Atlas of visual inspection of the cervix with acetic acid for screening, triage, and assessment for treatment

To prepare chlorine solution of a particular strength, the following formula may be used to calculate the required amount of dry powder (household bleach):
g/L = [% of dilute solution/% of concentrate of active ingredient (calcium hypochlorite) of dry powder] × 1000
For example, to make 0.5% chlorine solution from a dry powder of 35% calcium hypochlorite: [0.5%/35%] × 1000 = 14.2 g. Hence, 14.2 g of dry powder will be required to prepare 1 L of solution.

Materials required for preparation of 1 L of 0.5% chlorine solution:

• Plastic bucket (medium-sized) and mug
• Wooden stirrer
• Teaspoon
• Bleaching powder kept in an airtight container
• Water: 1 L
• Utility gloves
• Laboratory apron

Preparation:

• Put on a laboratory apron, and wear utility gloves.
• Take 1 L of clean water in the plastic bucket.
• Measure 14.2 g (~3 teaspoons) of bleaching powder and put it into the plastic mug.
• Add a little water to the mug and make a thick paste.
• Add this paste to the water in the bucket.
• Stir with the wooden stirrer until a milky white solution is obtained.
• Keep the solution covered. The 0.5% chlorine solution is ready for use.

Label: 0.5% chlorine solution prepared on dd/mm/yyyy

Caution:

• Chlorine solution must be prepared daily, because it loses strength over time.
• Clean water free of organic matter should be used.
• Chlorine solution should be prepared in a well-ventilated area.
• Wearing of gloves and a laboratory apron is necessary to avoid direct contact of chlorine solution with skin.
• Plastic containers should be used for the preparation and storage of chlorine solution.

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