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<正>一、医用计量器具强检内容及意义根据《计量法》、《强制检定的工作计量器具检定管理办法》等计量法律、法规的要求,国家质检总局多次发文,要求各级质量技术监督部 相似文献
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<正>虽然国际油价持续低迷,国内三大石油公司仍然对油气产业前景充满信心,逆势而上,计划增加今年原油产量。中国石油二次开发老油田为了增加原油产量,中国石油今年正式确定了玉门、吉林、冀东和克拉玛依、长庆、辽河"三大三 相似文献
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伴随管理体系的深化改革和技术创新,炼铁厂逐步打破传统的生产模式,对各项生产环节进行优化,改进生产设备,采用先进生产技艺,推动炼铁厂产品质量朝着更高的标准发展.结合某炼铁厂实际案例进行分析,针对360 m2烧结机进行改进,从熔剂破碎技艺、材料自动化管理、温度控制以及机体安装等环节着手进行.通过系统优化后,整体效率有了质的... 相似文献
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The aim of this work was to investigate the effect of different surfactants on the removal efficiency of heavy metals in sewage sludge treated by a method combining bio-acidification with Fenton oxidation. Four surfactants were adopted such as anionic surfactant(sodium dodecyl benzene sulfonate, SDBS), nonionic surfactants(tween-20 and tween-60) and cationic surfactant(hexadecyl trimethyl ammonium chloride, HTAC), respectively. The indigenous sulfur-oxidizing bacteria in bio-acidification phase were enriched and cultured from fresh activated sludge obtained from a wastewater treatment plant. It is shown that different surfactants exhibited distinct effect on the removal efficiency of heavy metals from sewage sludge. The nonionic surfactants,especially tween-60, promotes the solubilization of heavy metals, while the anionic and cationic surfactants hinder the removal of heavy metals. Copper is efficiently leached. The removal efficiency of cadium is relatively lower than that of Cu due to the demand for rigorous p H value. Lead is leached with a low efficiency as the formation of low soluble Pb SO4 precipitates. 相似文献
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为开发针对水生生物体内典型土腥味物质的快速检测方法,以2-异丁基-3-甲氧基吡嗪(2-isobutyl-3-methoxypyrazine,IBMP)为检测内标,基于分散固相萃取技术与气相色谱串联质谱联用技术开展鱼组织中土臭素(geosmin,GSM)和2-甲基异莰醇(2-methyli-soborneol,2-MIB)的检测方法开发。采用乙腈作为提取溶剂,试样提取后经脱水和吸附净化,气相分离后采用选择离子(selected ion monitor,SIM)监测模式测定。对鱼组织样品的检测结果表明,GSM 和 2-MIB 在 0.50 μg/L~500.00 μg/L 线性良好,相关系数 R2≥0.999,检出限分别为 0.37 ng/g和 0.51 ng/g,方法的定量限分别为1.23 ng/g和1.69 ng/g。3个水平的加标试验表明,方法中GSM和2-MIB的加标平均回收率为99.7%~115.7%(n=3),相对标准偏差为3.0%~14.0%,方法能够满足对不同鱼类样品的检测。 相似文献
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