This article consists of Standard test procedure for Silica Bag.

Standard test procedure for Silica Bag

1. Description:

Following visual checking to be carried out

Procedure:

Description of bag: White colored, three sides sealed, printed pillow shape sack having silica granules inside it.

Description of silica: White to off white amorphous granules packed in a sack (cotton sack)

Note down the results in test data sheet of Standard test procedure for Silica Bag

2. Printing matter:

(Test to be performed on five samples)

Procedure: As per approved specimen.

Text:

• Desiccant
• Silica gel
• Do not eat

Note down the results in test data sheet of Standard test procedure for Silica Bag

3.Dimensions:

(Test to be performed on five samples)

Instrument: Scale

Procedure: Measure the Length x width in mm by foot ruler

Note down the results in test data sheet of Standard test procedure for Silica Bag

4. Weight of silica bag:

(Test to be performed on five samples)

Instrument: Analytical Balance

  Procedure: Weigh the bags on the analytical balance

Note down the results in test data sheet

5. Loss on drying:

(Determined on 5.0 g of sample at 105 °c for 3 hrs.)

    Instrument: Vacuum Oven

Procedure: Weigh the LOD bottle with stopper that has been previously dried at 105 ⁰ C ± 2 °C. For at least ½ hours. Note down the weight in test data sheet (W1).

Place the 5.0 gm of sample in LOD bottle cover it and accurately weigh the bottle along with sample. Note down the weight in test data sheet (W2).

Distribute the sample as evenly as practicable by gentle sidewise shaking to a depth Place the loaded bottle in the drying chamber (LOD oven) remove the stopper and leave it also in the chamber Dry them at 105 ⁰ C ± 2 °C. Sample for 3 hrs. After drying is completed, open the drying chamber, close the bottle promptly and allow it to cool to room temperature in desiccators. Before weighing weigh the bottle and the contents. Note down the weight into test data sheet (W3).

For ‘constant weight’ again place the loaded bottle in the drying chamber remove the stopper and leave it also in the chamber. Dry the sample for 1 hrs. in same condition.  After drying is completed, open the drying chamber, close the bottle promptly and allow it to cool to room temperature in desiccators. Before weighing weigh the bottle and the contents. Note down the weight in test data sheet (W4).

Those two consecutive weighing W3 and W4 do not differ by more than 0.5 mg,

Note down the results in test data sheet of Standard test procedure for Silica Bag.

Calculation:

Loss in Weight (W2-W4)

————————————–             X     100

Weight of sample (W2-W1)

6. Revision History: