Taylor's QAC & Polyquat Test Kits - Taylor Technologies

Taylor’s QAC & Polyquat Test KitsINTRODUCTIONQuaternary ammonium compounds,often referred to as “quats” andabbreviated as QAC, and theirstructurally longer cousins the polyquatsare nonoxidizing biocides. In commercialand industrial water treatmentprograms they are widely used tocontrol algae, bacteria, and fungi inopen recirculating water systems(e.g., cooling towers and evaporativecondensers). They interfere with cellmembrane function, which eventuallycauses the organism to die. Thesesurface-active chemicals may be usedin combination with other microbialcontrol agents, such as chlorine.Determination is based upon directneutralization of the QAC or polyquat.QAC & POLYQUAT KITSK-1582Drop test for high QAC & polyquatlevels (using direct neutralization);1 drop = 10 or 25 ppm QAC,1 drop = 3.5 or 9 ppm polyquatK-9065Drop test for low QAC & polyquatlevels (using direct neutralization);1 drop = 1.25 ppm QAC,1 drop = 0.5 ppm polyquatUSER BENEFITS•Titrations do not require the abilityto match colors, only the ability to seethe permanent color change at the•endpoint of the reaction.These test kits are practical for both•on- and off-site testing.Test kits come complete with allnecessary reagents and equipment.The K-1582 drop test for determining quaternary ammonium compounds is valued by HVACcooling water service and control personnel.•Waterproof instructions areprinted on plastic-impregnated paper•that resists fading and tearing.Color coding of reagent caps to•instructions helps prevent mishaps.Picture guides to color transitions•in the test reassure new users.Custom-molded, durable plastic•cases provide safe storage for tests.Proven chemistries are based onStandard Methods for the Examinationof Water and Wastewater, APHA,Washington, DC, and/or AmericanSociety for Testing and Materials,ASTM, Philadelphia, PA. Somemethods use proprietary chemistrydeveloped by Taylor Technologies.ALSO AVAILABLETests for oxidizing biocides.•Individual replacement reagents.More than 500 single-parameter andmultiparameter kits covering a wide•range of water-testing requirements.Testing supplies and kit replacementparts (e.g., burets, flasks, test tubes,•and test cells).Toll-free technical assistance at800-TEST KIT.

REPRESENTATIVE TEST PROCEDUREReproduced from K-1582 instruction:DROP TESTHIGH QAC/HIGH POLYQUAT (1 drop = 3.5 or 9 ppm polyquat, 1 drop = 10 or 25 ppm QAC)COMPONENTS:1 x 5256 Instruction1 x 9012 Pipet, Calibrated 0.5 & 1.0 mL, plastic w/brown cap1 x 9198BR Sample Tubes, Graduated, 25 mL, plastic w/cap and brown dot1 x R-0638BR-C Phenolphthalein Indicator (brown cap), 2 oz, DB1 x R-0736BR-C Sulfuric Acid .6N (brown cap), 2 oz, DB1 x R-0881-A Toluidine Blue O Indicator, .75 oz, DB1 x R-0884-C QAC Titrating Solution, 2 oz, DB1 x R-0950-C Complexing Reagent, 2 ozTO ORDER REPLACEMENT PARTS AND REAGENTS CALL TOLL-FREE800-TEST KIT (800-837-8548).PROCEDURE:CAREFULLY READ AND FOLLOW PRECAUTIONS ON REAGENT LABELS.KEEP REAGENTS AWAY FROM CHILDREN.For 1 drop = 10 ppm QAC or 3.5 ppm polyquatNOTE: Run a blank using water containing no QAC or polyquat. Record drops ofR-0884 QAC Titrating Solution used.1. Rinse and fill 25 mL sample tube (#9198BR) to 25 mL mark with water to betested (Fig. 1).2. Using a 1.0 mL pipet (#9012), add 1.0 mL R-0950 Complexing Reagent. Swirl tomix.NOTE: If sample water contains a hardness concentration above 500 ppm, add2.0 mL (2 x 1.0 mL) R-0950 Complexing Reagent.3. Add 1 drop R-0638BR Phenolphthalein Indicator. Swirl to mix. If colorless,proceed to Step 4. If pink (Fig. 2), add R-0736BR Sulfuric Acid .6N dropwise,swirling after each drop, until color changes from pink to colorless.4. Add 3 drops R-0881 Toluidine Blue O Indicator. Swirl to mix. Sample should belight blue (Fig. 3).5. Add R-0884 QAC Titrating Solution dropwise, swirling and counting after eachdrop, until color changes from light blue to violet-pink (Fig. 4). Always hold bottlein vertical position.NOTE: Further addition of R-0884 QAC Titrating Solution should produce no colorchange.6. Subtract drops of R-0884 QAC Titrating Solution used in blank from drops used insample (Step 5). Multiply by 10. Record as parts per million (ppm) QAC as n-alkyl(60%C 14 , 30% C 16 , 5% C 12 , 5% C 18 ) dimethylbenzylammonium chloride/n-alkyl(68%C 12 , 32% C 14 )dimethylethylbenzylammonium chloride. For results as polyquat,multiply by 3.5. Record as ppm polyquat as poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride].NOTE: Equivalences for quaternary ammonium compounds and polyquats otherthan those listed must be determined by titration with a known standard.For 1 drop = 25 ppm QAC or 9 ppm polyquatNOTE: Run a blank using water containing no QAC or polyquat. Record drops ofR-0884 QAC Titrating Solution used.1. Rinse and fill 25 mL sample tube (#9198BR) to 10 mL mark with water to betested (Fig. 1).2. Using a 1.0 mL pipet (#9012), add 0.5 mL R-0950 Complexing Reagent. Swirl tomix.NOTE: If sample water contains a hardness concentration above 500 ppm, add1.0 mL R-0950 Complexing Reagent.(OVER)Fig. 1Fig. 2Fig. 3Instr. #5256DROP TESTHIGH QAC/HIGH POLYQUAT (1 drop = 3.5 or 9 ppm polyquat, 1 drop = 10 or 25 ppm QAC)3. Add 1 drop R-0638BR Phenolphthalein Indicator. Swirl to mix. If colorless, proceedto Step 4. If pink (Fig. 2), add R-0736BR Sulfuric Acid .6N dropwise, swirling aftereach drop, until color changes from pink to colorless.4. Add 1 drop R-0881 Toluidine Blue O Indicator. Swirl to mix. Sample should belight blue (Fig. 3).5. Add R-0884 QAC Titrating Solution dropwise, swirling and counting after eachdrop, until color changes from light blue to violet-pink (Fig. 4). Always hold bottlein vertical position.NOTE: Further addition of R-0884 QAC Titrating Solution should produce no colorchange.6. Subtract drops of R-0884 QAC Titrating Solution used in blank from drops usedin sample (Step 5). Multiply by 25. Record as parts per million (ppm) QAC asn-alkyl(60% C 14 , 30% C 16 , 5% C 12 , 5% C 18 )dimethylbenzylammonium chloride/n-alkyl(68% C 12 , 32% C 14 )dimethylethylbenzylammonium chloride. For resultsas polyquat, multiply by 9. Record as ppm polyquat as poly[oxyethylene(dimethyliminio) ethylene(dimethyliminio)ethylene dichloride].NOTE: Equivalences for quaternary ammonium compounds and polyquats otherthan those listed must be determined by titration with a known standard.Fig. 4Instr. #525631 Loveton Circle, Sparks, MD 21152 U.S.A.800-TEST KIT (837-8548) • 410-472-4340 3/09rev. 011910