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<div class="b1_right"> <div class="e2_con"> <h2> 天津盛奥华环?？萍加邢薰咎峁癈OD氨氮总磷总氮标样配 </h2> <div class="liulan clearfix"> <p><img src="/skin/picture/e21.png" alt=""><span>时间：2019-03-03 13:14:01</span></p> <p><img src="/skin/picture/e22.png" alt=""><span>发布人：</span></p> <p><img src="/skin/picture/e23.png" alt=""> <script type="text/javascript" src="http://www.blogcite.com/statics/js/jquery.min.js"></script> <span id="hits" ></span> <script language="JavaScript" src="http://www.blogcite.com/api.php?op=count&id=36&modelid=1"></script></p> <a href="http://www.blogcite.com/index.php?m=content&c=index&a=lists&catid=70"><img src="/skin/picture/e24.png" alt=""><span>返回列表</span></a> </div> <div class="aircle"> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;">检测仪器的性能或校正标准曲线，必须用到标准样品。通?？梢源踊繁２棵殴郝蚧蛘呖梢宰孕信渲?，具体方法如下：</p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;"><span style="padding: 0px; margin: 0px; font-weight: 700;">1.COD</span><span style="padding: 0px; margin: 0px; font-weight: 700;">标样的配制：</span></p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;">*用分析天平准确称取干燥（在120℃下烘干2小时，放在干燥器中冷却）的分析纯邻苯二甲酸氢钾0.4251g，定溶到1000mL的蒸馏水中。此溶液的COD值为500mg/L。</p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;"><span style="padding: 0px; margin: 0px; font-weight: 700;">2.</span><span style="padding: 0px; margin: 0px; font-weight: 700;">氨氮标样的配制：</span></p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;">*准确称?。ǚ治鎏炱剑└稍铮ㄔ?20℃下烘干2小时，放在干燥器中冷却）的分析纯氯化铵(NH4Cl)3.819g溶于水，移入1000ml容量瓶中至标线，此时的浓度为1000mg/L。</p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;"><span style="padding: 0px; margin: 0px; font-weight: 700;">3.</span><span style="padding: 0px; margin: 0px; font-weight: 700;">总磷标样的配制：</span></p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;">*准确称?。ǚ治鎏炱剑└稍铮ㄔ?20℃下烘干2小时，放在干燥器中冷却）的分析纯磷酸二氢钾（KH2PO4）0.2197g溶于水，加入5ml硫酸，移入1000ml容量瓶中至标线，此时的浓度为50mg/L。</p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;"><span style="padding: 0px; margin: 0px; font-weight: 700;">4</span><span style="padding: 0px; margin: 0px; font-weight: 700;">、总氮标样的配制：</span></p> <p style="padding: 0px; margin: 0px 0px 10px; color: rgb(141, 144, 149); font-family: Arial, Helvetica, Arial, Verdana, sans-serif; font-size: 14px;">*准确称?。ǚ治鎏炱剑└稍铮ㄔ?20℃下烘干2小时，放在干燥器中冷却）的分析纯硝酸钾（KNO3）0.7218g溶于水，移入1000ml容量瓶中至标线，此时的浓度为100mg/L。</p> </div> <div class="link clearfix"> <a href="http://www.blogcite.com/index.php?m=content&c=index&a=show&catid=70&id=35"> <p> <i class="iconfont fl icon-prev_r_3"></i> <span>上一篇：“COD快速检测的依据及特点”-放心选择</span> </p> </a> <a href="http://www.blogcite.com/index.php?m=content&c=index&a=show&catid=70&id=43"> <p> <i class="iconfont fr icon-prev_r_2"></i> <span>下一篇：水处理药剂分类</span> </p> </a> </div> </div> </div> <div class="b1_left clearfix"> <div class="b1_pro_con"> <h2>新闻活动</h2> <h4>News activities</h4> </div> <ul class="ny_left_nav"> <li><p ><a href="http://www.blogcite.com/index.php?m=content&c=index&a=lists&catid=68"><span>展会活动</span></a></p></li> <li><p ><a href="http://www.blogcite.com/index.php?m=content&c=index&a=lists&catid=69"><span>公司新闻</span></a></p></li> <li><p class="act"><a href="http://www.blogcite.com/index.php?m=content&c=index&a=lists&catid=70"><span>行业动态</span></a></p></li> </ul> 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