Hach DR2400 Manual page 594

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Table of Contents

Accuracy Check

Method Performance

Standard Solution Method

For greater accuracy, analyze standard solutions when new lots of reagent are

1. Weigh out 1.00 g of Phenol, ACS. Transfer to a 1000-mL volumetric flask.

Dilute to the mark with freshly boiled and cooled deionized water. This is a

1000-mg/L stock solution.

2. Pipet 10.0 mL of the 1000-mg/L stock solution to a 1000-mL volumetric flask.

Dilute to the mark with deionized water. This is a 10-mg/L working solution.

3. Prepare a 0.200-mg/L standard solution by pipetting 10.0 mL of the working

solution into a 500-mL volumetric flask. Dilute to the mark with

deionized water.

4. Perform the phenol procedure described above using the prepared standard.

5. To adjust the calibration curve using the reading obtained with the standard

solution, touch

Standard Adjust

concentration is used, touch the number in the box to enter the actual

concentration, then touch

See Section 3.2.4 Adjusting the Standard Curve on page 40 for more information.

Standard: 0.100 mg/L phenol

See Section 3.4.3 Precision on page 44 for more information, or if the standard

concentration did not fall within the specified range.

Portion of Curve

Entire range

See Section 3.4.5 Sensitivity on page 44 for more information.

on the current program menu. Touch

to accept the displayed concentration. If an alternate

95% Confidence Limits of Distribution

0.091–0.109 mg/L phenol

∆Concentration

0.002 mg/L phenol

Phenols_None_Other_4AM_Eng_Ody.fm