8/10/2019 Detergents (Anionic Surfactants, MBAS)

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Detergents(anionic surfactants, MBAS)

Method

Detergents can be introduced into the w at er supply by

industry, soap ma nufa cturers, a nd private households.

Environment al an alysts ofte n include a d eterminat ion

of anionic detergents when assessing surface water

pollution.

The Meth ylene Blue Method

References: USEPA Methods for Chemical Analysis

of Water and Wastes, Method 425.1 (1983). APHA

Standard Methods, 22nd ed., Method 5540 C-2000.

ASTM D 2330-02, Methylene Blue Active Substances.

The met hylene b lue a ctive substa nces (MBAS) met ho d

is used in a 3-minute procedure t o mea sure a nionic

det ergen ts. The procedure fea tures a unique extrac-

tion /sampling te chnique t ha t elimina te s severa l stepsrequired in other te st procedures and p rovides

increased sensitivity.

Anionic det ergen ts rea ct with met hylene blue to

form a blue-colored complex tha t is extracted into an

immiscible o rga nic solvent . Results are expressed in

ppm (mg /L) as line a r a lkylbe nz en e sulfo na te (LAS),

equivalent weight 325.

Shelf-life: eigh t mon th s. We recom men d sto cking

q uan tities tha t w ill be used w ithin seven mont hs.

Instrumental Kits

Description Cat#

Tip Breaking Tool Pack (2 ea) A -0197

Reaction Tube w /Lid, D etergents (5 ea) A -0087

Pipette Tips Pack (30 ea) A -0171

M iniPet , 25 L (1 ea) A -0191

Kit Components common to Detergents

Multi-Analyte PhotometersV-3000 Series(See page 14 for in strument al featu res)

Range: 0-2.50 ppmMeth od: Methylene Blue

Cat#

Detergents Instrumental Refill R-9423

Instrum ental Refill, com es in a cardboard box and contains everything neededto perform 20 test: 20 double-tipped am poules, 21 test tubes, dropper bottle

w ith cap, tip-breaking tool and instructions. Shelf-life 8 m onths.

SAM Single-Analyte Photometer(See page 17 fo r instr um ent al feat ures)

Range: 0-2.50 ppmMeth od: Methylene Blue

Cat#

Detergents SAM Kit I-2017

Instrum ental Refill, 20 double-tipped am poules, 21 test tubes, dropper

bottle w ith cap, tip-breaking tool and instructions.Shelf-life 8 m onths. R-9423

SA M Kit com es in a cardboard box and contains everything needed to perform20 tests: Instrum ental Refill, SA M Photom eter, light shield, 4 A A A batteries,screw driver, and instructions.

Visual Kits

Range: 0-3 ppmMDL: 0.125 ppm /Method : Meth ylene Blue

Cat#

CHEMets Kit K-9400

CH EM ets Refill, 20 am poule sets, Shelf-life 8 m onths R-9400

C om parator0, 0.25, 0.50, 0.75, 1.0, 1.5. 2.0, 3.0 ppm C -9400

Kit com es in a cardboard box and contains everything needed to perform 20tests: Refill, C om parator, reaction tube w ith lid, tip breaking tool andinstructions.

Range: 0-1400 ppmMDL: 100 ppm /Meth od : Meth ylene Blue

Cat#

CHEMets Kit K-9404

C H EM ets Refill, 20 am poule sets and 20 pipette tips;Shelf-life 8 m onths R-9404

C om parator0, 100, 200, 400, 600, 800, 1000, 1200, 1400 ppm C -9404

Kit com es in a cardboard box and contains everything needed to perform 20

tests (except distilled w ater): Refill, C om parator, 25 uL M iniPet 1, reaction tubew ith lid, tip breaking tool, and instructions.

www.chemetrics.com | 1-800-356-3072

M iniPet is a registered t rademar k of Tricont inent Scientif ic, Inc.

Instruction s and M SDS(s) are posted o n our w ebsite.

If no shelf-life is listed f or a pro duct, then t he shelf-life is at least 2 years.