Article(id=1198277724885316001, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198277724201644449, articleNumber=1009-5438(2023)03-0092-07, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1680451200000, receivedDateStr=2023-04-03, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763621272536, onlineDateStr=2025-11-20, pubDate=1687622400000, pubDateStr=2023-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763621272536, onlineIssueDateStr=2025-11-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763621272535, creator=13701087609, updateTime=1763621272535, updator=13701087609, issue=Issue{id=1198277724201644449, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='3', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763621272373, creator=13701087609, updateTime=1763621583776, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1198279030370829084, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198277724201644449, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1198279030370829085, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198277724201644449, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=92, endPage=98, ext={EN=ArticleExt(id=1198277726168773033, articleId=1198277724885316001, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Determination of Thorium Content in Iron Ore with Spectrophotometry, columnId=1187102804364640261, journalTitle=Science & Technology of Baotou Steel, columnName=Others, runingTitle=null, highlight=null, articleAbstract=
The iron ore samples are decomposed with the hydrochloric acid and hydrofluoric acid. After the perchloric acid smokes and silicon is eliminated, it is then extracted by butyl acetate solution of 1-phenyl-3-methyl-4- benzophthalide-5(PMBP). The interference elements of thorium are eliminated by the reextraction with hydrochloric acid, arsenazo III is as color developing agent and forms purple-red chelate with thorium ion as well as the thorium content in iron ore is determined with spectrophotometer. In the paper, the selection of acidity for extraction and reextraction, effects of such factors as acidity of chromogenic reaction, amount of color developing agent and color developing time on determination are discussed as well as experimental parameters are optimized. At the maximum absorption wavelength of 660 nm, the linearity range of thorium is determined to be 0~1.0 μg/mL, correlation coefficient is not less than 0.999 and detection limit is 0.000 44 μg/mL. This method is easy and simple to operate, molar absorption coefficient of the complex formed by arsenazo III and thorium is up to 0.8×105 L/(mol·cm), which is with higher sensitivity. The adding standard recovery of thorium in the analysis results of samples is 96.8%~105.8%, so the method is with good precision and accuracy.
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采用盐酸、氢氟酸分解铁矿石试样,高氯酸冒烟飞硅后,再经过1-苯基-3-甲基-4-苯甲酞墓咄哇酮-5(PMBP)的乙酸丁酯溶液萃取,盐酸反萃取消除钍的干扰元素,利用偶氮胂III为显色剂,与钍离子形成紫红色螯合物,通过分光光度计测定铁矿石中钍的含量。文章探讨了萃取及反萃取反应的酸度选择、显色反应的酸度、显色剂用量、显色时间等因素对测定的影响,并优化了试验参数。在最大吸收波长660 nm处,确定了钍的线性范围为0~1.0 μg/mL,相关系数不低于0.999,检出限为0.000 44 μg/mL。该方法操作简便,偶氮胂III与钍形成的络合物的摩尔吸光系数高达0.8×105 L/(mol·cm),具有较高的灵敏度,样品中钍分析结果的加标回收率在96.8%~105.8%,方法具有良好的精密度和准确度。
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周景涛(1969-),女,辽宁省瓦房店市人,硕士,正高级工程师,现从事冶金材料化学分析研究工作。
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1 内蒙古包钢钢联股份有限公司化检验中心,内蒙古 包头 014010, bio={"content":"
周景涛(1969-),女,辽宁省瓦房店市人,硕士,正高级工程师,现从事冶金材料化学分析研究工作。
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周景涛(1969-),女,辽宁省瓦房店市人,硕士,正高级工程师,现从事冶金材料化学分析研究工作。
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2 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)])])], keywords=[Keyword(id=1198292448586854444, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, orderNo=1, keyword=iron ore), Keyword(id=1198292448637186093, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, orderNo=2, keyword=determination), Keyword(id=1198292448687517742, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, orderNo=3, keyword=thorium), Keyword(id=1198292448758820911, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, orderNo=4, keyword=arsenazo III), Keyword(id=1198292448817541168, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, orderNo=5, keyword=spectrophotometry), Keyword(id=1198292448893038641, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, orderNo=1, keyword=铁矿石), Keyword(id=1198292448968536114, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, orderNo=2, keyword=测定), Keyword(id=1198292449023062067, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, orderNo=3, keyword=钍), Keyword(id=1198292449073393716, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, orderNo=4, keyword=偶氮胂III), Keyword(id=1198292449119531061, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, orderNo=5, keyword=分光光度法)], refs=[Reference(id=1198292452059738192, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, doi=null, pmid=null, pmcid=null, year=2014, volume=37, issue=6, pageStart=144, pageEnd=145, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=曲静, journalName=煤炭与化工, refType=null, unstructuredReference=曲静. 煤中钍的测定方法[J].
