ISO 22412:2017 粒度分析 动态光散射（DLS）

标准编号：ISO 22412:2017

中文名称：粒度分析 动态光散射（DLS）

英文名称：Particle size analysis — Dynamic light scattering (DLS)

发布日期：2017-02

标准范围

ISO 22412:2017规定了动态光散射（DLS）在测量平均流体动力颗粒尺寸和测量主要分散在液体中的亚微米级颗粒、乳液或细气泡的尺寸分布方面的应用。DLS也被称为“准弹性光散射（QELS）”和“光子相关光谱（PCS）”，尽管PCS实际上是测量技术之一。ISO 22412:2017适用于各种稀释和浓缩悬浮液的测量。浓缩悬浮液的动态光散射原理与稀释悬浮液相同。然而，对于浓缩悬浮液，需要对仪器设置和试样制备规范提出具体要求。在高浓度下，颗粒-颗粒相互作用和多重光散射可能占主导地位，并可能导致浓缩悬浮液和稀释悬浮液的表观颗粒尺寸不同。

ISO 22412:2017 specifies the application of dynamic light scattering (DLS) to the measurement of average hydrodynamic particle size and the measurement of the size distribution of mainly submicrometre-sized particles, emulsions or fine bubbles dispersed in liquids. DLS is also referred to as "quasi-elastic light scattering (QELS)" and "photon correlation spectroscopy (PCS)," although PCS actually is one of the measurement techniques.ISO 22412:2017 is applicable to the measurement of a broad range of dilute and concentrated suspensions. The principle of dynamic light scattering for a concentrated suspension is the same as for a dilute suspension. However, specific requirements for the instrument setup and specification of test sample preparation are required for concentrated suspensions. At high concentrations, particle-particle interactions and multiple light scattering can become dominant and can result in apparent particle sizes that differ between concentrated and dilute suspensions.

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