进口甘露醇标准中铅盐和镍盐具体操作方法

应助达人

老臣做不到啊！给您推荐个好地方去

我是英语小菜鸟啊。小臣各种搜，网上找不到啊。哪里是好地方？

冰山(yang_qingwen) 发表:老臣做不到啊！给您推荐个好地方去

应助达人

这里就是啊！楼主可以把相关的标准传上来，看大家手头是否刚好就有一份中文版？

馒头只是一坨面(v3032387) 发表:我是英语小菜鸟啊。小臣各种搜，网上找不到啊。哪里是好地方？

铅盐检查（附录2.4.10）
Limit Test for Lead in Sugars

(Ph. Eur. method 2.4.10)

Determine the lead by atomic absorption spectrometry (2.2.23, Method II).
Test solution  Dissolve 20.0 g of the substance to be examined in a mixture of equal volumes of dilute acetic acid R and water R and dilute to 100.0 mL with the same mixture of solvents. Add 2.0 mL of a clear 10 g/L solution of ammonium pyrrolidinedithiocarbamate R and 10.0 mL of methyl isobutyl ketone R and then shake for 30 s protected from bright light. （这句尤其不懂）Allow the layers to separate and use the methyl isobutyl ketone layer.
Reference solutions . Prepare 3 reference solutions in the same manner as the test solution but adding 0.5 mL, 1.0 mL and 1.5 mL respectively of lead standard solution (10 ppm Pb) R in addition to the 20.0 g of the substance to be examined.

Set the zero of the instrument using methyl isobutyl ketone R treated as described for the test solution without the substance to be examined. Measure the absorbance at 283.3 nm using a lead hollow-cathode lamp as source of radiation and an air- acetylene flame.

镍盐检查（附录2.4.15）
Limit Test for Nickel in Polyols

(Ph. Eur. method 2.4.15)

Determine the nickel by atomic absorption spectrometry (2.2.23, Method II).


Test solution? Dissolve 20.0 g of the substance to be examined in a mixture of equal volumes of dilute acetic acid R and water R and dilute to 100.0 mL with the same mixture of solvents. Add 2.0 mL of a saturated solution of ammonium pyrrolidinedithiocarbamate R (about 10 g/L) and 10.0 mL of methyl isobutyl ketone R and then shake for 30 s protected from bright light. Allow the layers to separate and use the methyl isobutyl ketone layer.


Reference solutions?. Prepare 3 reference solutions in the same manner as the test solution but adding 0.5 mL, 1.0 mL and 1.5 mL respectively of nickel standard solution (10 ppm Ni) R in addition to the 20.0 g of the substance to be examined.

Set the zero of the instrument using methyl isobutyl ketone R treated as described for preparation of the test solution omitting the substance to be examined. Measure the absorbance at 232.0 nm using a nickel hollow-cathode lamp as source of radiation and an air-acetylene flame.

这种时候才很深刻地体会，英语菜是多么的痛。。

Add of a clear 10 g/L solution ofammonium pyrrolidinedithiocarbamate R and 10.0 mL of methyl isobutyl ketone Rand then shake for 30 s protected from bright light.
加浓度为10 g/L之吡咯烷二硫代氨基甲酸铵R溶液2.0 mL和10.0 mL甲基异丁基酮R，然後摇勻30秒，其間不得受强光照射。
Reference :

pyrrolidine dithiocarbamate (PDTC)
http://dict.cnki.net/dict_result.aspx?searchword=ammonium%20%20pyrrolidinedithiocarbamate
吡咯烷二硫代甲酸铵
吡咯烷二硫代氨基甲酸铵

methyl isobutyl ketone
http://dict.cnki.net/dict_result.aspx?searchword=methyl%20isobutyl%20ketone
甲基异丁基酮
Remark :

clear不知如何译。 清？干凈？

谢谢您了啊。。clear我感觉是确切的之类的么，总之这个词应该不影响。

Clear可能解作透明、不混濁，隐喻已完全溶解或完全反应了的溶液。
Reference :
A solution can be colored (such as a blue copper sulfate solution)but it is always clear. Clear means that the solution is transparent, not cloudy, turbid, translucent, or opaque.
( http://employees.csbsju.edu/hjakubowski/classes/Chem%20and%20Society/Chemical_Reactions/olChemreactions.htm )
A solution can still contain color, but also be clear. Take a poolfor example, the water is slightly blue but you can still see through it. Acolorless solution is when there is no color, like water in a store boughtwater bottle.
( http://www.answers.com/Q/What_is_the_difference_between_a_clear_solution_and_a_colorless_solution_in_chemistry)