油(you)脂(zhi)煙(yan)點儀表明煙(yan)點高的(de)(de)(de)油(you)脂(zhi)做出來的(de)(de)(de)東西比較(jiao)美味但一味追(zhui)求高煙(yan)點的(de)(de)(de)油(you)脂(zhi)產品，必將受(shou)加工(gong)(gong)(gong)過(guo)程高溫的(de)(de)(de)影響，若工(gong)(gong)(gong)藝(yi)條件(jian)控制不當，不但使油(you)脂(zhi)發生雙鍵的(de)(de)(de)異構化及聚(ju)合(he)，熔(rong)點升高，降低消化吸收率和營養(yang)價值，而且使油(you)中的(de)(de)(de)天然抗(kang)氧化劑(ji)大(da)大(da)減少，儲存(cun)安定性降低，含油(you)食(shi)(shi)品貨(huo)架期(qi)縮短(duan)。因此，必須綜合(he)考慮(lv)油(you)脂(zhi)產品的(de)(de)(de)各(ge)(ge)項(xiang)質量指標，選好(hao)工(gong)(gong)(gong)藝(yi)并(bing)把握(wo)好(hao)油(you)脂(zhi)精煉各(ge)(ge)工(gong)(gong)(gong)序的(de)(de)(de)工(gong)(gong)(gong)藝(yi)條件(jian)，才能得到既(ji)品質良好(hao)，又有較(jiao)長儲存(cun)期(qi)的(de)(de)(de)食(shi)(shi)用(yong)油(you)脂(zhi)產品。　

油(you)(you)脂(zhi)煙(yan)點(dian)儀表明(ming)(ming)(ming)新鮮的高(gao)煙(yan)點(dian)油(you)(you)脂(zhi)，其(qi)熱(re)穩定(ding)(ding)(ding)性暫時較好(hao)(hao)，并不能(neng)說明(ming)(ming)(ming)它的氧(yang)(yang)化穩定(ding)(ding)(ding)性就好(hao)(hao)，油(you)(you)脂(zhi)的氧(yang)(yang)化穩定(ding)(ding)(ding)性差了，氧(yang)(yang)化分解將導致其(qi)熱(re)穩定(ding)(ding)(ding)性變差，煙(yan)點(dian)降(jiang)低(di)。一(yi)些(xie)(xie)煙(yan)點(dian)較高(gao)的精煉油(you)(you)品(pin)，其(qi)風味并不優(you)于(yu)同種油(you)(you)脂(zhi)煙(yan)點(dian)稍低(di)的油(you)(you)品(pin)，而且(qie)其(qi)貨(huo)架壽命(ming)遠遠低(di)于(yu)煙(yan)點(dian)低(di)的油(you)(you)品(pin)。有的廠家(jia)同批大豆的二級(ji)油(you)(you)在(zai)(zai)低(di)溫(wen)下透(tou)明(ming)(ming)(ming)度(du)(du)尚好(hao)(hao)，無(wu)析(xi)出(chu)物，而高(gao)烹(peng)油(you)(you)在(zai)(zai)低(di)溫(wen)下透(tou)明(ming)(ming)(ming)度(du)(du)降(jiang)低(di)、混濁(zhuo)、析(xi)出(chu)微(wei)晶(jing)，這(zhe)正是加工過(guo)程(cheng)中異構化或(huo)聚合反應所導致的部分油(you)(you)脂(zhi)熔點(dian)升(sheng)高(gao)的結果。這(zhe)些(xie)(xie)高(gao)熔點(dian)的油(you)(you)脂(zhi)消化吸收率(lv)較低(di)，易積存在(zai)(zai)內(nei)臟周圍，或(huo)在(zai)(zai)血(xue)液中與膽固(gu)醇協同沉積在(zai)(zai)血(xue)管壁上，導致動脈(mo)粥樣硬化、心血(xue)管疾病。因而在(zai)(zai)生產過(guo)程(cheng)中煙(yan)點(dian)需要進行合理的控制，而不是一(yi)味的追求高(gao)煙(yan)點(dian)。

儀器名稱：油脂煙點儀

儀器型號：YD-2

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