The thermodynamic and mechanism of sorption process of clinoptilolite in K+-Na+ solutions have been studied. The sorption isotherms were measured at different temperatures, equilibrium coefficients and enthalpy ?H were calculated. The measured results were fitted with the curve Langmuir isotherm very well. Potassium equilibrium coefficients in K+-Na+ solutions were negatively correlated to temperature and Enthalpy ?H was negative. The sorption process was spontaneous exothermic reaction.

The adsorption behavior of NH~+_4-pretreated clinoptilolite for potassium ions was studied.The effects of competing cations were investigated.The results indicate that NH~+_4-pretreated(clinoptilolite) adsorbed potassium ions with high adsorption capacity.The adsorption behavior of the NH~+_4-pretreated clinoptilolite(deviated) from the original trend at the equivalent fraction of K~+ in the clinoptilolite Y_(K~+)=0.5 due to the effect of potassium concentration.The presence of competing cations,mainly sodium ions,surpressed the exchange capacity for potassium,in particular the ratio of potassium ions to sodium ions directly influenced the selec-(tivity) of potassium on the NH~+_4-pretreated clinoptilolite.

利用废熔盐研制了一种新型复合混凝剂PMFC(聚合氯化镁铁),应用该复合混凝剂对印染模拟废水以及实际废水进行了处理,并对其混凝机理进行了探讨。实验结果表明:该复合混凝剂在合适的条件下对印染废水具有良好的处理能力,其脱色效果明显优于PAC。此外,该复合无机混凝剂具有成本低、脱色率高、沉降速度快等优点。

An UV spectrophotometric method was established for the determination of vitamine C in troches in acidic medium.The linear range of the method is 0—1.4mg/mL,and the recovery varies in the range of 98.4%—102%.This method is simple and accurate with satisfactory results.

The catalytic organic residue contained Rh was digested with HNO3 at 130degreesC for 12 h. Trace noble metal Rh in catalytic organic residue was determined by flame atomic absorption spectrophotometry. Rh was atomized by air-acetylene flame at lamp Current of 7 mA. The methods of sample pretreatment for Rh in residue were compared in this paper. The recovery rates of this method were 95.3%-105.5% and the relative standard derivation was 0.9% The method was applied to the analysis of some practical samples and the results obtained were satisfactory.

The technique based on VRML and JAVA has been used to setup the Web 3D Virtual Interactive Atomic Absorption Lab. VRML has been used to construct the Virtual Apparatus, which has many functions such as controllable nonlinear shift between scenes and between view points, simulation of operation, etc. In fact, this part equals to the hardware in reality. JAVA has been used to construct the workstation, which realizes the control of different parts of apparatus, the setup of parameters, etc. The data exchange process has been successfully realized between virtual hardware and simulated software. The Virtual Atomic Absorption Lab built under this theory can run on the net.

人才的培养很重要一方面是人才整体素质的培养。大学是人才培养的前沿阵地，如何提高学生的整体素质水平，这是当前摆在每一位教师面前的一个重要课题。我们在分析化学实验教学中，不断地探索和研究有效的教学方法、方式和手段，进而更好地培养学生应具备的科技人才的素质，即严谨、求是的科学态度，探索、创新的进取精神，综合思维与解决问题的实践能力。

A method for the liquid-liquid micro-extraction and gas chromatographic analysis of trace phenol in small amount of aqueous sample has been developed. The influences of acid and salts on recovery rate of phenol were examined. And, the influences of injection speeds and the conditions of silica wool in injection port on the quantitation precision were tested. With a direct injection port, an FID and a DB-1 capillary column of wide bore, a detection limit of 1 microgram.L-1 can be obtained employing 8 mL water sample, 160 microL ethyl acetate and 3.5 g ammonium sulfate. The added recoveries were in the range of 95.0%-98.5%. The relative standard deviations were in the range of 2.8%-3.3%. This method is simple, convenient, rapid, accurate and practical.

Zinc in applevinegar that can be drinked directly and in plain boiled water is determined by FAAS.The relative standard deviation (RSD) is 1.28%—1.85% and the rate of recovery is 101%—109%.

本文研究了用HNO3+HClO4(3+1)混酸消化鱼脑和鱼肉,在324.8nm波长处测定铜,在213.9nm波长处测定锌.多种离子均无干扰,RSD为0.58%-2.90%,加标回收率为97%-109%,结果令人满意.