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1 Chemical Inspection Center of Inner Mongolia Baotou Steel Union Co., Ltd.,Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1198292447701856279, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, companyId=1198292447676690453, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 内蒙古包钢钢联股份有限公司化检验中心,内蒙古 包头 014010)]), AuthorCompany(id=1198292447760576536, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, xref=2, ext=[AuthorCompanyExt(id=1198292447768965145, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, companyId=1198292447760576536, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1198292447773159450, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, companyId=1198292447760576536, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)])], figs=[ArticleFig(id=1198292449387966518, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, label=null, caption=null, figureFileSmall=4t4Z06vsB59aXYSdYxXMJg==, figureFileBig=d3lJ//sSB8fNLRvGXOiEiQ==, tableContent=null), ArticleFig(id=1198292449450881079, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, label=图1, caption=
最佳波长选择, figureFileSmall=4t4Z06vsB59aXYSdYxXMJg==, figureFileBig=d3lJ//sSB8fNLRvGXOiEiQ==, tableContent=null), ArticleFig(id=1198292449522184248, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, label=null, caption=null, figureFileSmall=FOIbV/4Pn4++YKnfTmp1ig==, figureFileBig=391lLhLhEqUrwhVMEppwyQ==, tableContent=null), ArticleFig(id=1198292449572515897, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=CN, label=图2, caption=
校准工作曲线, figureFileSmall=FOIbV/4Pn4++YKnfTmp1ig==, figureFileBig=391lLhLhEqUrwhVMEppwyQ==, tableContent=null), ArticleFig(id=1198292449627041850, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198277724885316001, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 盐酸浓度/(mol·L-1) | 吸光度(A) |
| 2.0 | 0.108 |
| 3.0 | 0.107 |
| 3.5 | 0.101 |
| 4.0 | 0.112 |
| 4.5 | 0.111 |
| 5.0 | 0.110 |
| 6.0 | 0.108 |
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盐酸酸度的选择试验
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| 盐酸浓度/(mol·L-1) | 吸光度(A) |
| 2.0 | 0.108 |
| 3.0 | 0.107 |
| 3.5 | 0.101 |
| 4.0 | 0.112 |
| 4.5 | 0.111 |
| 5.0 | 0.110 |
| 6.0 | 0.108 |
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| 水平 | 因素A 显色剂用量 /mL | 因素B 显色时间 /min | 因素C 加入浓盐酸 体积/mL |
| 1 | 5.0 | 0 | 13 |
| 2 | 4.5 | 10 | 14 |
| 3 | 4.0 | 20 | 15 |
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试验因素与水平
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| 水平 | 因素A 显色剂用量 /mL | 因素B 显色时间 /min | 因素C 加入浓盐酸 体积/mL |
| 1 | 5.0 | 0 | 13 |
| 2 | 4.5 | 10 | 14 |
| 3 | 4.0 | 20 | 15 |
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试验 序号 | 显色剂用量 /mL | 显色时间 /min | 加入浓盐酸 体积/mL | 吸光度 |
| 1 | 5.0 | 0 | 13 | 0.414 |
| 2 | 5.0 | 10 | 14 | 0.413 |
| 3 | 5.0 | 20 | 15 | 0.365 |
| 4 | 4.5 | 0 | 14 | 0.485 |
| 5 | 4.5 | 10 | 15 | 0.438 |
| 6 | 4.5 | 20 | 13 | 0.459 |
