主题：【原创】药典内容中英互译第一期

药典内容互译活动今天推出第一期：中译英。考虑到大家可能没有过多的时间来参与活动，我们不要求对整段进行翻译，可选取其中的某一部分，会多少译多少，根据翻译的质量及专业程度进行加分奖励，也可以对他人的译文进行修改与完善。
中文原文：
中国药典2005版附录VIII A 氯化物检查法

除另有规定外，取各品种项下规定量的供试品，加水溶解使成25ml(溶液如显碱性，可滴加硝酸使成中性)，再加稀硝酸10ml；溶液如不澄清，应滤过；置50ml纳氏比色管中，加水使成约40ml，摇匀，即得供试溶液。另取该品种项下规定量的标准氯化钠溶液，置50ml纳氏比色管中，加稀硝酸10ml，加水使成40ml，摇匀，即得对照溶液。于供试溶液与对照溶液中，分别加入硝酸银试液1.0ml，用水稀释使成50ml，摇匀，在暗处放置5分钟，同置黑色背景上，从比色管上方向下观察、比较，即得。

供试溶液如带颜色，除另有规定外，可取供试溶液两份，分置50ml纳氏比色管中，一份中加硝酸银试液1.0ml，摇匀，放置10分钟，如显浑浊，可反复滤过，至滤液完全澄清，再加规定量的标准氯化钠溶液与水适量使成50ml，摇匀，在暗处放置5分钟，作为对照溶液；另一份中加硝酸银试液1.0ml与水适量使成50ml，摇匀，在暗处放置5分钟，按上述方法与对照液比较，即得。

标准氯化钠溶液的制备：称取氯化钠0.165g，置1000ml量瓶中，加水适量使溶解并稀释至刻度，摇匀，作为贮备液。临用前，精密量取贮备液10ml，置100ml量瓶中，加水稀释至刻度，摇匀，即得(每1ml相当于10μg的Cl)。

【附注】用滤纸滤过时，滤纸中如含有氯化物，可预先用含有硝酸的水溶液洗净后使用。

下面是网上的翻译版本,不知道是不是官方的:
VIII A Limit Test for Chlorides

Test preparation    Unless otherwise specified, weigh a quantity of the substance being examined as prescribed under individual monographs, dissolve it in about 25 ml of water (if the solution is alkaline, neutralize with nitric acid dropwise). Add 10 ml of dilute nitric acid and filter if necessary, transfer the solution to a 50 ml Nessler cylinder, add water to produce 40 ml and mix well.
Reference preparation    Transfer a volume of sodium chloride standard solution as prescribed under individual nonographs to a 50 ml Nessler cylinder, add 10 ml of dilute nitric acid and sufficient water to produce 40 ml, mix well.
Procedure    To each of the Nessler cylinders described above add 1.0 ml of silver nitrate TS, dilute with water to 50 ml and mix well. Allow to stand in the dark for 5 minutes, compare the opalescence produced by viewing down the vertical axis of the cylinders against a black background.
If the test preparation is coloured, unless otherwise specified, place two aliquots of the preparation in Nessler cylinders separately, to one cylinder add 1.0 ml of silver nitrate TS, mix and allow to stand for 10 minutes, filter the content of the cylinder repeatedly until the filtrate is perfectly clear, then add the prescribed volume of standard sodium chloride solution to the filtrate, use it as the reference preparation. To the other cylinder add 1.0 ml of silver nitrate TS, use it as the test preparation. Dilute the test preparation and the reference preparation with water to 50 ml, mix well and allow to stand in the dark for 5 minutes, compare the opalescence as described above.
Sodium chloride standard solution    Dissolve 0.165 g of sodium chloride in water in a 1000 ml volumetric flask, and dilute to the volume, mix well (stock solution). Transfer 10 ml of the stock solution, accurately measured, into a 100ml volumetric flask immediately before use, dilute with water to the volume and mix well (each ml is equivalent to 10μg of Cl).
Annotations    The filter paper used in this test, if necessary, should be previously washed with water containing nitric acid until the washing is free from chlorides.
2009.09.10