氨氮测定�?参数-价格-中国粉体罐�/title>

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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><strong></strong></p><p><strong>1</strong><strong>、简今�/strong></p><p>氨氮（NH3-N）以游离氨（NH3）或铵盐（NH4+）形式存在于水中，两者的组成比取决于水的PH值和水温。当PH值偏高时，游离氨的比例高。反之，则铵盐的比例高，水温则相反。水中氨氮的来源主要为生活污水中含氮有机物受微生物作用的分解产物，某些工业废水，如焦化废水和合成氨化肥厂废水等，以及农田排水。此外，在无氧环境中，水中存在的亚硝酸盐亦可受微生物作用，还原为氨。在有氧环境中，水中氨亦可转变为亚硝酸盐，甚至继续转变为硝酸盐。测定水中各种形态的氮化合物，有助于评价水体被污染和"自净"状况。鱼类对水中氨氮比较敏感，当氨氮含量高时会导致鱼类死亡、�/p><p>仪器采用纳氏比色法测量水中的氨氮，该方法具有操作简便、灵敏度高等特点。该仪器广泛适用于环境监测、污水处理及大专院校、科研单位等部门、�/p><p><strong>2</strong><strong>、特炸�/strong></p><p>1) 测定仪为冷光源、窄带干涉光学系统，光学稳定性好、�/p><p>2) 可各保存标准曲线10条及99个测定值，断电不丢失、�/p><p>3) LCD大屏液晶显示，操作方便直观、�/p><p>4) 具有打印功能：可对测试的记录立即打印或查询记录打印、�/p><p>5) USB接口，可连接电脑、�/p><p><strong>3</strong><strong>、技术指栆�/strong></p><p>1) 测量范围：（0�?）mg/L、（5�?5）mg/L。（超量程可稀释后测定（�/p><p>2) 示值误差：�?#177;3%F.S</p><p>3) 重复� ：≤3%</p><p>4) 光学稳定性：仪器吸光值在20min内漂移小�?.002A</p><p>5) 外形尺寸９�span>400x310x158mm</span></p><p>6) 重量�?kg </p><p>7) 功耗：<30W</p><p>8) 正常使用条件９�/p><p>a) 环境温度:5�?0� </p><p>b) 相对湿度: �?5%</p><p>c) 供电电源: <span>AC220V(165V-240V)</span></p><p>d) 无显著的振动及电磁干扰，避免阳光直射、�/p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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