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应使用哪种方法来测量粒度分布?
Question (EN)
Which method should be used for measurement of particle size distribution?
中文内容由 Google Cloud Translation 自动生成,仅供参考;请以英文原文为准。问答资料来自欧盟化学品管理局(ECHA)官方网站。
答案(中文)
REACH 附件 VI 的法律要求是报告基于数量的粒度分布,并标明 1-100 纳米尺寸范围内组成颗粒的数量分数。您可以自由选择测量方法,只要满足数据要求即可。我们建议至少使用一种电子显微镜技术。如果激光衍射可以提供该信息,则可以使用它。在许多情况下,情况可能并非如此。在确定组成颗粒的数量分数时,必须考虑所有测量的颗粒。
Answer (EN)
The legal requirement under Annex VI of REACH is to report the number-based particle size distribution with indication of the number fraction of constituent particles in the size range within 1-100 nm. You are free to choose the measurement method as long as the data requirement is fulfilled. We recommend using at least one electron microscopy technique.
If laser diffraction can provide that information, it can be used. In many cases, this may not be the case. All the measured particles must be taken into consideration when the number fraction of constituent particles is determined.