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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="stsew7d" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991236161257/4858141.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yc972tl" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>元素原子吸收分光光度計排行,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-05 08:11:44</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="gk4gnt8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海儀電分析儀器有限公司</a></p><p><span>聯(lián)系人：</span>薛馬駿</p><p><span>郵箱: </span>ydfxwx@qq.com</p><p><span>電話: </span>18001994173</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.inesa-a.com</p><p><span>手機(jī): </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</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="3x8ogd9" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="o8df3b3" class="box"><p><p style="text-indent:25px">原子吸收分析中，首先要使待測元素呈原子狀態(tài)，而原子化往往是將溶液噴霧到火焰中去實(shí)現(xiàn)，這就存在理化方面的干擾，使對難溶元素的測定靈敏度還不夠理想，因此實(shí)際效果理想的元素*30余個；由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等，操作中必須注意安全。原子吸收分光光度計一般由四大部分組成，即光源（單色銳線輻射源）、試樣原子化器、單色儀和數(shù)據(jù)處理系統(tǒng)（包括光電轉(zhuǎn)換器及相應(yīng)的檢測裝置）。原子化器主要有兩大類，即原子吸收分光光度計和電熱原子化器，元素原子吸收分光光度計排行。火焰有多種火焰，元素原子吸收分光光度計排行，元素原子吸收分光光度計排行，目前普遍應(yīng)用的是空氣—乙炔火焰。原子吸收分光光度計，利用空氣—乙炔測定的元素可達(dá)30多種。元素原子吸收分光光度計排行</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素原子吸收分光光度計排行,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991236161257/4858141.png"></div><p style="text-indent:25px">原子吸收在食品分析中越來越多。食品和飲料中的20多種元素已有滿意的原子吸收分析方法。生化和臨床樣品中必需元素和有害元素的分析現(xiàn)已采用原子吸收法。有關(guān)石油產(chǎn)品、陶瓷、農(nóng)業(yè)樣品、藥物和涂料中金屬元素的原子吸收分析的文獻(xiàn)報道近些年來越來越多。水體和大氣等環(huán)境樣品的微量金屬元素分析已成為原子吸收分析的重要領(lǐng)域之一。利用間接原子吸收法尚可測定某些非金屬元素。有機(jī)物分析中的應(yīng)用：利用間接法可以測定多種有機(jī)物。8-羥基喹啉(Cu)、醇類(Cr)、醛類(Ag)、酯類(Fe)、酚類(Fe)、聯(lián)乙酰(Ni)、酞酸(Cu)、脂肪胺(co)、氨基酸(Cu)、維生素C(Ni)、氨茴酸(Co)、雷米封(Cu)、甲酸奎寧(Zn)、有機(jī)酸酐(Fe)、苯甲基青霉素(Cu)、葡萄糖(Ca)、環(huán)氧化物水解酶(PbO、含鹵素的有機(jī)化合物(Ag)等多種有機(jī)物，均通過與相應(yīng)的金屬元素之間的化學(xué)計量反應(yīng)而間接測定。專業(yè)原子吸收分光光度計設(shè)備在一定濃度范圍內(nèi)，原子吸收分光光度計吸收強(qiáng)度與試液中被測元素的含量成正比。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素原子吸收分光光度計排行,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">原子吸收分光光度計剖析是現(xiàn)在很靈敏的方法之一?；鹧嬖游盏南鄬`敏度為ug/ml-ng/ml，無火焰原子吸收分光光度計的肯定靈敏度在10-10-10-14之間。