主题：【求助】分析方法中译英

楼主自己先翻译一下吧，然后大家帮你修改

原文由 ruojun 发表:
楼主自己先翻译一下吧，然后大家帮你修改

好吧.

Dissolve 40.0 g of sample in carbon-dioxide free water.  Allow to cool.  Transfer this solution to a 1000ml volumetric flask and dilute to mark with the same water. Lable the solution as solution A.  Pipet the solution A 20ml to a 500ml volumetric flask and dilute to the mark with the same water.  Further pipet 20ml to a 100ml beaker, add 1 drop of methyl red indicator, then add acetic acid until the solution remains light-red.  After heating the solution to 40ºC, 8-9ml of 0.1mol/L sodium tetraphenylborate -ethanol solution is dropwise added with agitating in 5 minutes.  After addition, allow to stand for 10 minutes.  Filter the mixture with a G4 glass crucible previously dried in a 115-125ºC oven until a constant weight was obtained.  Wash the filter cake 8-10 times with each 5-ml potassium tetraphenylboron saturated solution.  Then wash the filter cake once with 2ml of anhydrous ethanol.  Dry the crucible in a 115-125ºC oven until a constant weight obtained.

用称量瓶迅速称取样品40g，溶解于新煮沸并冷却的水中，冷却，移入1000ml容量瓶中，用新煮沸并冷却的水稀释至刻度，摇匀，作为溶液甲。
Weigh 40g sample (with weighing vial) promptly and dissolve it into freshly boiled and cooled water. Let  the solution cool down and transfer it to a 1000ml volumetric flask. Added to volume with freshly boiled and cooled water, mixed, then used as solution A.

Dissolve (+ rapidly) 40.0 g of sample in carbon-dioxide free (or cool fresh-boiled) water. Allow to cool (+ down). Transfer this solution to a 1000ml volumetric flask and dilute to mark with the same water. Lable (应为Label) the solution （可以去掉） as solution A. Pipet the solution A 20ml （Pipet 20 ml of solution A） to a 500ml volumetric flask and dilute to the mark with the same water. （少了一句） Further pipet 20ml (+ the above solution) to a 100ml beaker, add 1 drop of methyl red indicator, then add acetic acid until the solution remains light-red. After heating the solution to 40ºC, 8-9ml of 0.1mol/L sodium tetraphenylborate -ethanol solution is dropwise added with agitating in （ within ）(c.)5 minutes. (前面主动，这里被动，似乎不是很和谐。尽量保持一致吧，很多时候我也犯同样的错误) After addition, (“then” is enough) allow to stand for 10 minutes. Filter the mixture with a G4 glass crucible previously dried in a 115-125ºC oven （这个句中没有） until a constant weight was obtained (“until constant weight” is enough). Wash the filter cake （好像都用sediment） 8-10 times with each 5-ml potassium tetraphenylboron saturated solution. (Wash the sediment using 40-50 ml of otassium tetraphenylboron saturated solution at 8- 10 times).  Then wash the filter cake once ( one time) with 2ml of anhydrous ethanol. Dry the crucible in a 115-125ºC oven until a constant weight obtained. (or “dry to constant weight at 120±5℃)

楼主的翻译基本上算是很不错的。再接再厉吧！

Dissolve (+ rapidly) 40.0 g of sample in carbon-dioxide free (or cool fresh-boiled) water
为何新煮沸并冷却的水是carbon-dioxide free water,后者是不含二氧化碳的水，煮沸的未必不含一点二氧化碳吧，尤其是冷却后，二氧化碳还会溶解一些的。？？

As metrology is one of my routine jobs, I am very sensitive to the figures.  I wonder why “取样品40g” was translated as 40.0g.

“boiled and cooled water” seems to be more common than “cool fresh-boiled” as I found about 17300 results in google when searching with the key words “boiled and cooled”, water.  (1150 results with the key words "boiled then cooled", water)

I do not understand the chemical theory behind the procedure of “加入1滴甲基红指示剂，用乙酸调至微红色”.  Does it mean that “Continuously add 乙酸 until the solution becomes light-red” or “Continuously add 乙酸 as far as the solution remains light-red” ?

原文由 poorlittle 发表:
I do not understand the chemical theory behind the procedure of “加入1滴甲基红指示剂，用乙酸调至微红色”.  Does it mean that “Continuously add 乙酸 until the solution becomes light-red” or “Continuously add 乙酸 as far as the solution remains light-red” ?

the former is the right one.

原文由 ruojun 发表:
Dissolve (+ rapidly) 40.0 g of sample in carbon-dioxide free (or cool fresh-boiled) water
为何新煮沸并冷却的水是carbon-dioxide free water,后者是不含二氧化碳的水，煮沸的未必不含一点二氧化碳吧，尤其是冷却后，二氧化碳还会溶解一些的。？？

据我所知，通常分析是这么认为的。有时候煮沸就是为了去除水中的二氧化塔