食品添加剂双乙酸钠的无溶剂合成新工艺研究

用醋酸、固体烧碱为原料,无溶剂法合成食品添加剂双乙酸钠。探索最佳工艺条件为:醋酸烧碱投料摩尔比2.05-2.15:1,反应时间2h,反应温度110-120℃。产品收率达到97%以上,质量符合联合国粮农组织（FAO）和世界卫生组织（WHO）双乙酸钠食品添加剂质量标准。      

新型食品添加剂双乙酸钠的合成研究

以醋酸和烧碱为原料、在水为溶剂的条件下制备双乙酸钠,系统地研究了原料配比、温度、时间等因素对产品质量及收率的影响,得到了最优化工艺条件。正交试验确定的优化合成条件是:n(醋酸)∶n(烧碱)=2.4∶1,反应温度100℃,反应时间120min。产物收率为94.15%,产品质量达到美国食品级标准。     

食品添加剂双乙酸钠的合成动力学研究

以醋酸-烧碱法合成双乙酸钠。在不同的原料配比下,测定双乙酸钠产率与反应时间的关系,进而确定反应的初速率;在不同的反应温度条件下,测定双乙酸钠产率和反应平衡常数,以此确定动力学方程中的待定参数。结果表明:利用动力学方程推导出来的数据结果能较准确的对实验结果进行验证。     

双乙酸钠的合成研究

以乙酸、碳酸钠为原料,水作溶剂一步合成双乙酸钠。对影响产品质量和收率的各种因素进行了系统的研究,经正交实验确定的优化工艺条件是:n(Na2CO3)∶n(CH3COOH)=0.26∶1;溶剂水的质量分率为10%;反应温度80℃、反应时间1.0h。母液全循环使用,产物总收率为98.8%。产品质量达到美国食品级指标。     

双乙酸钠的合成研究

以醋酸与碳酸钠的原料，用乙醇溶液作溶剂，合成双乙酸钠，产品质量符合指标要求，产品收率达９６％。     

新型饲料添加剂——双乙酸钠

新型饲料添加剂——双乙酸钠浙江省饲料监察所（３１０００４）屈健１概述双乙酸钠（ＳｏｄｉｕｍＤｉａｃｅｔａｔｅ，简称ＳＤＡ），又名二醋酸一钠，商品上也称维他可乐波（Ｖｉｔａ－Ｃｒｏｐ），其结构式为ＣＨ３ＣＯＯＨ·ＣＨ３ＣＯＯＮａ·ＸＨ２Ｏ，是一种分子化...     

双乙酸钠——多功能食品添加剂

介绍了双乙酸钠作为多功能食品添加剂的历史沿革和生产概况,着重阐述了双乙酸钠的防腐机理及其在食品生产中的应用.     

防霉剂双乙酸钠的合成及应用研究

提出了直接利用带结晶水的乙酸钠为原料合成双乙酸钠的新方法。并对双乙酸钠药效在谷物中的渗透性及药物的使用方法与防霉效果进行了研究。     

无溶剂法合成食品添加剂菜籽油蔗糖酯的研究

在碱催化条件下,先由甲醇和菜籽油反应制得脂肪酸甲酯.然后以脂肪酸甲酯和蔗糖为原料,在催化剂和乳化剂的作用下进行酯交换反应合成了蔗糖脂肪酸酯.详细考察了反应过程中乳化剂及催化剂用量,反应时间,反应温度,酯糖比,压力等因素对合成蔗糖酯产率的影响.确定了最佳的合成工艺条件,即乳化剂用量为反应物总质量的9%,催化剂用量为7%,反应温度130℃,反应时间5h,n(脂肪酸甲酯)∶n(蔗糖)=3∶1,压力4.45KPa.该条件下,菜籽油蔗糖酯的产率可高达72.4%,其临界胶束浓度(CMC)为1.86g/L,表面张力为29.4mN/m,乳化力为122s,亲水性能为9.86mL,HLB值为11.5.     

