251 lead The imposition of stringent limits on the amounts of lead that may be present in pharmaceutical products has resulted in the use of two methods, of which the one set forth following depends upon extraction of lead by solutions of dithizone.

DILUTED STANDARD LEAD SOLUTION—Dilute an accurately measured volume of Standard Lead Solution (see Heavy Met-essary, and add 2 mL of Potassium Cyanide Solution. Imme-als 〈231〉) [containing 10 µg of lead per mL], with 9 diately extract the solution with 5 …

铅(USP35 251)中文翻译-供试品——[注意：如果在下述制备过程中，待测产品反应过快，并且在加热之前加入5mL硫酸时即开始炭化，那么使用10mL冷却的稀硝酸（50%）代替，并在加热前加入几滴双氧水。

2012年6月10日 · Remove any lead that may be present by extracting the solution with 20-mL portions of Dithizone Extraction Solution (see below), until the dithizone solution retains its orange-green color. diluted standard lead solution— Dilute an accurately measured volume of Standard Lead Solution (see Heavy Metals 231) [containing 1 0 µg of lead per mL ...

2018年4月12日 · 251 lead 美国药典USP41-NF36 下载 ... that of the solution from the Standard Preparation.á251ñ LEADThe imposition of stringent limits on the amounts of lead that may be present in pharmaceutical products has resulted in theuse of two methods, of which the one set forth in this chapter depends upon extraction of lead by solutions of ...

〈251〉 Lead The imposition of stringent limits on the amounts of lead that may be present in pharmaceutical products has resulted in the use of two methods, of which the one set forth in this chapter depends upon extraction of lead by solutions of dithizone.

DILUTED STANDARD LEAD SOLUTION— Dilute an accurately measured volume of Standard Lead Solution (see Heavy Metals á231ñ)[containing 10µg of lead per mL],with 9volumes of dilute nitric acid (1in 100)to obtain a solution that contains 1µg of lead per mL.

2023年6月1日 · 251> LEAD. Errata Identifier . c0fb0dc3-b719-45ce-acdc-1b853e6504ff. In Analysis: Change Add to the acid solution 5.0 mL of Standard dithizone solution and 4 mL of Ammonia cyanide solution, to: Add ...

<251> LEAD - 2023-06-01 Monograph Title LEAD Errata Identifier c0fb0dc3-b719-45ce-acdc-1b853e6504ff In Analysis: Change Add to the acid solution 5.0 mL of Standard dithizone solution and 4 mL of Ammonia cyanide solution, to:

2023年2月6日 · USP2021 〈251〉 LEAD.pdf,蒲公英 - 制药技术的传播者 GMP理论的实践者