Downloaded from https://www.everyspec.com MIL-STD-2031(SH) the animal’s exploratory twhavior surroundings); righting reflex (animal (characterized by trying to escape and exploring his shall be placed on his back and the ability to right himself shall be scored as rapid, slow or non-existent); or, posture (animal shall be lifted-from ;able by his tail imd pla~d back on table noting irregularities such as limp hind legs). After checking these responses, the animals shall bc returned to their cages nnd weighed daily fc)r 14 days. If still losing weight on day 14, they shall be kept until they show signs of recovery (three successive days of weight gain) or die.
Animals shall not be used in more than one experiment. 40.9 Post-test time-weighted avemge procedurw Immediately following the animal test, the quartz beaker shall be removed from the furnace, allowed to cool, and then weighed to determine the mass of material consumed. (The beaker and material shall also be weighed before the experiment). The average 30 minute (animal expsure time) concentrations of CO, C02, 02, and HCN shall be calculated acmrding to the following equation: n G = z [Cj * A tj]i j=l i = (CO, C02 02, HCN) 30 where: Cj = gas concentration of ith species during A time intend ,. ,.
= measurement time for the jth interval (minute) n = number of readings, such that ;ti =30 If none of the exposed animals die either during the exposure or within 24 hours post-exposure perio& then the predicted IXW value shall be estimated adequately. If one or more of the animaIs die at 80 percent of the predicted L.C50 value, then other gases may be acting in conjunction with the major gases measured. In this case or in the case anima!s die during the 14 day post-exposure monitoring period, further animal tests may be necessary. 50. REPORT 50.1 Repeat eontenta. The following performed on each material: data shall be included in a report for each test a.
Description of the material tested b. Autoignit ion temperature 46