitrate selective electrode

A nitrate-selective electrode based on surfactant-modified zeolite (SMZ) particles into carbon paste was proposed (SMZ-CPE). The electrode was fully characterized in terms of composition, response time, ionic strength, thermal stability and usable pH range. The electrode containing 10% SMZ exhibited linear response range to nitrate species in the range of 1.00 × 10⁻⁶ to 1.00 × 10⁻³ M with a detection limit of 1.00 × 10⁻⁶ M and a Nernstian slope of 59.4 ± 0.7 mV per decade of nitrate concentration. The response of the electrode to nitrate remains constant in the pH ranges of 3.5–9.8 and 1.7–10.5 for 1.00 × 10⁻⁴ and 1.00 × 10⁻² M nitrate, respectively, and in presence of 1 × 10⁻⁴ to 1 × 10⁻³ M NaCl. The response of the electrode reaches to its equilibrium value within several seconds (10 s) after immersing the electrode in nitrate solution. Selectivity coefficients showed multivalent anions (such as arsenate, dichromate and sulfate) have higher interferences than monovalent anions (such as iodide, fluoride, bromide, chloride and thiocyanate). The electrode was used for determination of nitrate in an ammonium nitrate fertilizer sample, using direct potentiometry, and the satisfactory results were obtained. The electrode was also used for the potentiometric titration of nitrate. The validation of the obtained results in each case was proved by statistical “t” and “g” tests.     

Electrocatalytic reduction of dioxygen on hemin based carbon paste electrode

A hemin-modified carbon paste electrode was constructed by a simple, rapid and effective method. The electrochemical behaviour of the modified electrode was characterized by cyclic voltammetry. The modified electrode obtained was very stable and exhibited electrocatalytic response for the reduction of oxygen. The possible mechanism for the catalytic reduction of dioxygen is discussed. The dioxygen is reduced via a one-step reduction accompanying four electrons and four protons transfer at pH 7–11.     

碳糊电极阳极吸附伏安法测定阿司咪唑

在0.40mol/L的HAc-NaAc(pH 4.6)缓冲液中,阿司咪唑在碳糊电极(CPE)上有一灵敏的吸附氧化伏安峰,峰电位为0.84V(vs.SCE)。该氧化峰的二阶导数峰电流与阿司咪唑的浓度在2.0×10-9~1.0×10-7mol/L(富集90s)范围内呈良好的线性关系,相关系数r为0.9980,检出限为1.0×10-9mol/L,探讨了阿司咪唑在碳糊电极上的伏安性质和电极反应机理,并且成功地应用于息斯敏片含量的测定,加标回收率在99.7%~100.3%之间,结果与紫外分光光度法基本吻合。     

Silica gel modified carbon paste electrode for electrochemical detection of insulin

A silica gel-modified carbon paste electrode (Si-CPE) was fabricated and used for selective and sensitive determination of insulin. The experimental results suggested that insulin effectively accumulated on surface of the modified electrode resulting in a marked enhancement of its oxidation current response. Therefore, the modified electrode was used as an electrochemical sensor for the differential pulse adsorptive stripping voltammetric and hydrodynamic amperometric determination of insulin. The influence of various experimental parameters on the voltammetric response of insulin was investigated. Using hydrodynamic amperometry, under optimum conditions, calibration plot for insulin was linear in the range of 90–1400 pM. The sensitivity and detection limit of the proposed amperometric method were found to be 107.3 pA/pM (1511.3 pA/pM cm²) and 36 pM, respectively. The electrode has the remarkable advantages of simple preparation using inexpensive material, high reproducibility, good chemical and mechanical stabilities, and easy surface renewal owing to bulk modification. The high selectivity of the modified electrode towards oxidation of insulin in the presence of sulfur containing amino acids including cystine, cysteine, and glutathione is a key advantage of the proposed electrode.     

培氟沙星在碳糊电极上的阳极吸附伏安法研究

在0.40 mol/L的NaAc-HAc(pH 4.9)缓冲液中,使用JP-303极谱分析仪,培氟沙星在碳糊电极(CPE)上有一灵敏的吸附伏安氧化峰,峰电位为1.03 V(vs.SCE)。该氧化峰的二阶导数峰电流与培氟沙星的浓度在8.0×10-9~8.0×10-7mol/L(富集90 s)范围内成良好的线性关系,相关系数r为0.998,检出限为4.0×10-9mol/L(S/N=3,富集110 s)。探讨了培氟沙星在碳糊电极上的伏安性质和电极反应机理,并且成功应用于胶囊中培氟沙星含量的测定。