| 7 | 4.0 | 0 | 15 | 0.475 |
| 8 | 4.0 | 10 | 13 | 0.534 |
| 9 | 4.0 | 20 | 14 | 0.547 |
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多因素选择的正交试验结果
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试验 序号 | 显色剂用量 /mL | 显色时间 /min | 加入浓盐酸 体积/mL | 吸光度 |
| 1 | 5.0 | 0 | 13 | 0.414 |
| 2 | 5.0 | 10 | 14 | 0.413 |
| 3 | 5.0 | 20 | 15 | 0.365 |
| 4 | 4.5 | 0 | 14 | 0.485 |
| 5 | 4.5 | 10 | 15 | 0.438 |
| 6 | 4.5 | 20 | 13 | 0.459 |
| 7 | 4.0 | 0 | 15 | 0.475 |
| 8 | 4.0 | 10 | 13 | 0.534 |
| 9 | 4.0 | 20 | 14 | 0.547 |
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试验 序号 | 显色剂用量 /mL | 显色时间 /min | 加入浓盐酸体积 /mL |
| T1 | 1.192 | 1.374 | 1.407 |
| T2 | 1.382 | 1.385 | 1.445 |
| T3 | 1.556 | 1.371 | 1.278 |
| t1 | 0.397 | 0.458 | 0.469 |
| t2 | 0.461 | 0.462 | 0.482 |
| t3 | 0.519 | 0.457 | 0.426 |
| R | 0.122 | 0.005 | 0.056 |
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正交试验结果分析
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试验 序号 | 显色剂用量 /mL | 显色时间 /min | 加入浓盐酸体积 /mL |
| T1 | 1.192 | 1.374 | 1.407 |
| T2 | 1.382 | 1.385 | 1.445 |
| T3 | 1.556 | 1.371 | 1.278 |
| t1 | 0.397 | 0.458 | 0.469 |
| t2 | 0.461 | 0.462 | 0.482 |
| t3 | 0.519 | 0.457 | 0.426 |
| R | 0.122 | 0.005 | 0.056 |
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| 1g/L偶氮胂Ⅲ溶液用量/mL | 吸光度(扣除空白) |
| 1.0 | 0.760 |
| 1.5 | 0.842 |
| 2.0 | 0.846 |
| 2.5 | 0.839 |
| 3.0 | 0.838 |
| 4.0 | 0.837 |
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显色剂用量扩展试验结果
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| 1g/L偶氮胂Ⅲ溶液用量/mL | 吸光度(扣除空白) |
| 1.0 | 0.760 |
| 1.5 | 0.842 |
| 2.0 | 0.846 |
| 2.5 | 0.839 |
| 3.0 | 0.838 |
| 4.0 | 0.837 |
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| 序号 | 钍标准溶液 /(μg·mL-1) | 吸光度 |
| 不放置 | 放置10 min | 放置20 min |
| 1 | 0.2 | 0.168 | 0.158 | 0.149 |
| 2 | 0.4 | 0.302 | 0.285 | 0.281 |
| 3 | 0.6 | 0.446 | 0.433 | 0.430 |
| 4 | 0.8 | 0.588 | 0.573 | 0.562 |
| 5 | 1.0 | 0.707 | 0.696 | 0.693 |
| 6 | 1.0 | 0.714 | 0.706 | 0.701 |
| 7 | 1.2 | 0.820 | 0.810 | 0.805 |
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显色时间的扩展试验结果
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| 序号 | 钍标准溶液 /(μg·mL-1) | 吸光度 |
| 不放置 | 放置10 min | 放置20 min |
| 1 | 0.2 | 0.168 | 0.158 | 0.149 |
| 2 | 0.4 | 0.302 | 0.285 | 0.281 |
| 3 | 0.6 | 0.446 | 0.433 | 0.430 |
| 4 | 0.8 | 0.588 | 0.573 | 0.562 |
| 5 | 1.0 | 0.707 | 0.696 | 0.693 |
| 6 | 1.0 | 0.714 | 0.706 | 0.701 |
| 7 | 1.2 | 0.820 | 0.810 | 0.805 |
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| 序号 | 加入2 μg/mL 钍标液体积/mL | 吸光度 |
不打铁基不加草盐 混酸和抗坏血酸 | 打铁基不加草盐 混酸和抗坏血酸 | 打铁基加草盐 混酸和抗坏血酸 | 打铁基加草盐 混酸不加抗坏血酸 |
| 1 | 0 | 0.006 | 0.528 | 0.011 | 0.049 |
| 2 | 2.00 | 0.078 | 0.413 | 0.047 | 0.135 |
| 3 | 5.00 | 0.163 | 0.400 | 0.134 | 0.278 |
| 4 | 10.00 | 0.334 | 0.484 | 0.285 | 0.467 |
| 5 | 15.00 | 0.498 | 0.514 | 0.450 | 0.640 |
| 6 | 20.00 | 0.673 | 0.451 | 0.598 | 0.834 |
| 7 | 25.00 | 0.832 | 0.272 | 0.743 | 1.001 |
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铁基干扰试验
