Presentation On Chloride (Cl)Prepared

by Md. Aminur Rahman

Senior Chemist DPHE Zonal Lab. Khulna.

Presentation On Chloride

What is Chloride ?• Chloride is the most abundant Anion in the human

body. A normal 70-kg human body contains approximately 81.7gm of chloride and 45 liters of water.

• Chloride anion Occurs from CaCl2,MgCl2, KCl, NaCl etc.

Source of Chloride: Sea water, Brine,KCl, NaCl etc.

How does Chloride Contaminate in GW

• In Costal belt, During natural disaster like flood, SIDR,AILA etc sea water contaminate the surface water & ground water by over flowing.

• Discharges of effluents from chemical industries, oil-well operations, sewage discharges, irrigation drainage, from refuse leachates etc.

Why Chloride is harmful?

• Chloride is not much more harmful as like as As.• It makes water salty test.• When Much more Chloride contaminated water is used

irrigation it is harmful for crops.• Much more Chloride contaminated water is also

harmful for fisheries.• More chloride may causes itching in eyes & nose.• It also make problem in digestion .• Excess taking of chloride may causes nausea, vomiting,

confusion, convulsion.

Measuring procedures by kit

Measuring High range 0-400mg/L Chloride.• Fill the plastic measuring tube level full with tasted sample.• Pour it into the mixing bottle.• Add the contents of one chloride 2 Indicator Powder Pillow.

Swirl to mix .• Add the Silver Nitrate titrant drop by drop to the sample

water in the mixing bottle. Hold the dropper in vertical position and swirl the bottle to mix after each drop is added . Count each drop as it is added the sample water change yellow to orange color. ( An orange to red color is indicate excess drop use Silver Nitrate titrant).

Calculation of mg/L Chloride

• To obtain the chloride content of the sample water in mg/L chloride just multiply the number of drops of Silver Nitrate titrant by 20.

• To express the result as mg/L sodium chloride Multiply the mg/L chloride found in test by 1.6

Low range ,0-100 mg/L chloride

• Fill the mixing bottle to the 23 ml mark with the sample water .

• Add the contents of one chloride 2 Indicator Powder Pillow. Swirl to mix .

• Add the Silver Nitrate titrant drop by drop to the sample water in the mixing bottle. Hold the dropper in vertical position and swirl the bottle to mix after each drop is added . Count each drop as it is added the sample water change yellow to orange color. ( An orange to red color is indicate excess drop use Silver Nitrate titrant).

Calculation of mg/L Chloride

• To obtain the chloride content of the sample water in mg/L chloride just multiply the number of drops of Silver Nitrate titrant by 5

• To express the result as mg/L sodium chloride Multiply the mg/L chloride found in test by 1.6

Precaution

• During sample collection, preservative must be avoid for chloride test.

Other information about Chloride

• The total obligatory loss of chloride per day amounts to approximately 530 mg. On the basis of the estimate of obligatory loss, a daily dietary intake for adults of 9 mg of chloride per kg of body weight ( 630 mg for a 70 kg man) is essential ( equivalent to slightly more than 1 gm of table-salt per person per day).

• For children up to 18 years of age, a daily dietary intake of 45 mg of chloride per kg of body weight should be sufficient.

Conclusion

To get accurate Chloride result, measure immediately after sample collection.

Thank you for

your attention