Anal. Chem. 1980, 52, 1965-1966
compounds of higher molecular weight, but 5,6-dibenzoquinoline, for example, gave plate heights around 0.14 mm at 1 mL/min. T h e same column has been used repeatedly over 2 years with no repacking and no observable loss of efficiency. Porous polymer columns are easy to pack and to handle and show considerable promise for the liquid chromatography of basic compounds with alkaline eluents.
1 . 5 ~
I
1985
%PAPAVERINE
LITERATURE C I T E D 051
, 40
50 V O L . % C H 3 CN
60
Figure 5. Capacity factors and solvent composition. Ammonia concentration was 0.025 M, 65 OC.
Table I. Capacity Factors, k ’ , for Various Compounds compd and conditionsa
k‘
(1) Pietrzyk, D. J.; Kroeff, E. P.; Rotsch, T. D. Anal. Chem. 1978, 50, 497. (2) Hanai, T.; Walton, H. F.; Navratil, J. D.; Warren, D. J. Chromatogr. 1978, 155. 261. (3) Walton, H. F.; Eiceman, G. A,: Otto, J. L. J , Chromatogr. 1979, 180, 145. (4) Baum, R. G.; Saetre, E. P.; Cantwell, E. F. Anal. Chem. 1980, 52, 15. (5) Matsuda, R.; Yamamiya, T.; Tatsuzama, M.; Ejirna, A,; Takai, N. J . Chromatogr. 1979, 173, 75. (6) Seta, K.;Washitake, M.; Anmo, T.; Takai, N.; Okuyama, T. Bunsekl Kagaku 1978, 27, 73. (7) Knox, J. H.; Jurand, J. J . Chromatogr. 1973, 82, 398. (8) Knox. J. H.; Pryde, A. J . Chromatogr. 1975, 112, 171. (9) Wheals. B. B. J . Chromatogr. 1978. 122, 85. (10) Wu, C . Y.; Wittick, J. J. Anal. Chem. 1977, 49. 359. (11) Nobuhara. Y.; Hirano, S.; Namba. K.; Hashimoto, M. J . Chromatogr. 1980, 190, 251. (12) Wittmer. D. P.; Nuessle, N. 0.; Haney, W. G. Anal. Chem. 1975, 47,
30% CH,CN, 5 5 ° C tyramine 0.4 0.8 norephedrine ephedrine 1.8 atropine 3.9 amphetamine 4.0 metaphe tamine 7.3 strychnine 8.4 cinchonine 10.4 quinine 12.6 60% CH,CN, 25 C yohimbine 2.6 reserpine 11.7 60% CH,CN, 65 C 2,4,6-trimethylpyridine 3.2 2-methylquinoline 4.5 5,6-dibenzoquinoline 12.5 acridine 13.0 a The first two eluents were 0.02 M in tetrabutylammonium hydroxide; the third was 0.02 M in ammonia.
Chemistry Department Box 215 University of Colorado Boulder, Colorado 80309
T h e retention of other basic nitrogen compounds is shown in Table I. T h e porous polymer column gives good chromatography of many alkaloids, drugs, and environmental contaminants. T h e plate numbers were naturally larger for
RECEIVED for review March 10, 1980. Accepted July 7, 1980. This work was supported by the National Science Foundation, Grant No. CHE 76-08933.
1422
(13) Oleman, C.; k a t , L.; Waliszewski, K.; Beyerman, H. C. J . Chromatogr. 1977, 133, 382. (14) Gfeller, J. C.: Huen, J. M.; Thevenin, J. P. J . Chromatogr. 1978, 166, 133. (15) Hara. S.; Yamauchi, N.: Nakae, C.; Sakai, C. Anal. Chem. 1980, 52, 33.
’
Present address: Chemistry Department, University of Montreal, Case Postale 6210, Succ. A, Montreal, H3C 3V1, Canada.
Kazuko Aramaki T o s h i h i k o Hanai’ H. F. Walton*
Nomenclature System for the Low-Power Argon Inductively Coupled
Sir: Since its introduction by Greenfield, Jones, and Berry in 1964 ( 1 ) and by Wendt and Fassel in 1965 ( 2 ) ,inductively coupled plasma optical emission spectroscopy (ICP-OES) has developed into an accepted analytical tool. I n the present work we describe a nomenclature system applicable to the popular low-power (
