为观察不同杀菌试验方法对同种消毒剂杀菌效果的差别,采用2002年版《消毒技术规范》规定的悬液定量杀菌试验和载体定量杀菌试验对一种复方醋酸氯己定消毒剂杀菌效果进行了比较。结果,用悬液定量杀菌试验,含醋酸氯己定4040 mg/L的该消毒...为观察不同杀菌试验方法对同种消毒剂杀菌效果的差别,采用2002年版《消毒技术规范》规定的悬液定量杀菌试验和载体定量杀菌试验对一种复方醋酸氯己定消毒剂杀菌效果进行了比较。结果,用悬液定量杀菌试验,含醋酸氯己定4040 mg/L的该消毒液对金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌作用1.5 m in,其平均杀灭对数值均>5.00;对白色念珠菌作用1.5 m in,其平均杀灭对数值>4.00。用载体定量杀菌试验,用相同浓度消毒剂对金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌作用3 m in,其平均杀灭对数值>3.00;对白色念珠菌作用3 m in,其平均杀灭对数值>3.00。结论,两种定量杀菌试验评价同一复方醋酸氯己定消毒剂,其杀菌效果具有一定差别。展开更多
为研究加热对双癸基二甲基氯化铵(一种双链季铵盐消毒剂)杀灭细菌芽孢的增效作用,采用悬液定量杀菌试验方法进行了实验室观察。结果,在常温(20℃)下,含双癸基二甲基氯化铵5000 mg/L的该双链季铵盐消毒液对枯草杆菌黑色变种芽孢基本无杀...为研究加热对双癸基二甲基氯化铵(一种双链季铵盐消毒剂)杀灭细菌芽孢的增效作用,采用悬液定量杀菌试验方法进行了实验室观察。结果,在常温(20℃)下,含双癸基二甲基氯化铵5000 mg/L的该双链季铵盐消毒液对枯草杆菌黑色变种芽孢基本无杀灭作用。将2500 mg/L该双链季铵盐消毒液加温至40℃作用120 m in,对枯草杆菌黑色变种芽孢杀灭对数值>3.0;加温至60℃作用30 m in,杀灭对数值>3.0。将1250 mg/L该双链季铵盐消毒液加温至80℃作用60 m in,对枯草杆菌黑色变种芽孢杀灭对数值>5.00。结论,双癸基二甲基氯化铵在常温20℃条件下不具有杀灭细菌芽孢作用,作用温度升到40℃以上即显示出杀灭细菌芽孢的效果,且随温度升高,杀灭芽孢速度加快。展开更多
Ultrasonic aided slurry sampling hydride generation atomic fluorescence spectrometry （USS-HG-AFS） was developed for the determination of Hg in soil samples from a sewage-irrigated farm. 500 mg grounded soil was susp...Ultrasonic aided slurry sampling hydride generation atomic fluorescence spectrometry （USS-HG-AFS） was developed for the determination of Hg in soil samples from a sewage-irrigated farm. 500 mg grounded soil was suspended in agar solution by an ultrasound water bath before the HG-AFS determination. The results for the reference material of soil （serial number GBW-07411） agreed satisfactorily with the certified values. Results obtained by the developed procedure compared well with those after traditional acid digestion of samples. The detection limit are 6.7ngL-1 for Hg respectively, with average relative standard deviation values of 6.4% for analysis of a series of soil samples of different origin. The recoveries of the anatytes varied in the range from 95 to 107%. This observation has stimulated interest in fast, accurate and sensitive analytical methods for determination of metals in soil.展开更多
文摘为观察不同杀菌试验方法对同种消毒剂杀菌效果的差别,采用2002年版《消毒技术规范》规定的悬液定量杀菌试验和载体定量杀菌试验对一种复方醋酸氯己定消毒剂杀菌效果进行了比较。结果,用悬液定量杀菌试验,含醋酸氯己定4040 mg/L的该消毒液对金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌作用1.5 m in,其平均杀灭对数值均>5.00;对白色念珠菌作用1.5 m in,其平均杀灭对数值>4.00。用载体定量杀菌试验,用相同浓度消毒剂对金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌作用3 m in,其平均杀灭对数值>3.00;对白色念珠菌作用3 m in,其平均杀灭对数值>3.00。结论,两种定量杀菌试验评价同一复方醋酸氯己定消毒剂,其杀菌效果具有一定差别。
文摘为研究加热对双癸基二甲基氯化铵(一种双链季铵盐消毒剂)杀灭细菌芽孢的增效作用,采用悬液定量杀菌试验方法进行了实验室观察。结果,在常温(20℃)下,含双癸基二甲基氯化铵5000 mg/L的该双链季铵盐消毒液对枯草杆菌黑色变种芽孢基本无杀灭作用。将2500 mg/L该双链季铵盐消毒液加温至40℃作用120 m in,对枯草杆菌黑色变种芽孢杀灭对数值>3.0;加温至60℃作用30 m in,杀灭对数值>3.0。将1250 mg/L该双链季铵盐消毒液加温至80℃作用60 m in,对枯草杆菌黑色变种芽孢杀灭对数值>5.00。结论,双癸基二甲基氯化铵在常温20℃条件下不具有杀灭细菌芽孢作用,作用温度升到40℃以上即显示出杀灭细菌芽孢的效果,且随温度升高,杀灭芽孢速度加快。
文摘Ultrasonic aided slurry sampling hydride generation atomic fluorescence spectrometry （USS-HG-AFS） was developed for the determination of Hg in soil samples from a sewage-irrigated farm. 500 mg grounded soil was suspended in agar solution by an ultrasound water bath before the HG-AFS determination. The results for the reference material of soil （serial number GBW-07411） agreed satisfactorily with the certified values. Results obtained by the developed procedure compared well with those after traditional acid digestion of samples. The detection limit are 6.7ngL-1 for Hg respectively, with average relative standard deviation values of 6.4% for analysis of a series of soil samples of different origin. The recoveries of the anatytes varied in the range from 95 to 107%. This observation has stimulated interest in fast, accurate and sensitive analytical methods for determination of metals in soil.
