东西分析PTR-QMS3500型质子转移反应质�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><strong><span>仪器简介：</span></strong></p><p><span>质子转移反应质谱＇�/span>PTR-MS）是通过待测组份与试剂离子在特定的条件下发生质子转移反应而成为质子化的带电粒子，进入后一级的质量分析器被分离检测。该仪器主要用于是测量、监测、挥发性有机化合物（VOCs）的超灵敏检测，可以满足实时在线连续监测、连续定量测量挥发性有机化合物，理论上只要质子亲和力大亍�/span><span>691(kJ mol</span><span>-1</span><span>)</span><span>的化合物都可以发生质子转移反应被检测。基本上常见的大气环境中的有机污染物。比如苯系物、大部分烷烃、烯烃、醚类、脂类都可以被检测、�/span></p><p><span>质子转移反应质谱（PTR-MS）主要特点是采用了基于PTR原理的装置叫做为离子源。PTR源是基于一种软离子化技术，产生的主要离子是(M+H)</span><sup><span>+</span></sup><span>离子，几乎不产生碎片离子，因此可以获得更高的检测灵敏度，使用水合氢离子（H</span><sub><span>3</span></sub><span>O</span><sup><span>+</span></sup><span>）作为试剂离子时，几乎绝大多数挥发性有机物分子都可被电离，而常空气主要成分如N<sub>2</sub> ，O<sub> 2</sub> ，Ar，CO <sub>2</sub> 等物质，由于其质子亲和力都比水低，因此不能从H</span><sub><span>3</span></sub><span>O</span><sup><span>+</span></sup><sub><span>三�/span></sub><span>获取质子被离子化，所以空气背景对检测没有干扰。正是因为这一优势，PTR-MS在监测VOCs</span><span>方面具有很大的优势，*低检测限可以达到几个pptv，而且被测气体可以直接导入反应室而不需任何前处理设备。极大简化了分析步逐，提高了检测效率，*重要的是可以实时在线监测空气中危害有机物含量随时间的变化，便于科学家和检测部门及时掌握污染物情况并采取相应措施、�/span></p><p><strong><span>技术参数：</span></strong><span>质量范围９�/span>1.5-600amu </span><span>刅�/span><span>�?/span><span>率：单位质量分辨</span><span>响应时间９�/span>100ms </span></p><p><span>检测限９�/span><span> 100</span><span> pptv （苯（�/span><span>线性范围：</span><span>50</span><span>pptv � 10ppmv </span><span>可调流速：</span>80�?00sccm </span></p><p><span>进样系统（可根据不同的要求定制）９�/span>1.0m长带有保温加热系统的惰性化毛细箠�/span><span>进样系统加热范围９�/span>150� </span><span>反应室加热范围：</span>40�?50� </span></p><p><span>电源９�/span> 2</span><span>2</span><span>0 V</span></p><p><span>尺寸（宽</span> x � x 深）� </span><span>48</span><span> x </span><span>54.5</span><span>x </span><span>63</span><span> cm</span><span>重量：约</span><span> 100</span><span> Kg</span></p><p><span>初级离子束：</span>H<sub>3</sub>O<sup>+</sup></span><span>其它</span><span>可逈�/span><span>初级离子：可更换其它进样气体作为</span><span>反应试剂</span><span>，产生不同的试剂离子</span><span>，包�?/span>NH</span><sub><span>4</span></sub><sup><span>+</span></sup><span>，O</span><sub><span>2</span></sub><sup><span>+</span></sup><span>，NO</span><sup><span>+</span></sup><span>等、�/span></p><p><strong><span>主要特点９�/span></strong></p><p><span>l </span><span>低气压微辉光放电离子源，电子密度大，效率高，抗污染易维护：�/span></p><p><span>l </span><span>高质量四极杆质谱系统，确保数据稳定可靠；</span></p><p><span>l </span><span>*低检测限可达到几十个</span>pptv：�/span></p><p><span>l </span><span>快速在线实时分枏�/span>VOCs</span><span>：�/span></p><p><span>l </span><span>高效软电离技术，试剂离子纯度可达�?/span>99.8以上：�/span></p><p><span>l </span><span>快速简单分析样品，无需样品浓缩处理：�/span></p><p><span>l </span><span>选择定质量监测和全范围扫描监测两种方式；</span></p><p><span>l </span><span>全参数自动调谐程序，快速优化仪器参数；</span></p><p><span>l </span><span>快速真空阀切换，无需停机即可更换反应试剂：�/span></p><p><span>l </span><span>多功能嵌入式控制系统安全可靠：�/span></p><p><span>l </span><span>满足</span>4�?0ma、MODBUS协议远程数据传输：�/span></p><p><span>l </span><span>结构紧凑，安装可靠可用于车载化安装，便于野外监测：�/span></p><p><strong><span>应用领域９�/span></strong></p><p><span>主要应用于，大气环境�?/span>VOCs </span><span>的痕量检浊�/span><span>，包括生物质挥发有机物、人类活动产生的挥发性有机物，比妁�/span><span>城市道路机动车尾气监测，不同低于、不同季节空气质量差异性分析；食品风味物质的监测和感官评鉴，比如咖啡、茶的风味成分分析；</span><span>医学领域方面对人体呼出气体的病原性研究，比如吸烟人群、癌症患者的呼出气体的标志物监测分析；公共安全领域的爆炸物分析监测，比如</span>TNT及麻醉品的痕量快速监测；军事科学领域的化学战剂及有毒化学品监测� </span></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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