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An analytical batch is a group of samples run together in one sequence, sharing a calibration curve, blanks, reference materials, and verification samples. The alkalinity batch size is 10 samples. Each batch of 10 unknown samples contains a sample to verify precision and a sample to verify accuracy.

Blanks

Blanks are not run for this method because DI water has no buffering capacity and would therefore fail the slope program. Thus, blanks are not applicable to this chemistry.

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Alkalinity dataflow

User-defined variables (Figure 13), with values from the example given in the Dispensing rate section:

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Figure 22. Alkalinity measurement data flow.

Data Available in LORE

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Interstitial Waters Standard

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Report 

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• Exp: expedition number
• Site: site number
• Hole: hole number
• Core: core number
• Type: type indicates the coring tool used to recover the core (typical types are F, H, R, X).
• Sect: section number
• A/W: archive (A) or working (W) section half.
• Top offset on section (cm): position of the upper edge of the sample, measured relative to the top of the section.
• Bottom offset on section (cm): position of the lower edge of the sample, measured relative to the top of the section.
• Top depth CSF-A (m): position of observation expressed relative to the top of the hole.
• Top depth [other] (m): position of observation expressed relative to the top of the hole. The location is presented in a scale selected by the science party or the report user.
• Sampling tool: tool used to collect sample

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• Data columns: header lists parameter measured and concentration units, followed by wavelength (for ICP-AES) and then analysis method.

Expanded ALKALINITY Report

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When the alkalinity titration finishes, the GRAN-METHOD window shows the slope information, correction factors, and the final alkalinity value (Figure 18).
Edit outlier Gran factor points, if necessary. When satisfied with the results, click Ok/Save to load the values into LIMS.

Health, safety and environment

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