Managing Sieve Analysis Separations (Sample Splitting)

Applies to QEST Web App

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Separation Sieve(s)

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This field shows the sieves where separations have been added. It is a read-only field that will show “None”, or a default value, depending on the test method requirements, when first viewed.

It is updated if the separation settings are modified by pressing the Manage Separations button.

Managing Separations

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Samples that require size reduction, for splitting the sieving over smaller sieve set sizes, can be accommodated through the introduction of separations to the sieving procedure.

In the QEST Web App this is handled through a process referred to as Manage Separations.

When the Manage Separations button is clicked the following appears:

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Clicking the Separate button divides the Sieve Portion into two parts:

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The default separation size can vary based on the test procedure, here it is 20.0 mm. The dropdown list allows other separation sizes to be selected.

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A second separation can be added if required. When there is more than one Separate button present, clicking one of them will separate the portion that it appears next to.

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On completion of the Manage Separations process, new Sieving and Separation sections are added to the worksheet and titled appropriately. The timing of the first separation also affects the section names.

The Separating Sieve(s) field is updated to match the selected separations.

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Related Articles

The following topics are described in separate articles.

• Sieve Analysis Test Preparation, Visual Description

• Sieve Analysis Test Method, Test Procedure

• Sieve Weighing Method, Weighing Pan Masses, Calculation Method

• Adding Sieves, Refreshing Sieves

• Sieve Analysis Specimen Preparation, Received Sample Condition, Nominal Particle Size, Timing of Drying, Timing of Washing

• Sieve Portion Preparation, Portion Sieving, Sieve Set Selection, Sieving in Parts

• Sieve Analysis Separation

• Sieve Analysis Washing

• Sieve Analysis Results, PSD Chart, Calculated Results

• Sieve Analysis Reporting