大豆油脱臭及馏出物捕集工艺对产物品质的影响

    EFFECT OF SOYBEAN OIL DEODORIZATION AND DISTILLATE TRAPPING PROCESS ON THE QUALITY OF PRODUCTS

    • 摘要: 对比研究了大豆油脱臭及脱臭馏出物捕集工艺对脱臭成品油及馏出物冷凝捕集液中邻苯二甲酸酯类(PAEs)塑化剂、维生素E(VE)、植物甾醇含量的影响。结果表明:两级双温蒸馏脱臭(200 ℃、90 min,260 ℃、30 min)与常规的单温蒸馏脱臭(120 min,240、250、260 ℃)相比,在真空度、蒸汽通量一定的条件下,双温脱臭可使∑8PAEs脱除率提高4.7~22.6个百分点,VE保留率提高5.5~13.1个百分点,甾醇保留率提高6.3~13.4个百分点,反式脂肪酸含量降低0.11~1.04个百分点,双温脱臭工艺在提升大豆油安全品质和营养品质方面优于单温脱臭。在单温蒸馏脱臭条件下,脱臭馏出物两级双温冷凝捕集工艺(120℃、40℃)与单级冷凝捕集(40℃)相比,一级捕集液(SODD1)和二级捕集液(SODD2)中∑8PAEs含量均显著低于单级捕集液(SODD)中的,在脱臭温度为260℃时,蒸馏回收的SODD中∑8PAEs含量为49.969 mg/kg,分别为SODD1和SODD2中的2.98倍和1.58倍,SODD1中∑8PAEs含量为16.741 mg/kg,仅是SODD2中含量的50%,SODD1和SODD2中VE和甾醇含量分别为1 269.2、1 336.9 mg/100 g和769.4、995.9 mg/100 g,虽然含量均低于SODD中的,但SODD1的低PAEs含量优势显著提升了其作为食用级原料的安全品质。

       

      Abstract: The effect of soybean oil deodorization and distillates trapping process on the contents of eight phthalic acid esters (PAEs),vitamin E and phytosterol in deodorized oil and deodorizer distillates condensate trapping fluid were investigated.The results showed that compared with deodorization by single temperature (240,250,260℃),the dual-temperature deodorization (200℃,90 min;then 260℃,30 min) could improve the removal rate of∑8PAEs by 4.7-22.6 percent points,and the retention rate of vitamin E and phytosterol by 5.5-13.1percent points and 6.3-13.4 percent points,respectively,while the content of trans fatty acid decreased by 0.11-1.04 percent points.The dual-temperature deodorization process was superior to single temperature deodorization on improving the safety and nutritional quality of soybean oil.Moreover,the contents of ∑ 8PAEs in the trapping fluid of soybean oil deodorizer distillates of two-stage dual-temperature condensation trapping processes (SOOD1,SODD2)(120℃,40℃) were both significantly lower than the single-stage condensate trapping fluid (SODD)(40℃).The content of∑8PAEs in SOOD was 2.98 and 1.58 times of those in SOOD1 and SODD2,respectively,and the content of ∑ 8PAEs in SOOD1 was 16.741 mg/kg,which was only half of that in SODD2.The contents of VE and sterol in SODD1 were 1269.2 and 1336.9 mg/100 g respectively,while in SODD2 were 769.4 and 995.9 mg/100 g respectively,Although the contents of VE and sterol were lower than those in SODD,the lower PAEs content of SODD1 significantly improved the safety quality of SODD1 as food grade raw material.

       

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