By Noyes W
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2019. 57 1269. 3 cm3/min) f o r Stoddard s o l v e n t was used t o c a l c u l a t e mg/m3 ( 4 ) . Since these are s i m i l a r m i x t u r e s , t h i s approach was taken t o c a l c u l a t e mg/m . I t should be noted i n Table VI and Table VII t h a t workers wore s u p p l i e d a i r systems when e n t e r i n g these high c o n c e n t r a t i o n areas. 3 D Conclusion It appears there would be s e v e r a l advantages i n using the proposed i n f r a r e d method: analyses c o u l d be performed much f a s t e r using the IR method.
9993 f o r peak h e i g h t measurement. l i n e a r r e s p o n s e was o n l y o b t a i n e d , h o w e v e r , i f t h e c o l u m n was conditioned d a i l y with several 5-yL i n j e c t i o n s of a r e l a t i v e l y A c o n c e n t r a t e d s o l u t i o n o f HCCP i n h e x a n e . T h e d e t e c t i o n l i m i t was a b o u t 5 ng/mL (25 p g i n j e c t e d ) . At t h i s l i m i t , the p r e c i s i o n of peak h e i g h t measurements c o r r e s p o n d e d to a r e l a t i v e s t a n d a r d d e v i a t i o n (RSD) o f 6% w i t h a r a t i o o f a b o u t 7 : 1 f o r p e a k h e i g h t to background n o i s e .
506-514. 2. Lubs, H. A. "The Chemistry of Synthetic Dyes and Pigments"; American Chemical Society Monograph No. , 1952. 3. Clayson, D. B. Prev. , 1976, 5, 228-244. 4. Haley, T. J. Clin. , 1975, 8, 13-42. 5. Case, R. A. M. Ann. R. Coll. , 1965, 39, 213-235. 6. Billiard-Duchesne, J. J. Urol. Med. , 1959, 65, 748-791. 7. Rinde, E; Troll, W. J. Nat. , 1975, 55, 181-182. 8. Hartman, C. ; Fulk, G. ; Andrews, A. W. Mutation Research, 1978, 58, 125-132. 9. " DHEW (NIOSH) Publication No. 34 CHEMICAL HAZARDS IN THE WORKPLACE 78-148, National Institute for Occupational Safety and Health, Cincinnati, OH, April 17, 1978.