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id="t3n2mwg" class="twoCol"><div id="tfkmo3j" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/second-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/third-huagong_qtfltz/">其他未分類</a>?嘉興乙基VC 醚造價(jià) 創(chuàng)造輝煌上海北倉化工科技供應(yīng)</p><div id="zt48ik4" class="leftbox clearfix"><h1>嘉興乙基VC 醚造價(jià) 創(chuàng)造輝煌上海北倉化工科技供應(yīng)</h1><div id="832ri3e" class="proBig"><div id="poievs9" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326789029082031/3899444.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7ek7vhg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326789029082031/3899444.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="gfeqip4" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>嘉興乙基VC 醚造價(jià),維生素C乙基醚</p><p><span>***更新：</span>2020-12-28 03:13:43</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="7ja8v3g" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海北倉化工科技有限公司</a></p><p><span>聯(lián)系人：</span>王金良</p><p><span>郵箱: </span>shbeicang@vip.126.com</p><p><span>電話: </span>18516286991</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.shbeicang.cn</p><p><span>手機(jī): </span>021-60459206</p><p><span>地址: </span>金山大道4168號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="0h3bi3t" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xwi87ev" class="box"><p><p style="text-indent:25px">維生素C乙基醚溶液顏色檢查目視比色法：即將供試品溶液與各色調(diào)標(biāo)準(zhǔn)比色液進(jìn)行比較，以判斷結(jié)果。儀器與用具：納氏比色管用具有10ml 刻度標(biāo)線的25ml 納氏比色管或**管，要求玻璃質(zhì)量較好，管壁薄厚、管徑、色澤、刻度標(biāo)線一致。白色背景要求不反光，一般用白紙或白布。試藥與試液：重鉻酸鉀用基準(zhǔn)試劑，硫酸銅及氯化鈷均為分析純?cè)噭?。比色用重鉻酸鉀液精密稱取在120℃ 干燥至恒重的基準(zhǔn)重鉻酸鉀0.4000g ，置500ml 量瓶中，嘉興乙基VC 醚造價(jià)，加適量水溶解并稀釋至刻度，嘉興乙基VC 醚造價(jià)，搖勻，即得。每1ml 溶液中含0，嘉興乙基VC 醚造價(jià).800mg的重鉻酸鉀。維生素C乙基醚很容易通過角質(zhì)層進(jìn)去皮革層。嘉興乙基VC 醚造價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉興乙基VC 醚造價(jià),維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326789029082031/3899444.png"></div><p style="text-indent:25px">眾所周知，維生素C是一種強(qiáng)烈的還原劑，它具有抗氧化的作用，淡化黑色素的顏色，是非常受寵的美白但維生素C也有著其很難克服的缺點(diǎn)，既怕光，又怕熱，更怕氧化，一旦接觸氧氣，還原力會(huì)全部喪失，而且不易被皮膚真正吸收，皮膚利用度低。相對(duì)維C而言，VC乙基醚作為維生素C的衍生物，它保留了維生素C的氧化還原作用而且非常穩(wěn)定，是不變色的維生物C衍生物，很容易穿透角質(zhì)層進(jìn)入皮革層，進(jìn)入皮膚后被生物酶分解發(fā)揮VC的作用，提高VC的利用度，從而起到更好的淡斑美白功效,是全世界安全美白產(chǎn)品的新寵。