Fat crystals and emulsion stability — a review

The effects of fat crystals in food emulsion formation and stability are reviewed. Topics discussed in detail include fat crystal wettability, interfacial rheology, crystal microstructure, and particle location. Specifics on the potential future direction of the field are discussed.     

Physicochemical properties of whey protein conjugated with starch hydrolysis products of different dextrose equivalent values

Conjugation of whey protein with maltodextrin (MD) or corn syrup solids (CSS) having dextrose equivalent (DE) values in the range 6–38 was achieved by heating solutions of 5% whey protein isolate and 5% MD or CSS, initial pH 8.2, at 90 °C for up to 24 h. Maximum conjugation, with production of limited colour and advanced Maillard products was achieved after 8 h of heating. The extent of conjugation increased with increasing DE value of the MD and CSS ingredients. Conjugation increased whey protein solubility at pH 4.5 from 9% for whey protein heated alone to 24% for whey protein heated in the presence of CSS38 at 90 °C for 8 h. Conjugation of whey proteins with MD6 or CSS38 enhanced the stability to heating of protein solutions at 85 °C for 3 min with 50 mm added NaCl.     

液相色谱-高分辨质谱技术在兽药残留检测中的研究进展

随着社会经济的快速发展,人民生活水平不断提高,对动物源性食品的需求量也不断增加,动物源性食品中兽药残留问题也越来越受重视,对兽药残留的监督检验工作也提出了更高的要求。高分辨质谱具有极强的化合物检索能力,能够在无标准品的情况下实现多种兽药的非靶向筛查确证,很好地弥补了三重四极杆质谱检测宽泛性差、未知化合物筛查能力欠缺的缺点,是兽药残留风险监测和高通量筛查的重要技术手段。本文通过综述2018—2021年液相色谱-高分辨质谱技术在兽药残留检测领域中的应用情况,对高分辨质谱的优势和特点进行系统阐述。随着高分辨质谱仪的普及和检测技术的发展,高分辨质谱技术将可能作为常规检测方法被广泛应用于兽药残留检测领域。     

食用油中苯并（a）芘分子印迹固相萃取法测定过程中的污染溯源分析

对食用油中苯并（a)芘分子印迹固相萃取法测定过程中的试剂及耗材进行污染溯源分析。结果表明：分析纯试剂及一次性注射器中的橡胶是污染的主要来源,二氯甲烷(分析纯)、正己烷(分析纯)、橡胶的苯并（a）芘平均峰面积分别为0.261、0.710、2.550 mV·min,分别是国标方法检出限的0.9、2.4、8.7倍,对检测结果准确性带来严重影响。因此,提出使用高速离心替代过滤膜方式除杂以除去样液中微小颗粒物,该方案既能避免注射器带来的污染,又能保证高效液相色谱系统稳定运行,提高检验结果准确性。