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Precision of a splitting device for water samples

Open-File Report 95-293

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Abstract

Two identical cone splitters, devices designed to split water and its suspended solids into equal aliquots for semi-volatile organic chemical and trace element analyses, were evaluated for their precision. The water-splitting evaluations consisted of experiments to test the effect of water volume, the effect of combining outlet ports, and the effect of different techniques of water introduction. The solids-splitting evaluations consisted of experi- ments to test the effect of particle size (nine different particle diameters ranging from very coarse sand to clay) and suspended-solids concentration. In general, water was equally split with a precision of less than 5 percent relative standard deviation. The accuracy of splitting the solids was a function of particle size. Clay, silt, and fine and medium sand were split with a precision relative standard deviation of less than 7 percent, and coarse sand was split with a relative standard deviation between 12 and 45 percent.

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Precision of a splitting device for water samples
Series title:
Open-File Report
Series number:
95-293
Year Published:
1995
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Sacramento, CA
Contributing office(s):
Minnesota Water Science Center
Description:
iv, 6 p.
Online Only (Y/N):
N
Additional Online Files (Y/N):
N