在標準光源箱中檢測鮮切面的顏色

面條色澤是面條重要感官評價指標，直接影響人們對面條質量優劣的判斷，同時面條在加工和放置過程中的褐變不僅影響面條的感官質量，使面條風味變劣，內含蛋白質的營養價值降低，還會影響鮮濕面條的貨架期，是面條加工和銷售中急需解決的問題。因此，為了準確的評定鮮切面的顏色，就可以在標準光源箱中對鮮切面的顏色進行檢測。

鮮切面顏色檢測的重要性：

面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)是(shi)我國人(ren)民的(de)(de)(de)(de)傳(chuan)統主食，其加(jia)(jia)(jia)工(gong)(gong)制(zhi)作(zuo)已有2000多(duo)年的(de)(de)(de)(de)歷(li)史。長(chang)期以來(lai)，面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)以制(zhi)作(zuo)簡單、食用方(fang)(fang)便、風味(wei)獨特而(er)(er)(er)深受(shou)廣大人(ren)民群(qun)眾喜愛(ai)，根據其加(jia)(jia)(jia)工(gong)(gong)工(gong)(gong)藝不同，面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)分(fen)為干面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)（掛面(mian)(mian)(mian)(mian)(mian)(mian)(mian)）和(he)鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)。掛面(mian)(mian)(mian)(mian)(mian)(mian)(mian)由于(yu)制(zhi)作(zuo)時加(jia)(jia)(jia)水(shui)(shui)較(jiao)少，面(mian)(mian)(mian)(mian)(mian)(mian)(mian)筋(jin)形成不充(chong)(chong)分(fen)，因(yin)此普遍存在(zai)不耐(nai)煮、易(yi)混湯(tang)、筋(jin)性(xing)弱、咬(yao)勁(jing)差等缺點(dian)；鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)制(zhi)作(zuo)時加(jia)(jia)(jia)水(shui)(shui)較(jiao)多(duo)，面(mian)(mian)(mian)(mian)(mian)(mian)(mian)筋(jin)形成較(jiao)充(chong)(chong)分(fen)，因(yin)而(er)(er)(er)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)耐(nai)煮、筋(jin)性(xing)較(jiao)強(qiang)、不易(yi)混湯(tang)，而(er)(er)(er)且新(xin)(xin)鮮(xian)(xian)、爽(shuang)口(kou)，有嚼勁(jing)，口(kou)感明顯優于(yu)掛面(mian)(mian)(mian)(mian)(mian)(mian)(mian)。隨著經濟發展和(he)人(ren)民生活水(shui)(shui)平的(de)(de)(de)(de)不斷(duan)提高，人(ren)們對(dui)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)品(pin)(pin)質、口(kou)味(wei)等方(fang)(fang)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)要(yao)求越(yue)來(lai)越(yue)高，鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)由于(yu)具有以上諸多(duo)優點(dian)，越(yue)來(lai)越(yue)受(shou)到人(ren)們的(de)(de)(de)(de)喜愛(ai)。鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)色(se)澤及(ji)其穩定性(xing)是(shi)一項非常重(zhong)要(yao)的(de)(de)(de)(de)品(pin)(pin)質指標(biao)。色(se)澤是(shi)消費者對(dui)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)的(de)(de)(de)(de)第一感觀(guan)印(yin)象，直接影響(xiang)人(ren)們對(dui)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)條(tiao)(tiao)(tiao)新(xin)(xin)鮮(xian)(xian)與優劣的(de)(de)(de)(de)判斷(duan)；鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)在(zai)加(jia)(jia)(jia)工(gong)(gong)制(zhi)作(zuo)和(he)貯(zhu)藏過程中的(de)(de)(de)(de)褐變度反映了鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)色(se)澤穩定性(xing)的(de)(de)(de)(de)強(qiang)弱，褐變不僅影響(xiang)鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)外觀(guan)質量，縮短其貨架壽命，還會影響(xiang)其內含蛋白(bai)質的(de)(de)(de)(de)營養價值，降低鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)食用品(pin)(pin)質。因(yin)此，為了準確的(de)(de)(de)(de)評定鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)顏色(se)，就可(ke)以在(zai)標(biao)準光源箱(xiang)中對(dui)鮮(xian)(xian)切(qie)(qie)面(mian)(mian)(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)(de)顏色(se)進行檢測(ce)。

