The Exchange Test Method
LABORATORY TEST METHOD NO. H-10: SOLID CONTENT
Issue Date: 30 Apr 1993
Revision Date:09/30/2011
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PURPOSE:
To determine the amount of solids present in liquid specimen.
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PRINCIPLE:
Test specimen is placed in a weighing dish and dried until all moisture is removed.
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REFERENCES:
Federal Test Method Standard No.191, Method 2601, Moisture Content by Oven and Balance Method.
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APPARATUS AND MATERIALS:
Mettler Scale Model No. AE200 Baxter Constant Temperature Oven, Model DN-63, or equivalent. Aluminum Weighing Dishes
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PROCEDURE:
- 5.1 Mark Weighing dishes then weigh to the nearest thousandth of a gram and record as tare weight (A).
- 5.2 Pour approximately 5 to 8 grams of liquid in weighing dish.
- 5.3 Weigh dish with" specimen to the nearest thousandth of a gram. Record this weight as specimen plus tare dish weight (B).
- 5.4 Place this dish in oven with temperature set at 105°C (221°F), and dry the specimen for 3 hours.
- 5.5 Remove dish from oven and weigh again to the nearest thousandth of a gram and record as dry specimen plus tare dish weight (C).
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EVALUATION:
Using "the following formula calculate the percent of solids and record the results:
- A = Tare weight of dish
- B = Tare weight of the dish plus specimen weight
- C = Tare weight of the dish, plus the weight of the dry specimen.
- % Solids = (Net weight of the dry specimen / Net weight of the original specimen) x 100
- = { (C-A) / (B-A) } x 100
REPORT
Report the percent solids as an average of at least three specimens.