共查询到20条相似文献，搜索用时 0 毫秒
1.
S. K. Hagen 《Fresenius' Journal of Analytical Chemistry》1929,77(5-6):234-235
Ohne Zusammenfassung 相似文献
2.
3.
E. Rupp 《Analytical and bioanalytical chemistry》1917,56(2):114-114
4.
5.
6.
7.
8.
D. Jentzsch 《Fresenius' Journal of Analytical Chemistry》1957,158(2):124-125
Ohne Zusammenfassung 相似文献
9.
10.
Rudolf Lang 《Fresenius' Journal of Analytical Chemistry》1933,93(1-2):21-31
Ohne Zusammenfassung 相似文献
11.
12.
13.
A. Kurtenacker 《Fresenius' Journal of Analytical Chemistry》1955,144(6):432
Ohne Zusammenfassung 相似文献
14.
15.
16.
E. Rupp G. Siebler und O. L. Barnebey 《Fresenius' Journal of Analytical Chemistry》1924,65(5):191-192
Ohne Zusammenfassung 相似文献
17.
Erich Müller und Gustav Wegelin 《Fresenius' Journal of Analytical Chemistry》1911,50(10):615-623
Ohne Zusammenfassung 相似文献
18.
β-Aminocrotonic esters are of great importance as stabilizers for the production of clearly transparent food packaging of PVC. For the purpose of studying the migration into foods a thin-layer Chromatographic and a polarographic method were elaborated. The TLC method consists of the visual comparison of the intensity of the spots after treatment with Fast Blue B salt. The polarographic determination is carried out after nitrosation of the stabilizer. By the TLC method 10?7 g of ester per spot are still detectable; the concentration which is still determinable by cathode-ray polarography is 5×10?7 g of ester and by conventional d.c. polarography 5×10?6g of ester per ml of final solution. After extraction with acetonitrile traces of the stabilizer which are migrated into edible oil are still determinable down to 2 ppm by the methods described. 相似文献
19.
Fred P. Dewey 《Fresenius' Journal of Analytical Chemistry》1891,30(1):344-347
Ohne Zusammenfassung 相似文献
20.
H. -J. Drewitz 《Fresenius' Journal of Analytical Chemistry》1963,198(3):294-295
Ohne Zusammenfassung 相似文献