Article(id=1311350705076658344, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1311350424792301947, articleNumber=null, orderNo=null, doi=10.13355/j.cnki.sfyj.2026.02.017, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1764691200000, receivedDateStr=2025-12-03, revisedDate=1766073600000, revisedDateStr=2025-12-19, acceptedDate=null, acceptedDateStr=null, onlineDate=1790579971808, onlineDateStr=2026-09-28, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790579971808, onlineIssueDateStr=2026-09-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790579971808, creator=13701087609, updateTime=1790579971808, updator=13701087609, issue=Issue{id=1311350424792301947, tenantId=1146029695717560320, journalId=1146120122248306696, year='2026', volume='45', issue='2', pageStart='129', pageEnd='272', issueExtLink='null', onlineDate='null', pubDate='1776614400000', pubDateStr='2026-04-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1790579904983, creator='13701087609', updateTime=1790588502603, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1311386485903942043, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1311350424792301947, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1311386485903942044, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1311350424792301947, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=264, endPage=272, ext={EN=ArticleExt(id=1311350705290567849, articleId=1311350705076658344, tenantId=1146029695717560320, journalId=1146120122248306696, language=EN, title=Redox Titration Analysis of Fe²⁺/Fe³⁺ Concentration in Zinc Hydrometallurgical Solution Using TiCl₃-K₂Cr₂O₇, columnId=1152626775315067837, journalTitle=Hydrometallurgy of China, columnName=Analysis, runingTitle=null, highlight=null, articleAbstract=

The TiCl₃-K₂Cr₂O₇ redox titration method is used to determine the concentrations of Fe²⁺/Fe³⁺ in the solution after oxygen pressure leaching, neutralization, and iron removal of zinc hydrometallurgy. The results show that for samples with high iron concentrations (10-20 g/L), the relative error of this method is controlled within 2%, and the relative standard deviation (RSD) is less than 1%. For low iron concentration samples (around 1 g/L), the relative error remains below the permissible standard. The spike recovery test achieves a recovery rate of 100.1% with RSD of 0.32%. This method effectively improves the accuracy of endpoint judgment by accurately controlling the endpoint of 'tungsten blue'. The interference elements such as copper ions are separated by ammonia water, which reduces the influence of other metal ions on the determination. At the same time, a clear and simple two-step redox procedure is adopted:the excess Ti³⁺ is first oxidized with air to avoid the interference of titanium ions, so that only Fe²⁺ to be measured remains in the system, and then the titration is carried out with potassium dichromate. The titration end point is determined with sodium diphenylamine sulfonate as the indicator. The color of the solution changes from green to purple/blue, and the color change is sensitive and stable, which effectively reduces the subjective error, thus realizing the rapid and accurate determination of Fe²⁺/Fe³⁺ in complex polymetallic solution. This method is especially suitable for high-content iron systems, which can provide a reliable analysis method for zinc hydrometallurgy process control.

, authors=Yiling YAO¹, Xiaohua PENG^{2, 3}, Jianke LI¹, Weiwei LIU^{2, 3}, Dongsong YANG¹, Wei ZOU^{2, 3}, Jiayi BAO^{2, 3}, authorsList=Yiling YAO, Xiaohua PENG, Jianke LI, Weiwei LIU, Dongsong YANG, Wei ZOU, Jiayi BAO, authorCompany=null, correspAuthors=Weiwei LIU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1311350705684832426, articleId=1311350705076658344, tenantId=1146029695717560320, journalId=1146120122248306696, language=CN, title=基于TiCl₃-K₂Cr₂O₇氧化还原滴定法的湿法炼锌溶液中Fe²⁺/Fe³⁺浓度测定, columnId=1153757614107255582, journalTitle=湿法冶金, columnName=分析测试, runingTitle=null, highlight=null, articleAbstract=

研究采用TiCl₃-K₂Cr₂O₇氧化还原滴法测定湿法炼锌氧压浸出液、中和后液和除铁后液中的Fe²⁺/Fe³⁺浓度。结果表明：该法在测定10~20 g/L高铁浓度样品时，相对误差可控制在2%以内，相对标准偏差（RSD）小于1%；对于1 g/L左右的低铁浓度样品，相对误差仍低于允许标准；加标试验回收率达100.1%，RSD为0.32%。该法通过精准控制"钨蓝"指示终点，有效提升了终点判断的准确性；利用氨水分离铜离子等干扰元素，减少了其他金属离子对测定的影响。同时，采用清晰、简单的两步氧化还原程序：先将过剩的 Ti³⁺用空气氧化，避免钛离子干扰，使体系中仅剩下待测的 Fe²⁺，再用重铬酸钾进行滴定，滴定终点以二苯胺磺酸钠作指示剂，溶液颜色由绿变为紫/蓝，颜色变化敏锐且稳定，有效降低了主观误差，从而实现了对复杂多金属溶液中Fe²⁺/Fe³⁺的快速、准确测定。该法特别适用于高含量铁体系，可为湿法炼锌工艺控制提供可靠分析手段。

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姚依玲（1993—），女，本科，工程师，主要研究方向为冶金检验分析。

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姚依玲（1993—），女，本科，工程师，主要研究方向为冶金检验分析。

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