BCEIA分析技术与仪器评议报告--一种氙灯紫外-可见分光光度计

                 一种氙灯紫外-可见分光光度计——CARY 50

    BCEIA^99展览会上，美国瓦里安（Varian）公司推出的该公司1997年下半年问世的CARY 50型紫外-可见分光光度计，具有经济实用、操作简便、性能优异等特点，结合功能强劲的CARY WINUV软件和各种CARY附件，可满足生物化学、医药工业、光学测量和材料科学的各种应用。
CARY 50 紫外-可见分光光度计与同类仪器相比明显的特点是：
最大扫描速率达24000 nm/min，对190~1100 nm整个波长范围全扫描仅需3秒钟。
80次/秒的数据采集速度提高了定量的准确性，改善了峰形，十分有利于动力学研究。
线性范围宽，可以测量到3Abs，对一般样品不需要稀释。
采用高科技氙灯
    氙灯可生成非常窄的聚焦光束，因此可提高信噪比，增加准确度。亦可直接检测小至5μL的微量池中的样品。氙灯只在扫描时闪烁，无须预热，光源寿命可延长至2万小时。即使长时间工作，闪烁的光源亦不会分解光敏感样品。
    具有不受环境限制的仪器性能。在检测样品时不受日光的干扰，即使不盖上样品保护盖，也不会影响检测结果。
独特的光纤测量模式，最大程度地简化了样品的前处理工作。
    另外，CARY WINUV 软件是以WINDOW 32为基础设计的，具有多任务操作，文件重组，窗口操作，提示文本，作图工具等特性。CARY 50型紫外-可见分光光度计可提供浓度模式、扫描模式、生化模式以及动力学模式四种不同的软件包，亦可配合使用各种CARY 附件（例如，PCB-150水浴、快速混合、光纤探头、固体样品支架等），从而大大拓宽了仪器的使用范围。

Advantages of CARY 50 UV-Vis Spectrophotometer

Abstract
     By incorporating a Xenon flash lamp, the Cary 50 UV-Vis Spectrophotometer (Varian, America) offers advantages over traditional UV-Vis Spectrophotometer:
     The maximum scan rate is 24000 nm/min. That means the whole wavelength range of 190~1100nm can be scanned in less than 3 seconds.
     With a data collection rate of an impressive 80 points per second all the information needed about kinetics assay can be obtained.
     The samples can be measured up to 3 Abs so it is not necessary to dilute as often.
     The Xenon lamp has a very long lifetime-3×109 flashes actually. This means that even if you measure continuously, 7days per ,the lamp will last at least one year. That makes the CARY 50 very cheap to run. The light beam is narrow and very intense ,so even if microcells with a small aperture are used the excellent noise performance will be gotten.
     The CARY 50 is unaffected by room light. You can operate with the sample compartment open or closed, you will not notice the difference.
    The fiber optic dip probe allows the user to dip a measuring probe into any vessel and initiate the reading from the built-in switch in the probe.