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    • 13. 发明授权
    • Non-dispersive mid-infrared sensor for vaporized hydrogen peroxide
    • 用于汽化过氧化氢的非色散中红外传感器
    • US06875399B2
    • 2005-04-05
    • US10142678
    • 2002-05-10
    • Iain F. McVey
    • Iain F. McVey
    • A61L2/20A61L2/24A61L2/28A61L2/00
    • A61L2/208A61L2/24A61L2/28A61L2202/122A61L2202/14A61L2202/21A61L2202/24
    • A sterilization system (14) includes a sensor (10) for detection of a component, such as hydrogen peroxide vapor, in a multi-component vapor, such as a mixture of vapor hydrogen peroxide and water supplied to a chamber (12) of the system. The sensor preferably uses a wavelength range in which hydrogen peroxide strongly absorbs but other components of the vapor, such as water, do not. A suitable wavelength for detection of hydrogen peroxide is from about 7500 to about 8400 nm, since there is little absorption by water in this range. This avoids the need to use complex subtraction procedures normally used to remove the contribution of water from detected absorbance measurements. A control system (16, 30) controls operating conditions of the sterilization system, such as a heater (82), pressure release valves (74), vaporization rate of hydrogen peroxide by a vaporizer (22), and the like to maintain optimum sterilization conditions within the chamber.
    • 灭菌系统(14)包括用于检测诸如过氧化氢蒸汽的组分的传感器(10),所述多组分蒸汽例如是蒸气过氧化氢和供应到所述室的所述室(12)的混合物的混合物 系统。 传感器优选使用其中过氧化氢强吸收的波长范围,但是诸如水的蒸气的其它组分不是。 用于检测过氧化氢的合适波长为约7500至约8400nm,因为在该范围内几乎没有水的吸收。 这避免了使用通常用于从检测到的吸光度测量中去除水的贡献的复杂减法程序的需要。 控制系统(16,30)控制诸如加热器(82),压力释放阀(74),蒸发器(22)的过氧化氢蒸发速率等灭菌系统的操作条件等,以保持最佳灭菌 房间内的条件
    • 14. 发明授权
    • Durable carbon electrode
    • 耐用碳电极
    • US06592730B1
    • 2003-07-15
    • US09499479
    • 2000-02-07
    • Daniel N. KelschIain F. McVeyJan J. Lewandowski
    • Daniel N. KelschIain F. McVeyJan J. Lewandowski
    • G01N2726
    • A61L2/186A61L2202/11
    • An electrochemical analysis system includes a chamber (34) that defines a fluid receiving reservoir therein. A working electrode (40), a reference electrode (42), and a counter electrode (44) is mounted to the chamber. An electrochemical analysis circuit (38) applies appropriate voltages to the electrodes and reads appropriate currents from the electrodes to provide an indication of the peroxyacetic acid concentration in a sample. The working electrode includes a glassy carbon rod (60) which is surrounded by a compressible polymeric sleeve (64) and a metal sleeve (66). One end of the metal sleeve is swaged (68) to form a fluid tight compression seal with the insulating sleeve and the glassy carbon rod. An electrically conductive thermal extension joint between the glassy carbon rod and an electrically conductive rod (70) includes a bore (72) in the conductive rod in which the glassy carbon rod is slidably received and a compressed spring (74) in the bore.
    • 电化学分析系统包括在其中限定流体接收容器的腔室(34)。 工作电极(40),参比电极(42)和对电极(44)安装在腔室上。 电化学分析电路(38)对电极施加适当的电压并从电极读取合适的电流以提供样品中过氧乙酸浓度的指示。 工作电极包括由可压缩聚合物套筒(64)和金属套筒(66)包围的玻璃碳棒(60)。 金属套筒的一端被锻压(68)以与绝缘套管和玻璃碳棒形成流体密封的压缩密封。 玻璃碳棒和导电棒(70)之间的导电热延伸接头包括导电棒中的孔(72),玻璃碳棒可滑动地容纳在孔中,孔中的压缩弹簧(74)。
    • 19. 发明授权
    • Infrared monitor and control for vapor hydrogen peroxide processing techniques
    • 蒸汽过氧化氢加工技术的红外监测和控制
    • US07157045B2
    • 2007-01-02
    • US10191821
    • 2002-07-09
    • Iain F. McVey
    • Iain F. McVey
    • A61L2/24
    • A61L2/208A61L2/24A61L2/28A61L9/02A61L2202/122A61L2202/14G01N21/3504G01N33/006G01N2021/3148
    • A vaporizer (14) supplies hydrogen peroxide and water vapor to a high level disinfection or sterilization region (20). Mid-infrared light detectors (32) detect light in the mid-infrared range which has traversed a region of the treatment chamber in a first narrow spectrum centered at 8,000 nanometers which is absorbed by the hydrogen peroxide vapor, a second narrow spectrum which is absorbed by the water vapor, and a third spectrum that is absorbed by neither the hydrogen peroxide vapor nor the water vapor. From these measurements, an absorbance or transmittance is determined (40) from which the concentrations of hydrogen peroxide and water vapor are determined (42). Monitored temperature (44) and the determined concentrations are converted into a percent saturation (54). The supply of hydrogen peroxide and water vapor to the chamber is controlled (60) in accordance with the determined percent saturation.
    • 蒸发器(14)将高压消毒或灭菌区域(20)供应过氧化氢和水蒸气。 中红外光检测器(32)检测在中心红外范围内的光,该中心红外范围已经穿过处理室的区域,该第一狭窄光谱以8,000纳米为中心,其被过氧化氢蒸气吸收,第二窄光谱被吸收 通过水蒸汽和不被过氧化氢蒸气和水蒸汽吸收的第三光谱。 从这些测量中,确定吸光度或透射率(40),从中确定过氧化氢和水蒸气的浓度(42)。 监测温度(44)和确定的浓度转化为饱和百分比(54)。 根据确定的饱和百分比控制向室内供应过氧化氢和水蒸汽(60)。