Study on Methods for Particle Size Analysis of Sediment Samples
Study on Methods for Particle Size Analysis of Sediment Samples
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发表时间：
2011
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通讯作者：
Pan Zhong-xi
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作者：
Pan Zhong-xi
激光粒度分析技术在沉积物领域的应用近年来得到了发展。样品的重量和稀释等因素影响激光粒度分析的测量结果。对于Micro S3500，样品的最佳重量为0.2 g左右。如果稀释，不同的采样方法会产生不同的随机误差，与粒度分布参数相比，激光粒度分析仪测定的平均粒度、标准差、偏度和峰度均小于图像法和筛分法，但峰度与图像法和筛分法有较好的相关性，根据Micro S3500和马尔文2000两种激光粒度分析仪对30个样品的测量结果，Micro S3500粒度分析仪测得的平均粒度值大于马尔文2000粒度分析仪测得的平均粒度值，两者之间存在着良好的线性相关性（r=0.9574），两种粒度分析仪测得的粒度值存在系统性差异，不同的粒度分析方法存在一定的局限性和差异，为了比较不同文献的数据，应采用相同的方法进行粒度数据的分析。
The applications of Laser particle size analysis in sediment fields have been developed in recent years.Some factors such as the weight of the sample and dilution affect the measurement result of laser particle size analysis.For Micro S3500,the optimum weight of a sample is about 0.2 grams.If diluted,it affects the result of the particle size distribution.The method of sampling causes different random errors.Compared to the particle size distribution parameters(average size,standard deviation,skewness and kurtosis),the results obtained by laser analyzer show a smaller average size than the image method and sieving method.However,a good correlation for kurtosis was observed between the laser method and sieving method.According to the measurement results of 30 samples with two types of laser size analyzers of Micro S3500 and Malvern 2000,the average size obtained by Micro S3500 was bigger than that by Malvern 2000 with a good linear correlation(r=0.9574).In summary,results from the two analyzers provided a systemic difference in grain size.There are limitations and differences between every size analysis method.The particle size data should be obtained and analyzed by the same method in order to compare data from different references.