<正>蜂蜜是一种特殊的食品,是蜜蜂采集蜜源植物花蜜酿制而成的天然甜味物质,组分复杂,营养丰富。在我国吃蜂蜜最多的人群是老人、儿童和病人,所以它的质量更引人关注。然而近年来,蜂蜜品质差、掺假造假的现象层出不穷,严重影响市场秩序。国家质检总局和国家标准化管理委员会于2005年10月新修订了蜂蜜国家

The water-phase suspension phase-transfer process of chlorinated paraffin-70 production was developed depending on the traditional water-phase process of chlorinated paraffin-70 production.The chlorination temperature of the process is low(≤120 ℃),and the chlorination cycle is short.The water-phase suspension phase-transfer is completed from two phases(gas and liquid) to three phases(gas,liquid,and solid) during the reaction and the powder suspension solution is formed.The last-term temperature is lower than the softening point of the material.The process is advanced and the production is safe.

After being extracted by acetonitrile,solid phase extration(SPE),eight sulphonamides residues in animal issues could be separated on Agilent C18 column using acetonitrile∶0.017mol/L H3PO4=1∶4 as the mobile phase at a flow rate of 1.0mL/min,and then simultaneously detected at 270nm,the column temperature was at 30℃.The quality was determined with retention time and the concentrations were determined with area calibrated curves.A good linear relationship exists for all residues in concentration range of 0.005~1.0μg/mL,while the detection limit were 0.005 to 0.01μg/mL.The recovery rates of sample were in the range of 80.78%~120.72% at the add level of 0.02 and 0.04mg/kg.Eight sulphonamides residues could be separated completely,which proved to be accurate and reliable.

This paper describes a way in which glyphosate is purified from industrial product as the standard sample. Through identify and titrate,the purity of standard sample is up to 99%,that can be used as the standard sample to inspect commodity and analyse pesticide remainder.

Experimental research and computational analysis show that the combustion reaction occurs in a broad area,almost taking place simultaneously within the whole furnace,for natural gas under Normal Temperature Air Flameless Combustion (NTAFC). In combustion aera,the activation E is smaller in a majority of furnace,the atomy group and middle production that produced during combustion of natural gas is turned into CO2 and H2O easierly. The concentration of NOx and that of CO in flue gas are relatively low and are less affected by excess air coefficient and volumetric thermal load. The natural gas under NTAFC has high combustion efficiency.

本文介绍了氧化锡气敏传感器参杂金属（Sb,Ca,Sr）的制备及检测农药残留检测装置的原理,通过对氧化锡气敏传感器,在动态与静态条件下,检测农药残留的响应特征及影响因素进行了研究,如采用电压、占空比、电压波形（矩形波、正弦波、锯齿波、脉冲波）的变化,比较研究了农药残留检测的动态与静态响应特征,结果表明动态的测量方法比静态方法可以得到更多的信息,用这种动态测量方法检测对硫磷等有机磷类农药残留具有良好效果。

对鸡蛋中的甾类同化激素残留的检测方法进行了探索,使用高效液相色谱方法检测雌二醇、雌酮、雌三醇、睾酮4种激素类药物的残留.4种激素药物残留最低检出限为0.01μg/ml,该方法样品回收率在75.8%～104.3%,操作简便.