Hach DR/700 - SUSPENDED SOLIDS; (Also called Nonfilterable Residue) Photometric Method*

81-69
Method 8006
SUSPENDED SOLIDS (0 to 750 mg/L)
For water and wastewater
(Also called Nonfilterable Residue) Photometric Method*
1. Blend 500 mL of
sample in a blender at
high speed for exactly
two minutes.
Note: If sample cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
Note: Obtain blender
locally. All other
apparatus is available
from Hach.
2. Pour the blended
sample into a 600-mL
beaker.
3. Stir the sample
and immediately
pipet 25 mL of the
blended sample from
the center of the
beaker into a sample
cell (the prepared
sample). Cap.
Note: Use a pipet filler
or bulb.
4. Install module
81.01
in a DR/700.
5. Press: I/O
The display will show
810 nm
and module number
81.01
6. After 2 seconds,
the display will show
a program number,
the concentration
units and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
81.04.1
* Adapted from Sewage and Industrial Waste, 31, 1159 (1959)
2 minutes