poorlittle
第5楼2008/09/23
Please check your original against the one at http://lib.njutcm.edu.cn/yaodian/ep/EP5.0/02_methods_of_analysis/2.2.__physical_and_physicochemical_methods/2.2.16.%20Melting%20point%20-%20instantaneous%20method.pdf
qingtian1210
第7楼2008/09/26
谢谢poorlittle,我回去证实了一下,确实是弄错了,由于欧洲药典不能直接复制,所以变成word版本时出了点问题。呵呵。难怪这块翻译不明白了,现在顺畅多了。
2.2.16. MELTING POINT -INSTANTANEOUS METHOD
The instantaneous melting point is calculated using the expression:(t1+t2)/2
in which t is the first temperature and t the second temperature read under the conditions stated below.
Apparatus. The apparatus consists of a metal block resistant to the substance to be examined, of good heat-conducting capacity, such as brass, with a carefully polished plane upper surface. The block is uniformly heated throughout its mass by means of a micro-adjustable gas heater or an electric heating device with fine adjustment. The block has a cylindrical cavity, wide enough to accomodate a thermometer, which should be maintained with the mercury column in the same position during the calibration of the apparatus and the determination of the melting point of the substance to be examined. The cylindrical cavity is parallel to the upper polished surface of the block and about 3 mm from it. The apparatus is calibrated using appropriate substances of known melting point.
2.2.16 熔点的测定----瞬间法
瞬间熔点是用(t1+t2)/2 这个公式计算的。公式中的t1是下面规定操作中的第一个温度读数,t2是第二个。
装置------包括一个不与待测物质反应的有好的热传导能力的金属块,例如铜锌合金,其上表面是一个小心被擦亮的平面。该金属块借助一个可微调的煤气加热器或有微调的电热装置进行均匀透彻地加热。金属块有一个圆筒状的洞,宽度足以容纳一个温度计,在校准该装置和测定待测物质的熔点时~~~将会和汞柱保持在同一个位置上。这个圆柱状的洞与金属块的上面的磨光面相平行,大约距离3mm。装置使用一个已知熔点的合适物质去校准。
我对上面又简单整理了一下,英语水平实在差,所以~~~见谅。还是希望大家多多帮忙。
1.上面的which,我特意用红色表示出来,我不知道它指代的是哪个东西,感觉校准装置和测定样品熔点时温度计伸进洞里的长度应该是一样的,但是还有一个东东,就是那个which,也是保持着校准和测定的相同位置。
2.对该装置我考虑后理解是一个加热的金属块,样品颗粒可以放在上面,观察其熔化的状态,该金属块的侧面有一个洞,该洞与上表面平行且相距3mm。温度计的校准同样品的测定类似。感觉自己想明白这个装置的样子了,不知道其他战友是如何理解的,欢迎指教。
happyjyl
第8楼2008/09/26
你的英语挺好的。我的理解跟你差不多,可惜我也没见到过这样的装置。我在网上找到另一段话,可以证实你的猜测,即金属块上是有一个圆柱形的腔,腔(底部)与金属块的上表面平行,且相距3mm。见下:
The block has a cylindrical cavity parallel to and about 3 mm below its upper polished surface, of suitable dimensions to accommodate the thermometer, such that the mercury column is in the same position during calibration of the apparatus and the determination.