Test Procedures
SURFACTANTS
ION PAIR EXTRACTION–BROMPHENOL BLUE INDICATOR METHOD
CODE 4876-01
QUANTITY
CONTENTS
CODE
50 g
pH Adjustment Powder
4509- H
10 g
Sodium Chloride Reagent
4877-D
2 X 60 mL
*DS Indicator Reagent
*4508-H
1
Spoon, 0.5 g, plastic
0698
1
Spoon, 0.1 g, plastic
0699
1
Pipet, 1.0 mL, plastic
0354
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Aqueous waste from households and industrial laundering operations is the main source
of surfactants in waters. Surfactants are found in low concentrations in natural water
except in areas of an outfall or other point source.
APPLICATION:
Surface water, wastewater.
RANGE:
0.0–8.0 ppm as Linear Alkyl Sulfonates (LAS).
MDL:
0.5 ppm
METHOD:
The presence of LAS in the water sample causes the transfer
of bromphenol blue dye from the organic reagent layer
to the aqueous layer. The amount of color in the aqueous
layer is proportional to the concentration of the LAS in the
sample. LAS are Methylene Blue Active Substances (MBAS).
This calibration is based on sodium lauryl sulfate (dodecyl
sodium sulfate). Some linear alkyl sulfonates may have a
slightly diff erent response. Prepare standards of a known
concentration and follow the test procedure below to
determine a conversion factor.
SAMPLE HANDLING &
PRESERVATION:
Analyze samples as soon as possible. May be stored at 4°C for
24 hours. Warm to room temperature before testing.
INTERFERENCES:
Cationic and non-ionic surfactants.
SMART Spectro 2 Test Procedures 05.02.16
SURFACTANTS
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