Arsenic
Silver Diethyldithiocarbamate Method
0 to 0.200 mg/L As
Scope and application: For water, wastewater and seawater. Distillation is required. USEPA accepted
reporting for drinking and wastewater analysis.
1
Adapted from Standard Methods for the Examination of Water and Wastewater.
2
Procedure is equivalent to Standard Method 3500-As for drinking water analysis.
Test preparation
Instrument-specific information
Instrument
DR 6000
DR 3800
DR 2800
DR 2700
DR 1900
DR 5000
DR 3900
Before starting
A manual calibration is necessary for this procedure, refer to
the user program for each new lot of arsenic absorber solution.
Prepare the arsenic absorber solution before starting the test procedure. Refer to
Set up the distillation apparatus in a fume hood to prevent exposure to hazardous gas.
In bright light conditions (e.g., direct sunlight), close the cell compartment, if applicable, with the protective cover during
measurements.
Do not use the Pour-Thru Cell or sipper module (for applicable instruments) with this test.
Review the Safety Data Sheets (MSDS/SDS) for the chemicals that are used. Use the recommended personal protective
equipment.
Dispose of reacted solutions according to local, state and federal regulations. Refer to the Safety Data Sheets for disposal
information for unused reagents. Refer to the environmental, health and safety staff for your facility and/or local regulatory
agencies for further disposal information.
Items to collect
Description
Apparatus (refer to
Required apparatus
Arsenic Standard Solution, 1000–mg/L As
Hydrochloric Acid, ACS
Table 1
shows all of the instruments that can make a user calibration program for this
test. The table also shows sample cell and orientation requirements for reagent addition
tests, such as powder pillow or bulk reagent tests.
To use the table, select an instrument, then read across to find the applicable information
for this test.
Table 1 Instrument-specific information
Sample cell orientation
The fill line is to the right.
The fill line is toward the user.
on page 7)
1
Calibration
on page 5. Make a new calibration and update
DOC316.53.01005
Sample cell
2612602
Reagent preparation
on page 5.
Quantity
Method 8013
2
for
–
varies
25 mL
1