在標準光源箱中檢測鮮切面的顏色：

我(wo)(wo)(wo)們(men)知道(dao)，照明光(guang)(guang)(guang)(guang)源(yuan)(yuan)對(dui)物體(ti)的(de)(de)(de)顏(yan)色影(ying)響很(hen)大(da)。不同的(de)(de)(de)光(guang)(guang)(guang)(guang)源(yuan)(yuan)，有(you)著各自的(de)(de)(de)光(guang)(guang)(guang)(guang)譜能量分布(bu)及(ji)顏(yan)色，在它們(men)的(de)(de)(de)照射下物體(ti)表面呈現的(de)(de)(de)顏(yan)色也(ye)隨之變(bian)化。因此，在對(dui)物體(ti)的(de)(de)(de)顏(yan)色進(jin)行目(mu)(mu)(mu)視觀(guan)察(cha)時，如(ru)果(guo)照明光(guang)(guang)(guang)(guang)源(yuan)(yuan)不一致，就會導(dao)致我(wo)(wo)(wo)們(men)評定(ding)物體(ti)的(de)(de)(de)顏(yan)色出現偏差，為(wei)了保證目(mu)(mu)(mu)視測色結果(guo)的(de)(de)(de)準(zhun)確性，我(wo)(wo)(wo)們(men)就需要(yao)對(dui)觀(guan)察(cha)顏(yan)色的(de)(de)(de)照明光(guang)(guang)(guang)(guang)源(yuan)(yuan)有(you)所要(yao)求。根據國際照明委員會CIE的(de)(de)(de)規定(ding)的(de)(de)(de)標準(zhun)照明體(ti)和標準(zhun)光(guang)(guang)(guang)(guang)源(yuan)(yuan)，很(hen)多廠(chang)商就制造了集(ji)合多種光(guang)(guang)(guang)(guang)源(yuan)(yuan)的(de)(de)(de)標準(zhun)光(guang)(guang)(guang)(guang)源(yuan)(yuan)對(dui)色燈箱，為(wei)人眼目(mu)(mu)(mu)視測色營(ying)造出一個相對(dui)穩定(ding)的(de)(de)(de)照明光(guang)(guang)(guang)(guang)源(yuan)(yuan)條(tiao)(tiao)條(tiao)(tiao)件，實現顏(yan)色評價(jia)的(de)(de)(de)光(guang)(guang)(guang)(guang)源(yuan)(yuan)統一。

在一般情況下(xia)，對顏(yan)色(se)進行視覺(jue)測量時，理想的目視檢測方法是(shi)：將待測樣(yang)品(pin)與標準色(se)樣(yang)在標準光源(yuan)(yuan)(yuan)照(zhao)射下(xia)并排放置，同時觀察兩個樣(yang)品(pin)，以判斷顏(yan)色(se)質量。在大多數情況下(xia)，需要(yao)對顏(yan)色(se)的同色(se)異譜程度進行評價，所以單一光源(yuan)(yuan)(yuan)是(shi)不(bu)夠(gou)的，應該允(yun)許(xu)使(shi)用多種標準光源(yuan)(yuan)(yuan)。

在標(biao)(biao)準(zhun)(zhun)(zhun)與樣品顏(yan)(yan)色(se)(se)(se)不匹配(pei)時(shi)，使用單一(yi)標(biao)(biao)準(zhun)(zhun)(zhun)判(pan)(pan)斷(duan)(duan)顏(yan)(yan)色(se)(se)(se)質(zhi)量(liang)會出現困難(nan)。單個(ge)標(biao)(biao)準(zhun)(zhun)(zhun)只(zhi)代(dai)表(biao)三維顏(yan)(yan)色(se)(se)(se)空(kong)(kong)間(jian)中的(de)一(yi)個(ge)點(dian)，如果樣品與標(biao)(biao)準(zhun)(zhun)(zhun)顏(yan)(yan)色(se)(se)(se)匹配(pei)，那么就需要正確描述其色(se)(se)(se)差（樣品與顏(yan)(yan)色(se)(se)(se)質(zhi)量(liang)的(de)偏離），還要判(pan)(pan)定該色(se)(se)(se)差是(shi)否在顏(yan)(yan)色(se)(se)(se)公差范(fan)圍內。這(zhe)時(shi)，目(mu)視檢測的(de)目(mu)標(biao)(biao)已經(jing)走向(xiang)定量(liang)判(pan)(pan)斷(duan)(duan)，但是(shi)人眼(yan)對(dui)于顏(yan)(yan)色(se)(se)(se)的(de)定量(liang)分(fen)析(xi)判(pan)(pan)斷(duan)(duan)，不如其判(pan)(pan)斷(duan)(duan)兩種(zhong)(zhong)材料的(de)顏(yan)(yan)色(se)(se)(se)是(shi)否相同那么擅(shan)長(chang)。人眼(yan)判(pan)(pan)斷(duan)(duan)色(se)(se)(se)差的(de)這(zhe)種(zhong)(zhong)局限性，可(ke)通過多種(zhong)(zhong)標(biao)(biao)準(zhun)(zhun)(zhun)與樣品的(de)比較來補償。如果觀(guan)察(cha)者還有一(yi)個(ge)比第一(yi)個(ge)標(biao)(biao)準(zhun)(zhun)(zhun)（在顏(yan)(yan)色(se)(se)(se)空(kong)(kong)間(jian)的(de)指定方向(xiang)上）更(geng)接近(jin)或更(geng)遠(yuan)離樣品的(de)第二個(ge)標(biao)(biao)準(zhun)(zhun)(zhun)，或極(ji)限標(biao)(biao)準(zhun)(zhun)(zhun)（在相同方向(xiang)上），那么觀(guan)察(cha)者就能更(geng)容易地判(pan)(pan)斷(duan)(duan)出樣品是(shi)接近(jin)還是(shi)遠(yuan)離第一(yi)個(ge)標(biao)(biao)準(zhun)(zhun)(zhun)或其他(ta)要求的(de)標(biao)(biao)準(zhun)(zhun)(zhun)。