The Exchange Test Method

LABORATORY TEST METHOD NO. H-10: SOLID CONTENT

Revision Date:09/30/2011

1. PURPOSE:

   To determine the amount of solids present in liquid specimen.

2. PRINCIPLE:

   Test specimen is placed in a weighing dish and dried until all moisture is removed.

3. REFERENCES:

   Federal Test Method Standard No.191, Method 2601, Moisture Content by Oven and Balance Method.

4. APPARATUS AND MATERIALS:

   Mettler Scale Model No. AE200 Baxter Constant Temperature Oven, Model DN-63, or equivalent. Aluminum Weighing Dishes

5. 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).

6. 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

7. REPORT

   Report the percent solids as an average of at least three specimens.