[1. Ayers, C. W.: Talanta 16 (1969) 1085.10.1016/0039-9140(69)80145-1]Search in Google Scholar
[2. Brunnemann, Klaus D., and Dietrich Hoffmann: J. Chromatogr. Sci. 13 (1975) 159.10.1093/chromsci/13.4.159]Search in Google Scholar
[3. Balleter, W. T., C. J. Bushman, and P. W. Tidwell: Anal. Chem. 33 (1961) 592.10.1021/ac60172a034]Search in Google Scholar
[4. Collins, P. F., W. W. Lawrence, and J. T. Williams: Beitr. Tabakforsdt. 6 (1972) 167.]Search in Google Scholar
[5. Sloan, C. H., and G. P. Morie: Ana1. Chim. Acta 69 (1974) 243.10.1016/0003-2670(74)80035-8]Search in Google Scholar
[6. Russell, J. A.: J. Bioi. Chem. 156 (1944) 457.10.1016/S0021-9258(18)51127-3]Search in Google Scholar
[7. Newsome, J. R., and C. H. Keith: Tob. Sci. IX (1965) 65.]Search in Google Scholar
[8. Jolly, William L.: The inorganic chemistry of nitrogen; W. A. Benjamin, Inc., New York, 1964.]Search in Google Scholar
[9. Sensabaugh, A. J., Jr., and R. H. Cundiff: Tob. Sci. 11 (1967) 25.]Search in Google Scholar