TABLE 3. 



RESULTS OF ANALYSIS OF FORMULATED DIETS IN THE TWO-YEAR FEED STUDIES OF 



NITROFURANTOIN 



Date Mixed 



600 



Concenlratlon of Nitrofurantoin in Feed 

 for Target Concentration (ppm) (a) 



1,300 



2,500 



02/11/81 

 02/18/81 



03/18/81 

 04/15/81 



05/13/81 

 05/18/81 

 05/19/81 

 06/10/81 



07/08/81 

 08/05/81 



09/02/8 1 

 09/30/81 



1 0/28/K 1 

 10/;iO/Hl 

 ll/lH/81 



12/16/81 

 02/10/82 



02/12/82 

 04/07/82 



06/02/82 

 07/28/82 

 09/22/82 

 11/17/82 

 01/12/83 

 01/18/83 



602 

 600 



(b)680 

 (c)490 

 (dl596 



608 

 630 

 593 



605 

 541 



578 

 570 

 602 

 609 

 587 

 618 



Mean (ppm) 



Standard deviation 



CoetTicient of variation (percent) 



Range (ppm) 



Number of samples 



602 

 31.4 

 5.2 

 541-680 

 14 



(a) Results of duplicate analysis 



(b)Out of specifications; not used in study. 



(c) Remix out of specifications; not u.sed in study or included in the mean. 



(dl Remix; not included in the mean, 



(e) Result of triplicate analysis 



within specifications 94*^ of the time Referee 

 analyses were performed periodically by the 

 analytical chemistry laboratory. Good agree- 



ment was generally found between the labora- 

 tories (Table 4). 



Nitrofurantoin, NTP TR 341 



28 