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| 序号 | 加入2 μg/mL 钍标液体积/mL | 吸光度 |
不打铁基不加草盐 混酸和抗坏血酸 | 打铁基不加草盐 混酸和抗坏血酸 | 打铁基加草盐 混酸和抗坏血酸 | 打铁基加草盐 混酸不加抗坏血酸 |
| 1 | 0 | 0.006 | 0.528 | 0.011 | 0.049 |
| 2 | 2.00 | 0.078 | 0.413 | 0.047 | 0.135 |
| 3 | 5.00 | 0.163 | 0.400 | 0.134 | 0.278 |
| 4 | 10.00 | 0.334 | 0.484 | 0.285 | 0.467 |
| 5 | 15.00 | 0.498 | 0.514 | 0.450 | 0.640 |
| 6 | 20.00 | 0.673 | 0.451 | 0.598 | 0.834 |
| 7 | 25.00 | 0.832 | 0.272 | 0.743 | 1.001 |
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| 测定元素 | 萃取 | | 不萃取 | 证书 标准值 |
| 试剂空白 | 平行1 | 平行2 | 试剂空白 | 平行1 | 平行2 |
| Th | 0.029 | 0.079 3 | 0.076 8 | | 0.015 | 0.074 7 | 0.073 2 | 0.073 7 |
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铁矿石其他元素干扰试验(质量分数)%
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| 测定元素 | 萃取 | | 不萃取 | 证书 标准值 |
| 试剂空白 | 平行1 | 平行2 | 试剂空白 | 平行1 | 平行2 |
| Th | 0.029 | 0.079 3 | 0.076 8 | | 0.015 | 0.074 7 | 0.073 2 | 0.073 7 |
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| 测定元素 | 平均值 | 标准偏差 | 检出限 | 测定下限 |
| Th | 0.001 235 | 0.000 146 7 | 0.000 44 | 0.004 4 |
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钍检出限和测定范围%
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| 测定元素 | 平均值 | 标准偏差 | 检出限 | 测定下限 |
| Th | 0.001 235 | 0.000 146 7 | 0.000 44 | 0.004 4 |
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| 标准样品号 | 测定值 | 平均值 | 标准值 | 标准偏差 | 相对标准偏差 |
| 29XT61098 | 0.073 1,0.073 4,0.074 7,0.074 8,0.074 2,0.074 4, 0.072 2,0.071 2,0.073 5,0.071 3,0.072 0 | 0.073 2 | 0.073 7 | 0.001 32 | 1.8 |
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准确度与精密度%
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| 标准样品号 | 测定值 | 平均值 | 标准值 | 标准偏差 | 相对标准偏差 |
| 29XT61098 | 0.073 1,0.073 4,0.074 7,0.074 8,0.074 2,0.074 4, 0.072 2,0.071 2,0.073 5,0.071 3,0.072 0 | 0.073 2 | 0.073 7 | 0.001 32 | 1.8 |
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| 测定元素 | 标加量/μg | 理论值/μg | 测定值/μg | 平均值/μg | 回收率/% |
| Th | 0 | 73.7 | 73.4 | 73.2 | |
| Th | 0 | 73.7 | 73.1 | | |
| Th | 50 | 123.7 | 121.6 | 123.8 | 96.8 |
| Th | 50 | 123.7 | 126.1 | | 105.8 |
| Th | 100 | 173.7 | 174.5 | 175.3 | 101.3 |
| Th | 100 | 173.7 | 176.1 | | 102.9 |
| Th | 500 | 573.7 | 568.4 | 570.4 | 99.0 |
| Th | 500 | 573.7 | 572.4 | | 99.8 |
| Th | 900 | 973.7 | 980.2 | 975.4 | 100.8 |
| Th | 900 | 973.7 | 970.5 | | 99.7 |
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准确度与精密度
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| 测定元素 | 标加量/μg | 理论值/μg | 测定值/μg | 平均值/μg | 回收率/% |
| Th | 0 | 73.7 | 73.4 | 73.2 | |
| Th | 0 | 73.7 | 73.1 | | |
| Th | 50 | 123.7 | 121.6 | 123.8 | 96.8 |
| Th | 50 | 123.7 | 126.1 | | 105.8 |
| Th | 100 | 173.7 | 174.5 | 175.3 | 101.3 |
| Th | 100 | 173.7 | 176.1 | | 102.9 |
| Th | 500 | 573.7 | 568.4 | 570.4 | 99.0 |
| Th | 500 | 573.7 | 572.4 | | 99.8 |
| Th | 900 | 973.7 | 980.2 | 975.4 | 100.8 |
| Th | 900 | 973.7 | 970.5 | | 99.7 |
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