Hach DR2400 Manual page 785

Hide thumbs Also See for DR2400:

Table of Contents

Wipe the prepared

sample and place it into

the cell holder.

Sample Collection, Preservation, and Storage

Accuracy Check

VolatileAci_None_Other_ESR_Eng_Ody.fm

Results will appear in

Collect samples in clean plastic or glass bottles. Analyze as soon as possible after

collection. Samples can be stored for up to 24 hours by cooling to 4 °C (40 °F) or

below. Warm samples to room temperature before analysis.

Standard Additions Method (Sample Spike)

1. After reading test results, leave the sample cell (unspiked sample) in the

additions procedure will appear.

to accept the default values for standard concentration, sample

volume, and spike volumes. Touch

are accepted, the unspiked sample reading will appear in the top row. See

Standard Additions in the instrument manual for more information.

4. Snap the neck off a Volatile Acid Voluette

acetic acid.

5. Prepare three sample spikes. Fill three Mixing Cylinders (Cat. No. 1896-40)

with 25 mL of sample. Use the TenSette

0.3 mL of standard, respectively, to each sample and mix thoroughly.

6. Analyze each sample spike as described in the procedure above, starting with

the 0.1 mL sample spike. Accept each standard additions reading by touching

. Each addition should reflect approximately 100% recovery.

7. After completing the sequence, touch

the standard additions data points, accounting for matrix interferences. Touch

, then select

the sample spikes and the "Ideal Line" of 100% recovery.

See Section 3.2.2 Standard Additions on page 32 for more information.

. A summary of the standard

Standard Additions

to change these values. After values

Ampule Standard, 62,500-mg/L as

Pipet to add 0.1 mL, 0.2 mL, and

Volatile Acids

to view the best-fit line through

to view the relationship between

Volatile Acids