共 50 条
- [44] Article on micro nitrogen determination according to Kjeldahl BIOCHEMISCHE ZEITSCHRIFT, 1936, 285 (5/6): : 390 - 406
- [46] The determination of nitrogen in creatine according to Kjeldahl. HOPPE-SEYLERS ZEITSCHRIFT FUR PHYSIOLOGISCHE CHEMIE, 1903, 39 (3/4): : 329 - 335
- [49] PERCENTAGE OF NITRATE NITROGEN IN TOTAL NITROGEN-DETERMINATION BY KJELDAHL METHOD ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 1989, 33 (03): : 159 - 168