Objective: To study wholesome elements and heavy metals in red soybean of Heilongjiang Province. Methods: Samples preparation with hydrodigestion, and twenty-four elements quantitative analysis in red soybean by induc...Objective: To study wholesome elements and heavy metals in red soybean of Heilongjiang Province. Methods: Samples preparation with hydrodigestion, and twenty-four elements quantitative analysis in red soybean by inductively coupled plasma mass spectrometry technique (ICP-MS) with indium, platinum, ruthenium as internal standard. Results: The red soybean contained many elements necessary to human health, the sequence of elements (higher than mg/kg) was K > Mg > Ca > Fe ≈ Zn > Na > Mn > Ti > Cu > Sr ≈ Ni > Ba > Mo. Besides the trace elements, the contents of heavy metals were very low than National standard. With reference standard substance and added standard recovery for the quality control of analytical method, the results were credibility, recovery 85% - 114%, the detect limit 0.2 - 20 ng/g, linearity range 0 - 200 μg/g (r > 0.999), RSD (n = 6) Conclusion: The established method could be applied to the element quantitative analysis in food, simple and high sensitivity.展开更多
辣椒红色素(paprika red pigment,PRP)是一种安全性好,且有一定营养价值和药理作用的天然食用色素。PRP的水不溶性限制了其应用和推广,若将其转化为水分散性的乳状液,则可以提高PRP的利用率。文章以乳化活性和乳化稳定性为检测指标,...辣椒红色素(paprika red pigment,PRP)是一种安全性好,且有一定营养价值和药理作用的天然食用色素。PRP的水不溶性限制了其应用和推广,若将其转化为水分散性的乳状液,则可以提高PRP的利用率。文章以乳化活性和乳化稳定性为检测指标,分别研究了乳化时间、乳化温度、乳化转速、p H、油水比及大豆分离蛋白(Soybean protein isolate,SPI)浓度对SPI乳化PRP的影响。结果表明,将PRP按与SPI比为1∶2.4、1∶1.6或1∶1.2(w/w)的比例添加到p H为8.5、浓度的2.4%的SPI溶液中,于55℃~75℃和10000~14000r/min下高速分散乳化20min后形成PRP乳状液,此时SPI的乳化性能较强,乳状液的乳化稳定性较高,所得PRP乳状液分布较均一,液滴分散度较高。展开更多
文摘Objective: To study wholesome elements and heavy metals in red soybean of Heilongjiang Province. Methods: Samples preparation with hydrodigestion, and twenty-four elements quantitative analysis in red soybean by inductively coupled plasma mass spectrometry technique (ICP-MS) with indium, platinum, ruthenium as internal standard. Results: The red soybean contained many elements necessary to human health, the sequence of elements (higher than mg/kg) was K > Mg > Ca > Fe ≈ Zn > Na > Mn > Ti > Cu > Sr ≈ Ni > Ba > Mo. Besides the trace elements, the contents of heavy metals were very low than National standard. With reference standard substance and added standard recovery for the quality control of analytical method, the results were credibility, recovery 85% - 114%, the detect limit 0.2 - 20 ng/g, linearity range 0 - 200 μg/g (r > 0.999), RSD (n = 6) Conclusion: The established method could be applied to the element quantitative analysis in food, simple and high sensitivity.
文摘辣椒红色素(paprika red pigment,PRP)是一种安全性好,且有一定营养价值和药理作用的天然食用色素。PRP的水不溶性限制了其应用和推广,若将其转化为水分散性的乳状液,则可以提高PRP的利用率。文章以乳化活性和乳化稳定性为检测指标,分别研究了乳化时间、乳化温度、乳化转速、p H、油水比及大豆分离蛋白(Soybean protein isolate,SPI)浓度对SPI乳化PRP的影响。结果表明,将PRP按与SPI比为1∶2.4、1∶1.6或1∶1.2(w/w)的比例添加到p H为8.5、浓度的2.4%的SPI溶液中,于55℃~75℃和10000~14000r/min下高速分散乳化20min后形成PRP乳状液,此时SPI的乳化性能较强,乳状液的乳化稳定性较高,所得PRP乳状液分布较均一,液滴分散度较高。