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首页> 外文期刊>Review of Scientific Instruments >Highly sensitive microwave temperature‐jump apparatus
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Highly sensitive microwave temperature‐jump apparatus

机译:高灵敏度微波跳温装置

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A temperature‐jump apparatus with repetitive microwave heating and spectrophotometric detection is described. Temperature jumps of 1.5°C are achieved in a flow microcell within 1.5 μs (two shorter heating times of 0.5 and 0.25 μs are also available) at a repetition rate up to 50 Hz. On‐line accumulation of the relaxation signals is performed with a PDP 11 processor, leading to very short recording times (more than 1000 signals accumulated in less than 50 s) and to a sensitivity better than 10-4 optical density (OD) units. Nonlinear identification treatment permits processing the summed signal even when it is strongly blurred by noise. To demonstrate the capabilities of our apparatus, highly shifted fast prototropic equilibria in aqueous solutions of pyrimidine base have been studied.
机译:描述了一种具有重复微波加热和分光光度检测的跳温装置。在流动微电池中,在1.5μs内实现1.5°C的温度跃变(还可以使用两个较短的0.5和0.25μs的较短加热时间),重复频率最高为50 Hz。松弛信号的在线累积是使用PDP 11处理器执行的,从而导致记录时间非常短(在不到50 s的时间内累积了1000多个信号),并且灵敏度优于10-4光密度(OD)单位。非线性识别处理即使在噪声严重模糊的情况下也可以处理求和信号。为了证明我们的仪器的功能,已经研究了嘧啶碱水溶液中的高位移快速质子平衡。

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