Oo 
_ (8), an 
DETERIORATION OF CHLORINATED LIME 7 
potassium iodide solution, and a Meyer absorption tube (/), con- 
taining standard 0.1 N barium hydroxide solution. | 
The following method was used: 
_- Weigh 5 grams of the sample into the evolution flask (A), attach 
the stopper carrying the spray trap (Y) and soda-lime guard tube 
ig add 50 cubic centimeters of hydrogen peroxide solution 
through the dropping funnel ((). When action ceases, add 30 
cubic centimeters of dilute hydrochloric acid (1+3) and draw air 
slowly through the apparatus. The evolved gases are freed from 
chlorine by the potassium iodide wash bottles (#), and the carbon 
dioxide is absorbed in 50 cubic centimeters of standard barium 
hydroxide solution in the Meyer tube (/). Draw air through the 
Fic. 1.—Apparatus for the determination of carbon dioxide 
apparatus for 20 minutes, disconnect the Meyer tube, and pour its 
contents into a 500-cubic centimeter Erlenmeyer flask. Thoroughly 
wash the Meyer tube and add the washings to the contents of the 
flask. Titrate the solution without filtering off the precipitated 
carbonate, using 0.1 N hydrochloric acid and phenolphthalein as an 
indicator. 
Repeated determinations, both with and without filtering off the 
barium carbonate, gave check results. 
RESULTS OF INVESTIGATION 
The loss of available chlorine during storage is shown in Table 3 
and graphically in Ficures 2,3, 4, and 5. The results on the samples 
from packers C and D were not used in calculating the averages 
used in plotting the graph for the summer-packed material for the 
reasons given on page 14. 
