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High Level QAC Test Strip 0 - 1500ppm (50 Tests)High Level QAC Test Strip 0 - 1500ppm (50 Tests)

Precision Labs High Level QAC Test Strip 0-1500ppm (50 Tests)

Price £7.99

Description

The High Level QAC Test Strip (Quaternary Ammonium Compounds) measures the range of 1-1500 ppm in increments of 200, 400, 750, 1000 and 1500 ppm, and gives results in just seconds. Check for higher levels of QAC when testing stronger solutions that kill pathogenic organisms, as opposed to testing for residual QAC with our Low Level QAC test strip, or our standard QAC Quick Response Test Strip.

Precision Laboratories QAC test papers and strips utilize an effect commonly referred to as the “protein-error of indicators” to quantify the QAC ppm levels.  While first observed with proteins (thus the name), the technique utilizes pH indicators and buffering systems to create an environment where the test paper or strip reacts (develops color) proportional to the amount of analyte (QAC) present.  The PL QAC test papers and strips have color charts calibrated to solutions prepared from OASIS 146, an industry standard QAC product.  The performance of the papers and strips with alternate QAC products should always be verified.  In addition, any additives should be evaluated to see if they contribute to the “protein-error” effect.

How to Use:

  1. Remove a High Level QAC test strip from the vial by holding it between your index finger and thumb. Do not touch the test pad with your fingers.
  2. Dip the strip into the solution to be tested and remove immediately.
  3. Compare the test strip to the included color chart immediately. It is very important for the accuracy of the results to read the strip immediately (the maximum wait time is 5 seconds).

Contains: 50 strips per bag

The Precision Laboratories QAC test strips have been calibrated for use with all the commonly used hyamine and steramine quat (quaternary ammonium chloride) solutions. Some commercially available strips have errors as high as 50%. Use this guide to test your strips.

Oasis 146
To prepare a 400ppm QAC solution, dilute 0.530ml of Oasis 146 into 100ml of water.

Active Ingredients Conc. Active Ingredients Conc.
Alkyl dimethylbenzyl ammonium chloride 3.00% Octyldecyl dimethyl ammonium chloride 2.25%
di-n-octyl dimethyl ammonium chloride 0.90% di-n-decyl dimethyl ammonium chloride 1.35%

 

Hyamine 3500-80%
Prepare a stock solution by dissolving 1.25g in 100ml of water to produce a 10,000ppm solution. To prepare a 400ppm QAC solution, dilute 4ml of the stock solution into 100ml of water.

Active Ingredients
n-Alkyl (C14=50%, C12=40%, C16=10%) dimethylbenzyl ammonium chloride-80%

 

Bardac 2280
Prepare a stock solution by dissolving 1.25g Bardac 2280 in 100ml of water to produce a 10,000ppm solution. To prepare a 400ppm QAC solution, dilute 4ml of the stock solution into 100ml of water.

Active Ingredients
Didecyldimethyl ammonium chloride-80%

 

Bardac 2250
Prepare a stock solution by dissolving 2g Bardac 2250 in 100ml of water to produce a 10,000ppm solution. To prepare a 400ppm QAC solution, dilute 4ml of the stock solution into 100ml of water.

Active Ingredients
Didecyldimethyl ammonium chloride-50%

 

Sysco QAC Tablets
To prepare a 400ppm QAC solution, place 1 tablet into 2.82L (1 US Gal.) of water.

Active Ingredients

Alkyl (C14=95%, C12=3%, C16=2%) dimethylbenzyl ammonium chloride-50%

The accuracy of QAC tests strips does not depend on the pH value of solutions to be tested in the range of 1.86 – 9.2 pH, but rather it depends on buffering capacity. When the pH of a solution to be tested is a result of acidic or alkaline compounds without buffering capacity, then the accuracy of the test is not influenced. In the case that the pH of a solution to be tested is a result of a buffer, then the measure of influence depends on the buffering capacity of the solution.

Test:
Sets of control solutions with QAC concentrations 0 – 50 – 100 – 200 – 400 ppm were prepared in following solutions:

  • Hydrochloric acid /0.1 M/, pH 1.1
  • Tartaric acid /0.1M/ , pH 1.86
  • McIlvaine buffers (0.1M citric acid, 0.2 M  disodium hydrogen  phosphate), pH 2.2 – 3.0 – 4.0 – 5.0 – 6.0 – 7.0 – 8.0 – 9.0
  • Sodium tetraborate /0.01M/ , 9.20

The table below contains readings according to the regular color chart:

    pH buffer  /b/  0 ppm QAC   50 ppm QAC  100 ppm QAC  200 ppm QAC  400ppm QAC
    1.1       0       0       0     ≤50      50
    1.86       0      50     100     200     400
    2.2  /b/       0    0-50       50     100     200
    3.0  /b/       0      50     100     200     400
    4.0  /b/       0      50     100     200     400
    5.0  /b/     ≤ 50     100     200     400    ≥400
    6.0  /b/      50     200     400   higher  higher
    7.0  /b/     100     400     ≥400   higher  higher
    8.0  /b/     200     400     higher   higher  higher
    9.0  /b/     400    higher     higher   higher  higher
    9.2       0       50      100     200

    400

 

 

Ref: PE-QAC Stock Status: 4 Units in Stock Manufactured by: Precision Laboratories
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