Voltammetric Determination of Serine Using L‐Cysteine Modified Platinum Electrode and Brief Exploration from the Theoretical Perspective

Xue Bingchun; Fu Yan; Li Jing; Liu Erbao

摘要

Abstract > A new method for the detection of serine was described using L‐cysteine chemically modified electrode, which was prepared by cyclic voltammetry. The factors, such as pH, scan rate, and soaking time for the experimental process were discussed. Under the optimal conditions, the linear range for serine concentration was 3×10 ?7 ～8×10 ?5 ?mol?L ?1 , the detection limit was 2.34×10 ?7 ?mol?L ?1 (S/N=3), and the relative standard deviation was 2.14?% (n=10) for 3×10 ?7 ?mol?L ?1 serine solution. The method was applied to the detection of serine in apple cider vinegar sample with a recovery of 97.5?%–101.9?%. To further discuss the change of the property of platinum surface on atomic level, theoretical calculations were carried out. The change of adsorption energy indicated that the possible interaction of Pt and cysteine was O?C?O bridge adsorption. The analysis about the density of states (DOS) of the system and pseudo band gap showed an increase in the Pt surface activity. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >使用L-半胱氨酸化学改性电极描述了检测丝氨酸的新方法，通过循环伏安法制备。讨论了实验过程的pH，扫描速率和浸泡时间的因素。在最佳条件下，丝氨酸浓度的线性范围为3×10 Δ7</ sup>〜8×10 5 </ sup>ωmolαl ？1 </ sup> ，检测限为2.34×10 Δ7</ sup>ωmolΔ1α1</ sup>（s / n = 3），相对标准偏差为2.14？％（n = 10）对于3×10 ？7 </ sup>？molα1α1</ sup>丝氨酸溶液。将该方法应用于苹果醋样品中丝氨酸的检测，回收率为97.5μm-101.9≤％。进一步讨论铂表面对原子水平的变化，进行了理论计算。吸附能量的变化表明，Pt和半胱氨酸的可能相互作用是O 2α桥梁吸附。关于系统和伪带隙的状态密度（DOS）的密度分析显示PT表面活性的增加。 </ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-22546/'>《Electroanalysis》</a> <b style="margin: 0 2px;">|</b><span>2018年第6期</span><b style="margin: 0 2px;">|</b><span>共6页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Xue Bingchun&option=202" target="_blank" rel="nofollow">Xue Bingchun;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Fu Yan&option=202" target="_blank" rel="nofollow">Fu Yan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Jing&option=202" target="_blank" rel="nofollow">Li Jing;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Erbao&option=202" target="_blank" rel="nofollow">Liu Erbao;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>School of Chemistry and Materials ScienceShanxi Normal UniversityNo.1 Gongyuan Road Linfen 041000 Shanxi Province China;</p> <p>School of Chemistry and Materials ScienceShanxi Normal UniversityNo.1 Gongyuan Road Linfen 041000 Shanxi Province China;</p> <p>School of Chemistry and Materials ScienceShanxi Normal UniversityNo.1 Gongyuan Road Linfen 041000 Shanxi Province China;</p> <p>School of Chemistry and Materials ScienceShanxi Normal UniversityNo.1 Gongyuan Road Linfen 041000 Shanxi Province China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/4817.html" title="电化学、电解、磁化学">电化学、电解、磁化学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Voltammetry&option=203" rel="nofollow">Voltammetry;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=L-cysteine&option=203" rel="nofollow">L-cysteine;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Modified electrode&option=203" rel="nofollow">Modified electrode;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Serine&option=203" rel="nofollow">Serine;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Theoretical calculation&option=203" rel="nofollow">Theoretical calculation;</a> </p> <div class="translation"> 机译：伏安;L-半胱氨酸;改性电极;丝氨酸;理论计算; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704023174424.html">Voltammetric Determination of Serine Using L‐Cysteine Modified Platinum Electrode and Brief Exploration from the Theoretical Perspective</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Xue Bingchun&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Xue Bingchun,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Fu 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