Toxicity of Fire Retardant Chemicals to Aquatic Organisms: Progress Report
Table 10
Table 10. Summary of the ammonia characteristics of five fire retardant chemicals used in tests with neonate Daphnia magna exposed in ASTM soft and hard waters. A regression equation (in parenthesis) was fitted for each chemical tested using the total ammonia as nitrogen (NH3-N) concentrations determined at test initiation (N=4). Each regression model was used to predict NH3-N (mg/L) at the 48-hour EC50.
| Chemical | ||||||
| Fire-Trol GTS-R | ||||||
| Fire-Trol LCG-R | ||||||
| Phos-Chek D-75-F | ||||||
| Phos-Chek WD-881 | ||||||
| Silv-Ex | ||||||
|
1NH3-N = total ammonia as nitrogen (mg/L) used as dependent variable in regression model; EC50 = 48-hour EC50 (mg/L) used as independent variable in regression model; adjusted R2 = 1-(1-R2)(n-1/df error); 2pH range = lowest and highest pH measurements for each test at test initiation; 3Un-ionized ammonia = total ammonia adjusted for temperature and pH. | ||||||

