1、 FORD LABORATORY TEST METHOD AZ 003-06 Date Action Revisions 2000 08 30 Revised Editorial no technical change A. Cockman 2000 05 22 Revised Editorial no technical change A. Cockman 1992 03 19 Printed copies are uncontrolled Page 1 of 5 Copyright 2000, Ford Global Technologies, Inc. RETENTIVITY OF AC
2、TIVATED CARBON Application Purified dry air is passed through a carbon tetrachloride - saturated sample for six hours under specified conditions. The percentage of carbon tetrachloride retained by the carbon is its retentivity. Apparatus Required The apparatus is shown diagrammatically in figures 1
3、and 2. It consists of the following: Pressure Regulator - A Reduces air line pressure to 34.5 kPa, Type 11 - 0004. Source: C. A. Norgren Company 5400 S. Delaware Street Littleton, Colorado 80120 or equivalent. Graduate - B 100 mL, Catalog No. 8 - 553 - B, Fisher Scientific or equivalent. Aspirator B
4、ottle - C, D Three 2 liter, (C) Activated Carbon, (D) Calcium Chloride, (D) Calcium Chloride. Catalog No. 2 -972 - E, Fisher Scientific or equivalen t. Insulated Box - J This may be an ordinary insulated picnic box. Needle Valve - G Stainless steel, for air control, Catalog No. 10 - 583, Fisher Scie
5、ntific or equivalent. Flowmeter U Tube - H Catalog No. 11 - 286, Fisher Scientific or equivalent. Activity Tube - I The carbon sample tube shown in figure 2 is a hard glass, “U“ shaped tube, 190 mm long, having an inside diameter in the larger leg of the tube of 14.1 mm. A perforated porcelain disc
6、is fused to the wall of this tube at the lower end approxima tely 40 mm from the bottom, and a line is marked on the tube exactly 100 mm above the surface of the disc. When filled to the 100 mm mark, the tube holds 15.7 mL of the sample. This part must be custom made. FORD LABORATORY TEST METHOD AZ
7、003-06 Page 2 of 5 Copyright 2000, Ford Global Technologies, Inc. Source: Leonard Glass Blowing 867 McKinley Av enue Columbus, Ohio 43222 or equivalent. Laboratory Balance Accurate to 0.01 g Rubber Stoppers One No. 5 1/2, 1 hole, No. 14 - 135 Fisher Scientific or equivalent. Three No. 8, 1 hole, No.
8、 14 - 135 Fisher Scientific or equivalent. One No. 1, 1 hole, No. 14 - 135 Fisher Scientific or equivalent. Capillary Tubing 3.0 - 5.0 m; inside diameter, 1 mm and 2 mm, Catalog No. 11 - 360 - B, Fisher Scientific or equivalent. Glass Tubing 6.0 - 8.0 m; inside diameter 6 mm, Catalog No. 11 - 350, F
9、isher Scientific or equivalent. Rubber Tubing 1.2 - 3.7 m lengths, Catalog No. 14 - 155, Fisher Scientific or equivalent. Materials Required Glass Wool 0.9 kg; medium, Catalog No. 11 - 390, Fisher Scientific or equivalent. Activated Carbon 2.3 kg, No. 6 - 8 mesh. Calcium Chloride Reagen t grade, 6.8
10、 kg, No. 8 mesh. Carbon Tetrachloride Commercial grade. Mercury C.P. Refer to Industrial Hygiene Bulletin No. 17 for health and safety comments. Conditioning and Test Conditions All test values indicated herein are based on material condi tioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ -
11、5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD AZ 003-06 Page 3 of 5 Copyright 2000, Ford Global Technologies, Inc. Procedure 1. The carbon is saturated with carbon tetrachlorid e vapor in the
12、 special tube as directed by the Activity Test, AZ 3 - 5. (Note and record weight of activity tube from Step 7 and weight of sample from Step 14 of the Procedure AZ 3 - 5). 2. Maintain the sample at 25 C throughout the test in the controlled w ater bath. 3. Connect the retentivity apparatus and pass
13、 purified air into the carbon tetrachloride saturated sample and into graduate (B) containing 50 mm of mercury. 4. Pass the purified air for exactly 6 hours at 780 mL per minute. 5. Weigh tube cont aining sample and record. Note: As the amount of vapor retained by the sample is dependent upon the to
14、tal volume of air passed through the tube, it is important that these, as well as other conditions, are accurately controlled. The percentage of carbon tetrachloride retained by the sample is calculated by dividing the weight of carbon tetrachloride retained by the weight of the original carbon samp
15、le and multiplying by 100. Calculations . Weight of activity tube = A (Refer to Step 7 of Procedure AZ 3 - 5). . Weight of sample = B (Refer to Step 14 of Procedure AZ 3 - 5) . Weight of activity tube, sample and retained carbon tetrachloride = C (Refer to Step 5 of Procedure AZ 3 - 5) . The activit
16、y is the percentage of carbon tetrachloride absorb ed by the sample at saturation. (Refer to Step 14 of Procedure AZ 3 - 5) 1. C - (A+B) = X 100 = % retained carbon tetrachloride B = retentivity 2. Working capacity = activity - retentivity. Chemicals, materials, parts, and equipment referenced in th
17、is document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD AZ 003-06 Page 4 of 5 Copyright 2000, Ford Global Technologies, Inc. RETENTIVITY OF ACTIVATED CARBON Figure 1 FORD LABORATORY TEST METHOD AZ 003-06 Page 5 of 5 Copyright 2000, Ford Global Technologies, Inc. RETENTIVITY OF ACTIVATED CARBON Figure 2