双乙酸钠生产新工艺

本文论述了双乙酸钠的制备工艺,采用醋酸－碳酸钠法,常温下反应,不需任何溶剂。法具有原材料成本低,操作简便,易于工业化生产等特点。     

双乙酸钠的防霉应用研究

研究了新型防霉剂双乙酸钠对黑曲霉、黑根霉、黄曲霉、球毛壳、扩展青霉等常见菌的抑制作用，并用目前应用广泛的防腐剂山梨酸钾与其作对照实验证明了双乙酸钠是一种优良的防腐剂．为其在食品、粮食、饲料等领域的防霉保鲜应用提供了一定的依据。     

双乙酸钠在大空间下分解动力学研究

研究了在55、65、75、85、95、105、115℃的大空间条件下双乙酸钠的分解实验,确定其分解反应为零级反应,并根据不同温度下的分解速率系数求出双乙酸钠的分解动力学方程.     

Gamma irradiation of fine-emulsion sausage containing sodium diacetate

Listeria monocytogenes, a psychrotrophic foodborne pathogen, is a frequent postprocess contaminant of ready-to-eat (RTE) meat products, including frankfurters and bologna. Ionizing radiation can eliminate L. monocytogenes from RTE meats. Sodium diacetate (SDA) incorporated into fine-emulsion sausages inhibits the growth of L. monocytogenes. Irradiation of L. monocytogenes suspended in SDA solutions resulted in synergistic reductions of the microorganism. L. monocytogenes populations were reduced by > 9 log10 units at a radiation dose of 1.5 kGy when suspended in 0.125% SDA solution. In contrast, the D10-values (the ionizing radiation doses required to reduce the population by 90%) were 0.58, 0.59, 0.57, and 0.53 kGy for L. monocytogenes populations suspended in emulsions containing 0, 0.125, 0.25, and 0.5% SDA, respectively. The D10-values for L. monocytogenes surface inoculated onto frankfurters dipped in 0, 0.125, 0.25, and 0.5% SDA solutions were 0.58, 0.53, 0.54, and 0.52 kGy, respectively. Postirradiation growth of L. monocytogenes suspended in beef bologna emulsion at 9 degrees C was dependent on SDA concentration and ionizing radiation dose. Very small, but statistically significant, changes in bologna redness, lipid oxidation, and shear force were observed for the beef bologna emulsion with the highest SDA concentration (0.5%) and irradiation dose (3.0 kGy). SDA can inhibit the proliferation of L. monocytogenes surviving the irradiation process with minimal impact on fine-emulsion sausage color, lipid oxidation, and firmness when used within regulatory limits.     

高效液相色谱法测定食品中双乙酸钠和 丙酸盐含量

目的 建立食品中双乙酸钠、丙酸钠（钙）同时测定的高效液相色谱检测方法。方法 样品中的双乙酸钠、丙酸钠（钙）经（1 1）盐酸溶液酸化后转化为乙酸与丙酸,使用有机溶剂进行萃取后在40℃下水浴挥干,浓缩后使用流动相定容,经C18色谱柱分离,在215nm波长处测定,外标法定量。结果 在优化的实验条件下,双乙酸钠和丙酸钠（钙）在0.5～5.0mg/mL范围内线性关系良好,相关系数均大于0.9998,方法的检出限为2mg/kg,加标回收率在87.3%～100.6%范围之内,相对标准偏差在0.89%～4.53%之间。结论 该方法前处理简便快速,定量准确可靠,灵敏度高,适用于各类食品中双乙酸钠、丙酸钠（钙）含量的同时测定。     

双乙酸钠防腐剂在酱油生产中的应用

双乙酸钠是FAO、WHO及我国政府批准使用的食品防腐剂 ,它集安全性、有效性、经济性于一身 ,将其作为酱油生产中的防腐剂 ,用量为 0 .0 5 %～ 0 .1% ,取得了较好的效果     

双乙酸钠对蛋糕防霉保鲜效果研究

通过稀释平板法定期检测蛋糕保藏过程中霉菌总数变化,研究了不同浓度的双乙酸钠对不同种类蛋糕防霉效果的影响.实验证明:双乙酸钠在普通面糊类蛋糕中的最佳防霉添加量为0.4%,此时蛋糕在常温下的霉菌超标时间为14 d,比不添加防腐剂的蛋糕延长10 d.0.4%双乙酸钠对三种不同配方蛋糕的防霉效果不尽相同,普通蛋糕优于戚风蛋糕,海绵蛋糕最差.     

