更新時(shi)間:2023-04-26
冠亞牌GYW-1系列面(mian)包餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)水(shui)(shui)分活度(du)測(ce)定儀檢定原理廣泛應用(yong)于(yu)月(yue)(yue)餅(bing)(bing)(bing)餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、桂花月(yue)(yue)餅(bing)(bing)(bing)餡(xian)(xian)(xian)(xian)、梅干月(yue)(yue)餅(bing)(bing)(bing)餡(xian)(xian)(xian)(xian)、五仁餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、豆沙(sha)餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、玫瑰餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、蓮蓉(rong)餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、冰糖餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、白果餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、肉(rou)松餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、黑芝(zhi)麻餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、火(huo)腿月(yue)(yue)餅(bing)(bing)(bing)餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)、棗泥餡(xian)(xian)(xian)(xian)料(liao)(liao)(liao)(liao)等及月(yue)(yue)餅(bing)(bing)(bing)、蛋(dan)黃月(yue)(yue)餅(bing)(bing)(bing)、冰皮月(yue)(yue)餅(bing)(bing)(bing)京式(shi)月(yue)(yue)餅(bing)(bing)(bing)、廣式(shi)月(yue)(yue)餅(bing)(bing)(bing)、滇式(shi)月(yue)(yue)餅(bing)(bing)(bing)、潮式(shi)月(yue)(yue)餅(bing)(bing)(bing)、蘇式(shi)月(yue)(yue)餅(bing)(bing)(bing)、臺(tai)式(shi)月(yue)(yue)餅(bing)(bing)(bing)、港式(shi)月(yue)(yue)餅(bing)(bing)(bing)、徽式(shi)月(yue)(yue)餅(bing)(bing)(bing)、衢(qu)式(shi)月(yue)(yue)餅(bing)(bing)(bing)、秦(qin)式(shi)月(yue)(yue)餅(bing)(bing)(bing)、晉式(shi)月(yue)(yue)餅(bing)(bing)(bing)等水(shui)(shui)分活度(du)快速測(ce)試。
面包餡料水分活度測定儀檢定原理
冠亞牌GYW-1系列面包餡料水分活度測定儀檢定原理是一種常用的檢測儀器,在多個行業中都有一定的應用。水分活度儀可以應用于反應食品平衡狀態下的有效水分、穩定性和生物繁殖的可能性,還可以衡量微生物忍受干燥程度的能力。水分活度主要反應食品平衡狀態下的自由水分的多少,反應食品的穩定性和微生物繁殖的可能性,以及能引起食品品質變化的化學、酶及物理變化的情況,常用于衡量微生物忍受干燥程度的能力。通過測量食品的水分活度,選擇合理的包裝和儲藏方法,可以減少防腐劑的使用,可以判斷食品、糧食、果蔬的貨架壽命。冠亞GYW系列水分活度儀是把被測樣品置于密封的空間內,在保持恒溫的條件下,使樣品與周圍空氣的蒸汽壓達到平衡,這時就可以以氣體空間的水蒸汽壓作為樣品蒸汽壓的數值。同時,在一定溫度下純水的飽和蒸汽壓是一定的,所以可以應用上述水分活度定義的公式,計算出被測食品的水分活度。
食品水(shui)分活度介紹
食(shi)品中(zhong)(zhong)的(de)水(shui)(shui)(shui)可分(fen)為(wei)結合水(shui)(shui)(shui)和自(zi)由(you)(you)水(shui)(shui)(shui)兩類(lei),自(zi)由(you)(you)水(shui)(shui)(shui)能被微(wei)生(sheng)物所利(li)用, 結合水(shui)(shui)(shui)則不(bu)能。食(shi)品中(zhong)(zhong)水(shui)(shui)(shui)分(fen)含量(liang),不(bu)能說提出了水(shui)(shui)(shui)分(fen)活(huo)性( 亦稱(cheng)水(shui)(shui)(shui)分(fen)活(huo)度,Water activity) 的(de)概念(nian)。水(shui)(shui)(shui)活(huo)度是吸(xi)濕物質(zhi)在很小的(de)密(mi)閉容器(qi)內與周圍空間達到平衡時的(de)相對(dui)濕度,用aw表示。水(shui)(shui)(shui)活(huo)性測(ce)量(liang)主要用在食(shi)品行業,常用來檢測(ce)產(chan)品的(de)保(bao)質(zhi)期和質(zhi)量(liang)。
食(shi)(shi)品(pin)(pin)的(de)(de)(de)(de)變質(zhi)(zhi)(zhi)與食(shi)(shi)品(pin)(pin)中的(de)(de)(de)(de)水(shui)(shui)分(fen)(fen)含量(liang)有關,雖然變質(zhi)(zhi)(zhi)程度(du)(du)(du)并不與水(shui)(shui)分(fen)(fen)含量(liang)成(cheng)比(bi)例,但水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)的(de)(de)(de)(de)大小更能說明食(shi)(shi)品(pin)(pin)發生(sheng)(sheng)變質(zhi)(zhi)(zhi)的(de)(de)(de)(de)問(wen)題。水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)決定(ding)了各種微(wei)生(sheng)(sheng)物(wu)在食(shi)(shi)品(pin)(pin)中萌(meng)發的(de)(de)(de)(de)時間、生(sheng)(sheng)長速(su)率和死亡(wang)率。水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)越大,食(shi)(shi)品(pin)(pin)內自由(you)水(shui)(shui)含量(liang)越多(duo),越易受微(wei)生(sheng)(sheng)物(wu)感染;而食(shi)(shi)品(pin)(pin)中水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)越小,食(shi)(shi)品(pin)(pin)越穩(wen)定(ding),較少出(chu)現(xian)變質(zhi)(zhi)(zhi)的(de)(de)(de)(de)問(wen)題。因此,水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)成(cheng)為一個指(zhi)示產品(pin)(pin)穩(wen)定(ding)性(xing)和微(wei)生(sheng)(sheng)物(wu)安全的(de)(de)(de)(de)重要(yao)參(can)數。另外,由(you)于各種微(wei)生(sheng)(sheng)物(wu)的(de)(de)(de)(de)生(sheng)(sheng)命活(huo)(huo)(huo)動以(yi)及各種化(hua)(hua)學、生(sheng)(sheng)物(wu)化(hua)(hua)學變化(hua)(hua)都需(xu)要(yao)一定(ding)的(de)(de)(de)(de)水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)值,所以(yi)水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)值對食(shi)(shi)品(pin)(pin)保存(cun)具有重要(yao)的(de)(de)(de)(de)意義。水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)、水(shui)(shui)活(huo)(huo)(huo)性(xing)、水(shui)(shui)活(huo)(huo)(huo)度(du)(du)(du)均屬于同一概念。目前(qian)市場上受歡迎(ying)的(de)(de)(de)(de)水(shui)(shui)分(fen)(fen)活(huo)(huo)(huo)度(du)(du)(du)儀冠亞牌GYW-1,操作(zuo)簡(jian)單(dan),廣泛(fan)應用于食(shi)(shi)品(pin)(pin)企業、院校(xiao)、科(ke)研單(dan)位等。
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