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【原创】翻译与改错(二)

专业英语

  • USP31版硬脂酸(Stearic Acid)翻译与改错
    原文:

    Stearic acid
    Octadecanoic acid.
    Stearic acid [57-11-4].
    » Stearic Acid is manufactured from fats and oils derived from edible sources and is a mixture of Stearic Acid (C18H36O2) and palmitic acid (C16H32O2). The content of C18H36O2 is not less than 40.0 percent, and the sum of the two is not less than 90.0 percent.
    NOTE—Stearic Acid labeled solely for external use is exempt from the requirement that it be prepared from edible sources.
    Packaging and storage— Preserve in well-closed containers.
    Labeling— If it is for external use only, the labeling so indicates.
    USP Reference standards 11 —
    USP Stearic Acid RS.
    USP Palmitic Acid RS .
    Congealing temperature <651>: not lower than 54 .
    Iodine value 401 : not more than 4. Proceed as directed in Method I except to use 35 mL of chloroform.
    Residue on ignition 281 : not more than 4 mg, determined on a 4-g portion (0.1%).
    Heavy metals, Method II 231 : 0.001%.
    Mineral acid— Shake 5 g of melted Stearic Acid with an equal volume of hot water for 2 minutes, cool, and filter: the filtrate is not reddened by the addition of 1 drop of methyl orange TS.
    Neutral fat or paraffin— Add 1 g of Stearic Acid to 30 mL of anhydrous sodium carbonate solution (1 in 60) in a flask, and boil the mixture: the resulting solution, while hot, shows not more than a faint opalescence.
    Organic volatile impurities, Method V 467 : meets the requirements.
    Solvent— Use dimethyl sulfoxide.
    (Official until July 1, 2008)
    Assay— Place about 100 mg of Stearic Acid in a small conical flask fitted with a suitable reflux attachment. Place about 50 mg of USP Stearic Acid RS and about 50 mg of USP Palmitic Acid RS in a similar flask. Treat each flask as follows. Add 5.0 mL of a solution prepared by dissolving 14 g of boron trifluoride in methanol to make 100 mL, swirl to mix, and reflux for 15 minutes or until the solid is dissolved. Cool, transfer the reaction mixture with the aid of 10 mL of chromatographic solvent hexane to a 60-mL separator, and add 10 mL of water and 10 mL of saturated sodium chloride solution. Shake, allow to separate, then drain and discard the lower, aqueous layer. Pass the hexane layer through 6 g of anhydrous sodium sulfate (previously washed with chromatographic solvent hexane) into a suitable flask. Using a syringe fitted with a suitable needle, introduce a 1-µL to 2-µL portion of the assay preparation (which contains the Stearic Acid) into a suitable gas chromatograph equipped with a flame-ionization detector. The column preferably is of glass, 1.5 m in length and 3 mm in inside diameter, and it is packed with 15% G4 on support S1A. The carrier gas is helium, passed through a bed of molecular sieve for drying, if necessary. The temperatures of the port and the detector are maintained at 210 , and the column temperature is maintained at 165 .
    System suitability— In a suitable chromatogram, the resolution factor, R (see Chromatography 621 ), is not less than 2.0 between the peaks from methyl palmitate and methyl stearate (located by comparison with the chromatogram of the standard preparation), and five replicate injections of a single sample show a coefficient of variation of not more than 1.5% in the percentage of methyl stearate and methyl palmitate, respectively. Measure the peak areas of the fatty acid esters in the chromatogram, and determine the percentage of C18H36O2 in the portion of Stearic Acid taken by the formula:
    100(A / B)
    in which A is the area due to the methyl stearate peak, and B is the sum of the areas of all of the fatty acid ester peaks in the chromatogram. Similarly, determine the percentage of C16H32O2.
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  • 影子

    第1楼2009/08/05

    » Stearic Acid is manufactured from fats and oils derived from edible sources and is a mixture of Stearic Acid (C18H36O2) and palmitic acid (C16H32O2). The content of C18H36O2 is not less than 40.0 percent, and the sum of the two is not less than 90.0 percent.
    硬脂酸是从食品级的植物油与矿物油中生产而成。是硬脂酸与棕榈酸的混合物。硬脂酸的含量应不低于40.0%,二者含量的总和应不低于90.0%。
    NOTE—Stearic Acid labeled solely for external use is exempt from the requirement that it be prepared from edible sources.
    备注:作为外用的硬脂酸不要求来源于食品级。

