排序方式： 共有4条查询结果，搜索用时 15 毫秒
1
1.
2.
Analytical methods for the determination of total and water insoluble combined lactic acid in lactic acid modified fatty glycerides
are described. The acids are liberated from their esters by saponification. Lactic acid is determined by simple acid-base
titration after removal of fatty acids via liquid-liquid extraction. Water soluble constituents are extracted from a dichloro-methane
solution of the esters with 5% aqueous sodium sulfate prior to determination of water insoluble lactic acid. Methods are rapid,
simple, and suitable for use in a plant control laboratory. Extension of the procedure provides for the simultaneous determination
of fatty acid and glycerine on a single sample. 相似文献
3.
Charles F. Smullin Ludwig Hartmann Ray S. Stetzler 《Journal of the American Oil Chemists' Society》1958,35(4):179-182
Summary Paper chromatography has been found to be a very satisfactory method for the separation of glycerine from hexitols, pentitols,
tetritols, and glycols. After separation of the glycerine on paper the glycerine is eluted from the indicated zone with water.
The formaldehyde, which is a product of periodic acid oxidation, is determined colorimetrically. A suggested procedure and
the results of the analyses of standard glycerine and polyhydric alcohol mixtures are presented in this paper. The results
indicate that the glycerine content of the mixtures (glycerine content ranging from 15% to 100% glycerine) may be determined
with an average relative precision of 0.7% and with an average recovery of 101.0%. 相似文献
4.
Programmable DSPs are pervasive in the wireless handset market for digital cellular telephony. We present the argument that DSPs will continue to play a dominant, and in fact increasing, role in wireless communications devices by looking at the history of DSP use in digital telephony, examining the DSP-based solution options for today's standards, and looking at future trends in low-power DSPs 相似文献
1