CAJ | 학술논문

采用Agilent112-88A7 HP-88毛细管色谱柱的气相色谱和Avatar 370傅里叶转换红外光谱相结合的方法,对质子转移膜式电化学氢化制备的低反式脂肪酸的大豆油脂进行分析,其中气相色谱法中各脂肪酸的检出限为3.2～11.4μg/mL,相对标准偏差为0.30%～1.45%,试验表明两种方法对反式脂肪酸的定量结果一致;经过6 h的电化学氢化反应,当氢化大豆油脂的碘价由原料油的130.04 g I_2/100 g下降到88.86g I_2/100 g时,亚麻酸9c,12c,15cC18:3质量分数由6.84%下降到0.28%,硬脂酸C18:0质量分数由4.36%上升到10.44%,产品中反式脂肪酸质量分数为8.62%,主要是7.15%的9tC18:1,0.74%的9t,12tC18:2和0.36%的9t,12t,15tC18:3.
채용Agilent112-88A7 HP-88모세관색보주적기상색보화Avatar 370부리협전환홍외광보상결합적방법,대질자전이막식전화학경화제비적저반식지방산적대두유지진행분석,기중기상색보법중각지방산적검출한위3.2～11.4μg/mL,상대표준편차위0.30%～1.45%,시험표명량충방법대반식지방산적정량결과일치;경과6 h적전화학경화반응,당경화대두유지적전개유원료유적130.04 g I_2/100 g하강도88.86g I_2/100 g시,아마산9c,12c,15cC18:3질량분수유6.84%하강도0.28%,경지산C18:0질량분수유4.36%상승도10.44%,산품중반식지방산질량분수위8.62%,주요시7.15%적9tC18:1,0.74%적9t,12tC18:2화0.36%적9t,12t,15tC18:3.
The composition of soybean oil with reduced trans fatty acids(TFAs)produced by electrochemical hydrogenation via proton exchange membrane was analyzed.A detection limit 3.2～11.4μg/mL and a relative stand-ard deviation 0.30%～1.45%were obtained from gas chromatography.The data from GC with Agilent 112-88A7HP-88 capillary column was much correspondence with those from Avatar 370 Fourier transform infrared spectrosco-py.After 6 h process of electrochemical hydrogenation,hydrogenated soybean oil of Ⅳ 88.86(g I_2/100 g)wag yiel-ded flrom material oil of Ⅳ 130.04(g I_2/100 g).The content of 9c,12c,15c C18:3 in the hydrogenated soybean oil decreased fmm 6.84%to 0.28%,and the content of C18:0 increased from 4.36%to 10.44%.Results show the hy-drogenated soybean oil contains total TFAs of 8.62%,including 9tC18:1 of 7.15%,9t,12tC18:2 of 0.74%and 9t,12t,15tC18:3 of 0.36%.