嘉興乙基VC 醚造價(jià)維生素C乙基醚儲(chǔ)存條件：0-10℃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉興乙基VC 醚造價(jià),維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788596728515/9282784.png"></div><p style="text-indent:25px">白天在護(hù)膚時(shí)使用維生素C乙基醚產(chǎn)品反而能增加皮膚對(duì)紫外線的耐受程度，也就是加強(qiáng)防曬力度（但后續(xù)還是要涂防曬產(chǎn)品的哦），而且告訴你們維生素C乙基醚這種成分的好處真的太多了，比如美白、淡化色斑、***、抗氧化、**老......所以如果你想白的話放心大膽的用維生素C乙基醚類護(hù)膚品。既然維生素C乙基醚已經(jīng)被證實(shí)在美白肌膚方面確實(shí)是有效的，但是千萬不要認(rèn)為用了維生素C乙基醚產(chǎn)品你就能白成一道光。剛曬傷、曬黑、或者剛長出淺層曬斑的時(shí)候，馬上使用維生素C乙基醚類產(chǎn)品是比較有效的，因?yàn)閯倓傂纬傻纳剡€沉淀在肌膚表層，維生素C乙基醚可以通過把多巴醌還原成多巴來減少黑色素的沉積實(shí)現(xiàn)美白功效。</p><p style="text-indent:25px">VC主要負(fù)責(zé)對(duì)抗水性自由基，是個(gè)不穩(wěn)定的淘氣寶寶，很不穩(wěn)定。護(hù)膚品中，一般都是它的衍生物維生素C乙基醚等。研究證明，護(hù)膚品中所添加的VC只有達(dá)到0.5%~2.0%的濃度才能真正起到美白功效，該濃度的維生素C乙基醚則能幫助緊致肌膚。所謂的緊致是它可以參與進(jìn)膠原蛋白合成的過程中，增加肌膚中膠原蛋白的數(shù)量并促進(jìn)膠原蛋白的連接。有實(shí)驗(yàn)顯示，持續(xù)使用6個(gè)月維生素C乙基醚護(hù)膚，肌膚紋理的排列方向發(fā)生了變化：從方向較為一致變?yōu)榉较螂s亂的網(wǎng)狀結(jié)構(gòu)，正是老化肌和年輕肌的特點(diǎn)。維生素C乙基醚溶液色度可以通過色差計(jì)直接測出溶液的色度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉興乙基VC 醚造價(jià),維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326789055488281/5916318.png"></div><p style="text-indent:25px">維生素C乙基醚溶液測試色度的色差計(jì)注意事項(xiàng)：測定池應(yīng)潔凈透明，可用洗液浸泡清洗。水的三刺激值為X=94.81、Y=100.00、Z=107.32。如測定后水的三刺激值中任一值與標(biāo)準(zhǔn)值的偏差大于1.5 ，則應(yīng)重新校準(zhǔn)儀器。供試品溶液配制后需立即測定，如溶液中含有氣泡，可短時(shí)超聲去除后再行測定。本法只適用于測定澄清溶液的顏色，如供試品溶液渾濁，則影響顏色測定的結(jié)果。如品種項(xiàng)下規(guī)定的標(biāo)準(zhǔn)比色液的色調(diào)有兩種（或兩種以上），但目視可判定供試液的色調(diào)與其中一種相同或接近，則可直接與該色調(diào)標(biāo)準(zhǔn)比色液的色差值（ΔE*）進(jìn)行比較判斷；如供試液的色調(diào)處于二者之間，目視難于判定更接近何種標(biāo)準(zhǔn)比色液的色調(diào)時(shí)，則應(yīng)將測得的供試品溶液與水的色差值（ΔE*）與兩種色調(diào)標(biāo)準(zhǔn)比色液與水的色差值的平均值［（ΔΕ*s1+ΔΕ*s2 ）/2 ］進(jìn)行比較來判定。維生素C乙基醚可以調(diào)節(jié)和變亮被陽光破壞和看起來灰暗的帶黑斑的皮膚。嘉興乙基VC 醚造價(jià)</p><p style="text-indent:25px">維生素C乙基醚的活性的水平和維生素C酯化磷酸鹽相似。嘉興乙基VC 醚造價(jià)</p><p style="text-indent:25px">維生素C乙基醚通過透過角質(zhì)層直達(dá)基底層黑色素細(xì)胞，阻礙酪氨酸酶活性，阻礙***，還原黑色素為無色，從而高效美白肌膚。并且VC乙基醚能夠進(jìn)入皮革層后直接參與膠原蛋白的合成修復(fù)皮膚細(xì)胞活性，使膠原蛋白增加，從而使皮膚變得充盈富有彈性，使肌膚細(xì)膩光滑。應(yīng)用3-O-乙基抗壞血酸醚(維生素C乙基醚)是油水兩溶的物質(zhì)，這使得配方師可以任將其加入油相或水相，亦可以在高溫或低溫時(shí)加入，從而方便使用，更重要的一點(diǎn)是，這種兩溶性使其更容易穿透角質(zhì)層并進(jìn)入皮革層從而發(fā)揮其生物學(xué)功效，而這是其它維生素C衍生物所不具備的。它可通過阻礙酪氨酸酶的活性，阻斷黑色素形成；具有美白和淡斑作用(2％添加時(shí))。嘉興乙基VC 醚造價(jià)</p></p><br /><p>文章來源地址: 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