双乙酸钠对鲜湿米粉条保鲜和品质的影响

研究山梨酸钾、脱氢乙酸钠、双乙酸钠以及丙酸钙对鲜湿米粉条的保鲜效果,结果显示,双乙酸钠保鲜效果最优,添加量为0.2g/kg,残留量未检出。探讨了双乙酸钠对鲜湿米粉条感官要求、理化指标及微生物指标的影响,结果表明,添加双乙酸钠后,显著降低了霉菌总数,鲜湿米粉条外观、色泽、气味、口味等感官要求均有明显改善,水分、酸度等理化指标变化很小。     

Inhibition of Listeria monocytogenes by sodium diacetate and sodium lactate on wieners and cooked bratwurst.

The inhibition of Listeria monocytogenes by sodium lactate and sodium diacetate was evaluated for wieners containing pork, turkey, and beef and for cooked bratwurst containing beef and pork. Both products were supplied by commercial manufacturers. Treated products were surface-inoculated with 10(5) CFU of L. monocytogenes per package and vacuum-packed in gas-impermeable pouches. Wieners were stored for 60 days at 4.5 degrees C, and bratwurst were stored for 84 days at 3 and 7degrees C. A surface treatment that consisted of dipping wieners into solutions containing < or = 6% lactate and < or = 3% diacetate for 5 s did not delay pathogen growth compared with that for untreated wieners. In additional trials, the antilisterial activity of lactate and diacetate in wiener and bratwurst formulations was evaluated. Lactate levels ranged from 1.32 to 3.4%, and diacetate was evaluated at 0.1 and 0.25%. The growth of L. monocytogenes was delayed for 4 and 12 weeks at 7 and 3 degrees C, respectively, on uncured, unsmoked bratwurst formulated with 3.4% lactate/0.1% diacetate, compared with 1 and 2 weeks, respectively, for the formulation containing 2% lactate. L. monocytogenes grew by > or = 1 log unit after 4 weeks' storage at 3 or 7 degrees C on cured, smoked bratwurst without lactate or diacetate, but growth was inhibited for 12 weeks on cured, smoked bratwurst formulated with 3.4% lactate and 0.1% diacetate. Sodium lactate levels of > or = 3% and combinations of > or = 1% lactate plus > or = 0.1% diacetate prevented listerial growth on wieners stored for 60 days at 4.5 degrees C. These results indicate that dipping wieners in lactate-diacetate solutions is not an efficient way to apply these antimicrobial agents to wieners. However, the inclusion of combinations of sodium lactate and sodium diacetate in wiener or bratwurst formulations inhibits the growth of L monocytogenes at < or = 7 degrees C, and an additional margin of safety was observed for products that are cured and smoked.     

Properties of refrigerated ground beef treated with potassium lactate and sodium diacetate

BACKGROUND: Ground meat is product that perishes easily and therefore various preservatives are applied to prolong its shelf life. The aim of this study was to investigate the effect of potassium lactate and sodium diacetate (Protec K‐DI preparation) on general proteolytic activity, protein degradation, texture, colour and water‐holding capacity of vacuum‐packaged ground beef. RESULTS: The activity of endogenous proteolytic enzymes, and hence the rate of protein hydrolysis changed significantly (P < 0.05) during refrigerated storage. The proteolysis was more intensive in the meat with the preservative than in a control sample. According to the results of SDS‐PAGE, the level of myosin in ground beef decreased with increasing storage time, whereas the preservative did not have a significant effect (P > 0.05) on these changes. However, its impact was the most significant in the case of tropomyosin and troponin T content, as well as changes of 30 kDa protein content. The preservative as well as the increase in storage time influenced an increase in content of polypeptides, peptides and some amino acids in the samples, and had an inhibiting effect on unfavourable changes in ground beef hardness. The preservative addition allowed the meat to maintain desired meat colour, and the main pigment during refrigerated storage was oxymyoglobin (MbO₂). CONCLUSION: Results showed that the Protec K‐DI preparation can be useful in minced meat production as a good stabiliser of colour and texture despite the increase observed in proteolytic activity after the preservative addition. Copyright © 2007 Society of Chemical Industry