Standard Operations
| Table 5 Barcode program options (continued) |
Options | Description |
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Save as User Program | To store the selected parameters as a User Program, see section 6.1 on page 61. |
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Recall Data | Call up saved measurement data or time courses, see section 5.3 on page 37. |
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Instrument Setup | Basic data of the instrument, see section 5.2 on page 27. |
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5.5.5 Sample blank
Turbidity and color in the sample matrix can falsify the results of a photometric analysis. The interference factors come from the sample or are created by reactions with the reagents.
The influence of turbidity and/or color can be eliminated or reduced by taking a sample blank reading.
In the barcode mode, a special cuvette/vial (TNT919) containing the sample blank is placed in cell compartment #1 after the sample reading has been taken and is automatically measured. The sample reading is then corrected by adding or subtracting the blank value. The final result is displayed, with the message "After blank value corr.".
Some barcode tests do not require a sample blank value to be determined, as turbidity and color are dealt with during the test procedure. Other barcode tests use the reagent test vials to determine the sample blank. Please refer to the Hach procedure for
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