如果采取預(yù)富集，可進(jìn)一步進(jìn)步剖析靈敏度。因?yàn)樵摲椒ǖ撵`敏度高，使剖析手續(xù)簡化可直接測定，則縮短剖析周期加快丈量進(jìn)程。因?yàn)殪`敏度高，則需樣量少。微量進(jìn)樣熱核的引進(jìn)，可使火趣味的需樣量少至20-300ul。無火焰原子吸收分光光度計剖析的需樣量*5–100ul。固體直接進(jìn)樣石墨爐原子吸收法*需0.005-30mg，這關(guān)于實(shí)驗(yàn)來歷困難的剖析是很為有利的。</p><p style="text-indent:25px">原子吸收分光光度計使用的首要限制是：該法只能進(jìn)行無機(jī)元素的含量剖析，不能直接用于有機(jī)化合物的含量剖析和結(jié)構(gòu)剖析;別的，慣例原子吸收分光光度計每測一種元素，要替換一次空心陰極燈光源，不能同時進(jìn)行多元素剖析。所用儀器為原子吸收分光光度計，它由光源、原子化器、單色器、背景校正系統(tǒng)、自動進(jìn)樣系統(tǒng)和檢測系統(tǒng)等組成。原子吸收分光光度計通常人體所需的常量或痕量元素以必定的濃度散布在人的體液和各種中，在人的生活動中起著不可或缺的作用，其主要生理功能是構(gòu)成人體的組成部分，也是酶和維生素的組成部分。原子吸收光譜分析工作原理：利用待測元素的共振輻射。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="元素原子吸收分光光度計排行,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png"></div><p style="text-indent:25px">原子吸收分光光度計內(nèi)標(biāo)法是在試樣各含量不同的一系列規(guī)范試樣中，分別參加固定量的純物質(zhì)，即內(nèi)標(biāo)物。在規(guī)范條件下測定剖析元素和內(nèi)標(biāo)元素的吸光度比，以此比值對濃度作圖，制作規(guī)范曲線，在同樣條件下，測定試樣中被測元素和內(nèi)標(biāo)元素的吸光度比值，在從規(guī)范曲線上讀取對應(yīng)的濃度。長處：可以減少試驗(yàn)條件按變化引起的隨機(jī)誤差，進(jìn)步精細(xì)度。缺乏：需要使用雙通道原子吸收光譜儀，使用上受到限制。剖析速度快，可多元素和常量、微量元素一起進(jìn)行剖析。一般的發(fā)射光譜剖析法不適用于測定樣品中含量高的元素，假如通過辦法研究滿意了準(zhǔn)確測定高含量元素的要求，則常不能滿意微量元素的需要。采用電感耦合等離子體發(fā)射光譜剖析辦法成功地處理了這類問題?；鹧嬖踊ǖ膬?yōu)點(diǎn)是：火焰原子化法的操作簡便，重現(xiàn)性好，有效光程大。手持原子吸收分光光度計廠家</p><p style="text-indent:25px">石墨爐原子吸收分光光度計，可以測定近50種元素。元素原子吸收分光光度計排行</p><p style="text-indent:25px">原子吸收分光光度計程序升溫的條件選擇：在原子吸收分光光度計中，合理選擇干燥、灰化、原子化及除殘溫度與時間是十分重要的。干燥應(yīng)在稍低于溶劑沸點(diǎn)的溫度下進(jìn)行，以避免試液飛濺?；一囊鈭D是除去基體和局外組分，在保證被測元素沒有丟失的前提下應(yīng)盡或許運(yùn)用較高的灰化溫度。原子化溫度的選擇原則是，選用達(dá)到很大吸收信號的很低溫度作為原子化溫度。原子化時間的選擇，應(yīng)以保證完全原子化為準(zhǔn)。原子化階段停止通維護(hù)氣，以延伸自由原子在石墨爐內(nèi)的平均停留時間。除殘的意圖是為了消除殘留物發(fā)生的記憶效應(yīng)，除殘溫度應(yīng)高于原子化溫度。元素原子吸收分光光度計排行</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，是一家生產(chǎn)型公司。儀電分析致力于為客戶提供良好的分光光度計，氣相色譜，原子吸收，食品安全，一切以用戶需求為中心，深受廣大客戶的歡迎。公司秉持誠信為本的經(jīng)營理念，在儀器儀表深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢，打造儀器儀表良好品牌。儀電分析立足于全國市場，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2713542.html</p></div></div></div></div></div><div id="hw9f8b4" class="page-right twoColRt"><div id="ga9urth" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="y8c8en9" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="uoizbsr" class="recomPic likePro"><a 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