A review.The factors that affect the stability of water-in-oil emulsions were mainly discussed.Through the anal. of emulsifiers, oil-phase raw materials, water-phase raw materials, powders and other raw material factors, as well as the process conditions such as temperature and viscosity in the preparation process, some phenomena were qual. explained.

Dangdai Huagong Yanjiiu

UPLC-DAD Determination of Five Essences in Milk Powder

Author: Yang Heng ; Zhao Yanbing ; Zhang Yanhua ; Gu Ya'nan

The method has been developed for the simultaneous determination of five essences in milk powder by high-performance liquid chromatog. with the diode array detector (UPLC-DAD).Firstly, the sample was extracted by ultrasound, and then purified by HLB solid phase extraction column.Agilent SB-Aq column (C18, 150mmx2.1mm, particle size 1.8μm), the mobile phase:methanol + 0.01 mM sodium dihydrogenphosphate (PH=2.9 adjusted by phosphoric acid), the flow rate:1.0mL♂min∼(-1) and the detection wavelength:278 nm were used.The linear range of five essences is from 0.2μg♂mL∼(-1)to 10μg♂mL∼(-1).The detection limit was 2.5mg♂kg∼(-1).The quant. limit was 7.5mg♂kg∼(-1).The average recovery was 83.1%∼ 88.1% and the precision was 2.8%∼7.3%.The method is easy to operate with high recovery rate and can be used to detect five essences simultaneously in milk powder.

Guangdong Huagong

Application of Fuzzy Mathematical Model in the Sensory Evaluation System of Lipstick

Author: Zhang Bo ; Du Yulan ; Fan Peihao ; Zhang Ranran

This paper applies the fuzzy mathematics theory, applies the fuzzy comprehensive evaluation method to the lipstick sensory evaluation system, and divides the evaluation system into several factors according to the actual situation of the lipstick sensory evaluation to realize the comprehensive evaluation of the lipstick sensory.The analytic hierarchy process(ahp) is used to calculate the weight set of evaluation, and a good result is obtained.

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