化學(xué)試劑的有效期使用

<p class="MsoNormal"><strong><span style="font-family: 宋體; font-size: 9pt;">化學(xué)試劑的等級(jí)化學(xué)試劑的純度較高，依據(jù)純度及雜質(zhì)含量的多少，可將其分為以下幾個(gè)等級(jí)。</span></strong><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(255, 0, 0);"><strong><span style="font-family: 宋體; font-size: 9pt;"><font face="宋體">（</font>1<font face="宋體">）</font></span></strong></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">優(yōu)級(jí)純?cè)噭?亦稱確保試劑，為一級(jí)品，純度高，雜質(zhì)很少，首要用于精細(xì)剖析和科學(xué)研究，常以</font><font face="Calibri">GR</font><font face="宋體">表明。</font></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(255, 0, 0);"><strong><span style="font-family: 宋體; font-size: 9pt;"><font face="宋體">（</font>2<font face="宋體">）</font></span></strong></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">剖析純?cè)噭?亦稱剖析試劑，為二級(jí)品，純度略低于優(yōu)級(jí)純，雜質(zhì)含量略高于優(yōu)級(jí)純，適用于重要剖析和一般性研究作業(yè)，常以</font><font face="Calibri">AR</font><font face="宋體">表明。</font></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(255, 0, 0);"><strong><span style="font-family: 宋體; font-size: 9pt;"><font face="宋體">（</font>3<font face="宋體">）</font></span></strong></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">化學(xué)純?cè)噭?為三級(jí)品，純度較剖析純差，但高于試驗(yàn)試劑，適用于工廠、校園一般性的剖析作業(yè)，常以</font><font face="Calibri">CP</font><font face="宋體">表明。</font></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(255, 0, 0);"><strong><span style="font-family: 宋體; font-size: 9pt;"><font face="宋體">（</font>4<font face="宋體">）</font></span></strong></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">試驗(yàn)試劑 為四級(jí)品，純度比化學(xué)純差，但比工業(yè)品純度高，首要用于一般化學(xué)試驗(yàn)，不能用于剖析作業(yè)，常以 </font><font face="Calibri">LR</font><font face="宋體">表明。</font></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">以上按試劑純度的分類法已在我國(guó)通用。依據(jù)化學(xué)工業(yè)部公布的</font>&ldquo;化學(xué)試劑包裝及標(biāo)志&rdquo;的規(guī)則，化學(xué)試劑的不同等級(jí)分別用各種不同的色彩來(lái)標(biāo)志。</span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="color: rgb(255, 102, 0);"><strong><span style="font-family: 宋體; font-size: 9pt;">化學(xué)試劑有效期</span></strong></span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;">化學(xué)試劑在儲(chǔ)存、運(yùn)送和出售進(jìn)程中會(huì)遭到溫度、光輻照、空氣和水份等外在要素的影響，容易發(fā)生潮解、霉素、變色、聚合、氧化、蒸發(fā)、提高和分化等物理化學(xué)變化，使其失效而無(wú)法運(yùn)用。</span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;">因此要選用合理的包裝，恰當(dāng)?shù)膬?chǔ)存條件和運(yùn)送方法，確保化學(xué)試劑在儲(chǔ)存、運(yùn)送和出售進(jìn)程中不蛻變。對(duì)一些對(duì)儲(chǔ)存和運(yùn)送有特殊要求的應(yīng)按特殊要求處理。有些化學(xué)試劑有必定的保質(zhì)期，運(yùn)用時(shí)必定要注意。</span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;">化學(xué)試劑的有效期跟著化學(xué)品的化學(xué)性質(zhì)的改動(dòng)，有著很大的差異。</span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;">一般情況下，化學(xué)性質(zhì)安穩(wěn)的物質(zhì)，保存有效期就越長(zhǎng)，保存條件也簡(jiǎn)略。</span><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋體;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><font face="宋體">我國(guó)的常規(guī)的化學(xué)試劑沒(méi)有實(shí)行保質(zhì)期，（部分生化試劑，及臨床確診試劑有些是有保質(zhì)期的）。一般來(lái)說(shuō)，象無(wú)水乙醇，碘等易蒸發(fā)的密閉常溫保存就可以了。無(wú)機(jī)鹽類的注意不要潮解。</font> </span><span style="mso-spacerun:'yes';font-family:Calibri;mso-fareast-font-family:宋體;mso-bidi-font-family:'Times New Roman';font-size:9.0000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span></p>