Grain-size analysis by laser diffractometry: comparison with the sieve-pipette method
Grain-size analysis by laser diffractometry: comparison with the sieve-pipette method
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DOI：
10.1016/s0341-8162(98)00051-4
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发表时间：
1998-06-01
期刊：
影响因子：
6.2
通讯作者：
Degraer, G
中科院分区：
文献类型：
--
作者：
Beuselinck, L;Govers, G;Degraer, G
将用于粒度分析的传统沉降技术（筛移管法）的结果与激光衍射粒度分析仪（Coulter LS-100）的结果进行比较，并使用磨碎的石英样品和粉质土壤样品来研究颗粒形状的影响。除砂粒部分外，Coulter LS-100 的重现性优于筛移液法。对于研磨石英样品，两种方法之间的一致性最强。 Coulter LS 100 低估了粉质土壤样品的粘土含量，并且通常高估了研磨石英样品的粘土含量。这表明颗粒形态的重要性。磨碎的石英颗粒非常有棱角并且有些拉长，而粉质土壤样品的粘土部分中的粘土矿物通常具有板状形状。计算简化的长轴关系，可用于将 Coulter LS-100 结果转换为筛移液管法的结果。百分位数大小数据的相关性最强。 Coulter LS-100 低估了粘土，但正确估计了 和 分数。这导致两种技术测量的总淤泥分数之间的关系较弱。因此，提出了一种替代方法来估计该分数。我们的数据与已发表的数据和关系的比较表明，只要样品的粘土矿物学相似，校准关系就相当稳健。 (C) 1998 Elsevier Science B.V. 保留所有权利。
Results of a traditional sedimentation technique for grain-size analysis (the sieve-pipette method) were compared with those of a laser diffraction grain-size analyser, the Coulter LS-100, Milled quartz samples and silty soil samples were used to investigate the effect of particle shape. The reproducibility of the Coulter LS-100 was better than that of the sieve-pipette method, except for the sand fraction. The agreement between the two methods is strongest for the milled quartz samples. The Coulter LS 100 underestimated the clay content of the silty soil samples and generally overestimated the clay content of the milled quartz samples. This indicates the importance of particle morphology. The milled quartz grains are very angular and somewhat elongated whereas the clay minerals in the clay fraction of the silty soil samples usually have a platy shape. Reduced major axis relationships are calculated which may be used to convert Coulter LS-100 results to those of the sieve-pipette method. Correlation is strongest for percentiles size data. The Coulter LS-100 underestimates the clay, but correctly estimates the and fraction. This results in a weak relationship for the total silt fraction as measured by the two techniques. Therefore, an alternative method is proposed for estimating this fraction. A comparison of our data with published data and relationships suggests that the calibration relationships are quite robust as long as the clay mineralogy of the samples is similar. (C) 1998 Elsevier Science B.V. All rights reserved.