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  • 何当奇

    第2楼2009/08/05

    fat 与 oil里面能看到植物油和矿物油的说法吗?
    edible sources是 食品级? 可食用源都是食品级的吗?好像并不完全一样吧?

    heying斑竹的翻译,有些词省掉了,如solely,有些多出来了,如植物油和矿物油
    而实际上这个solely缺掉的话,意思就会有轻微的改变。尤其是在容易引起争议的时候

    hyheying 发表:» Stearic Acid is manufactured from fats and oils derived from edible sources and is a mixture of Stearic Acid (C18H36O2) and palmitic acid (C16H32O2). The content of C18H36O2 is not less than 40.0 percent, and the sum of the two is not less than 90.0 percent.
    硬脂酸是从食品级的植物油与矿物油中生产而成。是硬脂酸与棕榈酸的混合物。硬脂酸的含量应不低于40.0%,二者含量的总和应不低于90.0%。
    NOTE—Stearic Acid labeled solely for external use is exempt from the requirement that it be prepared from edible sources.
    备注:作为外用的硬脂酸不要求来源于食品级。

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  • 影子

    第3楼2009/08/05

    是不是应该译成“脂肪和油”?edible sources以及后面一句应该怎样译才会更贴切呢?

    redanqi 发表:fat 与 oil里面能看到植物油和矿物油的说法吗?
    edible sources是 食品级? 可食用源都是食品级的吗?好像并不完全一样吧?

    heying斑竹的翻译,有些词省掉了,如solely,有些多出来了,如植物油和矿物油
    而实际上这个solely缺掉的话,意思就会有轻微的改变。尤其是在容易引起争议的时候

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  • 何当奇

    第4楼2009/08/06

    把labeled solely加上去就行了。 标识仅用于....

    hyheying 发表:是不是应该译成“脂肪和油”?edible sources以及后面一句应该怎样译才会更贴切呢?

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  • 影子

    第5楼2009/08/06

    继续:
    Packaging and storage— Preserve in well-closed containers.
    包装与贮存:贮存在密闭容器中。
    Labeling— If it is for external use only, the labeling so indicates.
    标签:如果仅仅作为外用,标签上应指明。
    Congealing temperature 651 : not lower than 54 .
    凝点<651> : 不低于54°。

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  • 影子

    第6楼2009/08/06

    Iodine value 401 : not more than 4. Proceed as directed in Method I except to use 35 mL of chloroform.
    碘值<401> : 不超过4。除了使用35ml的氯仿外,其余完全按方法I进行操作。
    Residue on ignition 281 : not more than 4 mg, determined on a 4-g portion (0.1%).
    炽灼残渣<281>: 取4g样品,测得的残留物重量不超过4mg。
    Heavy metals, Method II 231 : 0.001%.
    重金属 Method II <231>: 0.001%。

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  • 影子

    第7楼2009/08/06

    Mineral acid— Shake 5 g of melted Stearic Acid with an equal volume of hot water for 2 minutes, cool, and filter: the filtrate is not reddened by the addition of 1 drop of methyl orange TS.
    水溶性酸:取硬脂酸5g,加等体积的热水熔化,振摇2分钟,放冷,滤过,滤液加甲基橙指示液1滴,不得显红色。

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  • 影子

    第8楼2009/08/06

    Neutral fat or paraffin— Add 1 g of Stearic Acid to 30 mL of anhydrous sodium carbonate solution (1 in 60) in a flask, and boil the mixture: the resulting solution, while hot, shows not more than a faint opalescence.
    中性脂肪或蜡:取硬脂酸1g,加入已装有30mL无水碳酸钠溶液(1:60)的烧瓶中,加热煮沸,产生的溶液在加热时不显示浑浊。
    PS:药典中规定,如果没有特别说明,溶液即是指水溶液,不知道这里为什么说成是无水碳酸钠溶液?另外,opalescence在这里是什么意思?

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  • 何当奇

    第9楼2009/08/06

    无机酸与水溶性酸是对等的吗?

    hyheying 发表:Mineral acid— Shake 5 g of melted Stearic Acid with an equal volume of hot water for 2 minutes, cool, and filter: the filtrate is not reddened by the addition of 1 drop of methyl orange TS.
    水溶性酸:取硬脂酸5g,加等体积的热水熔化,振摇2分钟,放冷,滤过,滤液加甲基橙指示液1滴,不得显红色。

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  • 影子

    第10楼2009/08/06

    你说得对,应该是无机酸。这段话前面部分不是直译的,这样译可以吗?有没有更好的建议?

    redanqi 发表:无机酸与水溶性酸是对等的吗?

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