27513-40

Availability: Stock Item

40 strips per bottle

Quantab Chloride Titrator - Low Range 30-600ppm Cl (0.005-0.1% NaCl

10-20 ppm increments

#27449-40

Item# QUA30 

$34.00

Quantab Chloride Titrator - Low Range 30-600ppm Cl (0.005-0.1% NaCl

10-20 ppm increments

#27449-40

By the case (6)

 $163.00

27449-40

Availability: Stock Item

40 strips per bottle

Quantab Chloride Titrator - High Range 300-6000ppm Cl (0.005-0.1% NaCl

measures in 100-200 ppm increments

#27513-40

Item# QUA300

$34.00

Quantab Chloride Titrator - High Range 300-6000ppm Cl (0.005-0.1% NaCl

measures in 100-200 ppm increments

#27513-40

By the case (6)

 $163.00

How do the Quantab test strips for chloride work?

Problem Description:
How do the Quantab test strips for chloride work?

Problem Solution:
When the Quantab® strip is placed in aqueous solutions, fluid rises up the strip by capillary action. When the strip is completely saturated, a moisture sensitive string across the top of the titrator turns dark blue.

The strip contains silver ions, which combine with chloride in the sample to form a white column of silver chloride. The length of the white column (silver chloride) in the strip is proportional to the chloride ion concentration.

Each lot of Quantab strips is calibrated independently, so that the chart on the bottle where you find the chloride concentration may differ from a previous bottle.
 

Quantab Test Strip numbers on strips vs. bottle

Problem Description:
Why do the Quantab Test Strips have a scale that goes to 10, but the numbers on the bottle don't go up that high?

Problem Solution:
Each lot of Quantab Test Strips for chloride is calibrated independently, therefore the highest chloride concentration for one lot may correspond to a different number on the strip for a different lot.

Although most lots are not calibrated to go up to the top of the scale, the 0-10 scale on the strip can be divided into increments of 0.2, which is easy to read.

 

Interferences with Quantab Test Strips

Problem Description:
What can interfere with the Quantab Test Strips for chloride?

Problem Solution:
The Quantab Test Strip reaction involves the formation of silver chloride on the strip from the combination of silver on the strip with chloride in the sample. Any anion (for example bromide, iodide, cyanide, and sulfide) which will react with the silver to give an insoluble precipitate may interfere with the Quantab® test and give a higher than actual result.

Strong acids may also interfere, however the strips will work in caustic or extremely high pH samples. Nitrite and nitrate have no adverse effect on the Quantab® test.

Quantabs will work in colored solutions as long as they are clear, however turbid solutions can clog the wick and cause very slow or incomplete reactions. Filter turbid samples before testing.

Quantab strips can be used in a wide range of temperatures.

Range limits on Quantab Test Strips

Problem Description:
How can I extend the range of the Quantab Test Strips for chloride? The number on my strip is above (or below) the numbers shown on the bottle.


Problem Solution:
The range for these strips cannot be extended above or below the limits shown on the bottle. The calibration is not linear and results will not be accurate outside of the stated range.

Samples above the range can be diluted until the chloride concentration is in the measurable range. Results for diluted samples should be multiplied by the dilution factor. To measure samples below the lower limit on the strips, a different method such as titration should be used.

 

The salt that is normally found in contaminated water wells is composed primarily of calcium of sodium chloride.  The salinity of water is measured by the concentration of the chloride ion.  The U.S. Environmental Protection Agency has established a Secondary Drinking Water Standard of 250 mg/l for chloride in public drinking water supplies.  This is an aesthetic standard and simply means that some individuals will begin noticing a salty taste in water when the chloride concentration exceeds this level.  Salt contamination of water wells may occur by a single or a combination of ways.  Following are a number of possible sources of salt contamination:

1. Oil-field brine is a waste water produced during oil and gas drilling and producing operations.  Brine can be as much as ten times more salty than sea water. 

 According to Ohio oil and gas law, brine must be contained and properly injected into deep formations through permitted injection wells or properly spread on roadways

for ice and dust control.  However, improper storage or disposal of brine can cause contamination of ground water.

2. Rock-salt used during winter months for the deicing of highways or stored in open piles, can enter ground-water by surface or stream runoff.

3. Water softeners use salt to condition hard water.  Discharge of salty regeneration fluid into septic systems, on the ground surface or into storm sewers may

 contaminate shallow ground-water aquifers.

4. Naturally occurring saline fluids can contaminate a water well that is drilled too deep.  In addition, if a water well is developed in a fresh water aquifer that is

 underlain by heavier saline water, contamination can occur when the water well is pumped.  If fresh water is pumped from the aquifer more quickly than it can be

 replenished, the underlying saline water may eventually be drawn upward into the water well. 

Quantab chloride titrators can be used to measure salt (chloride) concentration in water.  When the Quantab is placed upright in water, fluid will rise in the brown column

 of the Quantab.  If chloride is present in the water, it will cause a chemical reaction that turns the brown column, white.  When the reaction is complete, the yellow

 strip at the top of the column turns dark blue.  The height of the white color change in the column indicates the chloride concentration. 

Directions:

1.                  Obtain a sample of your water prior to any filters or water conditioning equipment.  The valve at the bottom of your pressure tank is a good place to obtain a sample if you have conditioning equipment.

2.         Fill a cup or jar with water to a depth of one inch after you have run the water five minutes.

3.         Stand the plastic strip upright in the cup or jar with the word Quantab at the top.  Do not immerse the entire strip.

4.         Within several minutes, the yellow strip will turn blue indicating completion of the test.

5.         Within five minutes after this change, read the scale on the plastic strip.

6.         Holding the top of the Quantab, run your thumbnail along the numbered strip toward the bottom.  This procedure will make the test result permanent.