Fluid shortening is an important ingredient in the production of sponge cake. Peanut oil with 0, 43% and 85% of diacylglycerol content was used as the base oil. Different emulsifiers, such as glycerol monostearate, so...Fluid shortening is an important ingredient in the production of sponge cake. Peanut oil with 0, 43% and 85% of diacylglycerol content was used as the base oil. Different emulsifiers, such as glycerol monostearate, soy lecithin and sucrose ester, and their respective amounts, were investigated. It was found that the addition of emulsifiers had a positive effect on water-absorbing capacity, air-absorbing capacity and viscosity of the oils. Glycerol monostearate was the preferred emulsifier for fluid shortening with a recommended addition of 1.5%. The effects of different diacylglycerol content on fluid shortening and their impact on sponge cake production was also investigated. The onset oxidation temperature of the oil could be increased from 253.21 ℃ for PO-TAG-based fluid shortening to 263.70 ℃ for PO-DAG85-based fluid shortening. And the increase in diacylglycerol content leading to a lower specific gravity of the batter, which was 1.06 g/mL, 1.02 g/mL and 0.98 g/mL prepared by PO-DAG, PO-DAG43 and PO-DAG85 shortening, respectively. The results showed that diacylglycerols can be used as base oils in fluid shortening to improve the crystal network and stability of fluid shortenings, thereby reducing the specific gravity of the batter and improving the structural properties of the cake. This will extend the potential applications of diacylglycerols and increase the variety of base oils available for fluid shortening preparation.展开更多
目的建立通过式固相萃取-高效液相色谱法同时测定糕点中7种天然抗氧化成分和8种合成抗氧化剂的定量分析方法。方法目标物采用1%乙酸乙腈溶液提取,用通过式亲水亲油平衡(hydrophilic and oleophilic balance,HLB)固相萃取柱净化,净化液...目的建立通过式固相萃取-高效液相色谱法同时测定糕点中7种天然抗氧化成分和8种合成抗氧化剂的定量分析方法。方法目标物采用1%乙酸乙腈溶液提取,用通过式亲水亲油平衡(hydrophilic and oleophilic balance,HLB)固相萃取柱净化,净化液浓缩处理后供高效液相色谱仪分析,15种目标物以0.5%甲酸溶液-甲醇为流动相梯度洗脱,C18色谱柱分离,二极管阵列检测器280 nm处测定。结果15种抗氧化成分在1~50μg/mL范围内有良好的线性关系,表没食子酸儿茶素的检出限(limit of detection,LOD)为2 mg/kg,定量限(limit of quantification,LOQ)为5 mg/kg,其余14种化合物的LOD为0.2 mg/kg,LOQ为0.5 mg/kg;各组分的平均回收率为88.10%~94.73%,相对标准偏差(relative standard deviations,RSDs)≤5.2%。结论本方法具有快速简单、高灵敏度、重现性好等优点,对糕点中抗氧化剂含量的检测具有很好的实用价值,同时为糕点的质量安全提供了有效的技术支持。展开更多
基金The Bureau of Science and Information of Guangzhou under grant 2024A04J3254the National Natural Science Foundation of China under grant 32272341the Department of Science and Technology of Guangdong Province under grant numbers 2022B0202010003。
文摘Fluid shortening is an important ingredient in the production of sponge cake. Peanut oil with 0, 43% and 85% of diacylglycerol content was used as the base oil. Different emulsifiers, such as glycerol monostearate, soy lecithin and sucrose ester, and their respective amounts, were investigated. It was found that the addition of emulsifiers had a positive effect on water-absorbing capacity, air-absorbing capacity and viscosity of the oils. Glycerol monostearate was the preferred emulsifier for fluid shortening with a recommended addition of 1.5%. The effects of different diacylglycerol content on fluid shortening and their impact on sponge cake production was also investigated. The onset oxidation temperature of the oil could be increased from 253.21 ℃ for PO-TAG-based fluid shortening to 263.70 ℃ for PO-DAG85-based fluid shortening. And the increase in diacylglycerol content leading to a lower specific gravity of the batter, which was 1.06 g/mL, 1.02 g/mL and 0.98 g/mL prepared by PO-DAG, PO-DAG43 and PO-DAG85 shortening, respectively. The results showed that diacylglycerols can be used as base oils in fluid shortening to improve the crystal network and stability of fluid shortenings, thereby reducing the specific gravity of the batter and improving the structural properties of the cake. This will extend the potential applications of diacylglycerols and increase the variety of base oils available for fluid shortening preparation.
文摘目的建立通过式固相萃取-高效液相色谱法同时测定糕点中7种天然抗氧化成分和8种合成抗氧化剂的定量分析方法。方法目标物采用1%乙酸乙腈溶液提取,用通过式亲水亲油平衡(hydrophilic and oleophilic balance,HLB)固相萃取柱净化,净化液浓缩处理后供高效液相色谱仪分析,15种目标物以0.5%甲酸溶液-甲醇为流动相梯度洗脱,C18色谱柱分离,二极管阵列检测器280 nm处测定。结果15种抗氧化成分在1~50μg/mL范围内有良好的线性关系,表没食子酸儿茶素的检出限(limit of detection,LOD)为2 mg/kg,定量限(limit of quantification,LOQ)为5 mg/kg,其余14种化合物的LOD为0.2 mg/kg,LOQ为0.5 mg/kg;各组分的平均回收率为88.10%~94.73%,相对标准偏差(relative standard deviations,RSDs)≤5.2%。结论本方法具有快速简单、高灵敏度、重现性好等优点,对糕点中抗氧化剂含量的检测具有很好的实用价值,同时为糕点的质量安全提供了有效的技术支持。
