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Objective To study the determination of mercury and arsenic content in soil by microwave digestion/atomic fluorescence method. Methods In this study, microwave digestion was used as the pretreatment, by optimizing the digestion temperature, digestion solution dosage and other parameters, digested with aqua regia (a mixture of hydrochloric acid and nitric acid), and the contents of mercury and arsenic in the samples were determined by atomic fluorescence. Results The results showed that the correlation coefficients of the standard curves of mercury and arsenic were 0.9996 and 0.9999, and the detection limits of the method were 0.0011 mg/kg and${0.0096}\mathrm{{mg}}/\mathrm{{kg}}$, respectively. The relative standard deviation of parallel experiments was${1.3}\%\sim {8.7}\%$, all of which were within 10%. The recoveries were 91.2%~117.4% and 86.0%~98.0%, respectively. The measured values of the certified reference materials are all within the theoretical range. Conclusion By optimizing digestion temperature, digestion solution dosage and other parameters, the method is accurate, simple, reliable and has good practicability.
, correspAuthors=Hai-Xia CHEN, authorNote=null, correspAuthorsNote=
*CHEN Hai-Xia, Assistant Engineer, Guangzhou Jianyan Engineering Testing Service Co., Ltd., Guangzhou 510663, China. E-mail:
1006212158@qq.com , 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, authorCompany=null, fund=null, authors=null, authorsList=Hai-Xia CHEN), CN=ArticleExt(id=1156668093985312770, articleId=1156668071092802309, tenantId=1146029695717560320, journalId=1146119944283992078, language=CN, title=微波消解-原子荧光法测定土壤中汞砷含量, columnId=1151957373175820401, journalTitle=实验室检测, columnName=创新应用, runingTitle=null, highlight=null, articleAbstract=
目的 研究微波消解一原子荧光法测定土壤中汞砷的含量。方法 本研究采用微波消解法为前处理方法, 通过优化了消解温度、消解液用量等参数,用王水 ( 盐酸和硝酸混合液 ) 进行消解,并用原子荧光法测定样品中汞和砷的含量。结果 汞砷标准曲线的相关性系数分别为 0.9996 和 0.9999 ;方法检出限分别为0.0011、0.0096 mg/kg; 平行实验相对标准偏差在${1.3}\%\sim {8.7}\%$,均在 10%以内;加标回收率分别在 91.2%~117.4% 和86.0%~98.0%;有证标准物质测定值均在理论值范围内。结论 通过优化消解温度、消解液用量等参数, 本方法测定结果准确, 简单、可靠、具有较好的实用性。
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陈海霞,助理工程师,研究方向为环境监测。
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陈海霞,助理工程师,研究方向为环境监测。
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37(02): 100-102., articleTitle=土壤中重金属检测方法的应用研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1156668112670937497, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, xref=null, ext=[AuthorCompanyExt(id=1156668112675131802, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, companyId=1156668112670937497, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Guangzhou Jianyan Engineering Testing Service Co., Ltd. Guangzhou 510663 China), AuthorCompanyExt(id=1156668112679326107, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, companyId=1156668112670937497, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=广州建研工程检测服务有限公司 广州 510663)])], figs=[ArticleFig(id=1156668117070762509, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Fig. 1, caption=
Effect of different digestion temperatures on mercury and arsenic results, figureFileSmall=FRw1n2BihfMw0NeW7FhEVw==, figureFileBig=o+XT9hdq5gIKA0FNTQ+g0g==, tableContent=null), ArticleFig(id=1156668117192397326, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=图 1, caption=
不同消解温度对汞、砷结果的影响, figureFileSmall=FRw1n2BihfMw0NeW7FhEVw==, figureFileBig=o+XT9hdq5gIKA0FNTQ+g0g==, tableContent=null), ArticleFig(id=1156668117267894799, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Fig. 2, caption=
Effect of different digestion volumes on mercury and arsenic results, figureFileSmall=OK3VSIqvkiXpeeNaFvFb1g==, figureFileBig=AgB1Psf5B6BniL+TzWcg2w==, tableContent=null), ArticleFig(id=1156668117355975184, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=图 2, caption=
不同消解液体积对汞、砷结果的影响, figureFileSmall=OK3VSIqvkiXpeeNaFvFb1g==, figureFileBig=AgB1Psf5B6BniL+TzWcg2w==, tableContent=null), ArticleFig(id=1156668117431472657, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Table 1, caption=
Instrument setup parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 元素名称 | 汞 | 砷 |
| 灯电流(mA) | 30 | 60 |
| 负高压(V) | 300 | 300 |
| 原子化高度(nm) | 10 | 10 |
| 载气流量(mL/min) | 400 | 400 |
| 屏蔽气流量(mL/min) | 1000 | 900 |
| 灵敏线波长(nm) | 253.7 | 193.7 |
| 读数时间(s) | 10 | 10 |
| 延迟时间(s) | 1 | 1 |
| 读数方式 | 峰面积 | 峰面积 |
), ArticleFig(id=1156668117498581522, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=表 1, caption=
仪器设置参数, figureFileSmall=null, figureFileBig=null, tableContent=
| 元素名称 | 汞 | 砷 |
| 灯电流(mA) | 30 | 60 |
| 负高压(V) | 300 | 300 |
| 原子化高度(nm) | 10 | 10 |
| 载气流量(mL/min) | 400 | 400 |
| 屏蔽气流量(mL/min) | 1000 | 900 |
| 灵敏线波长(nm) | 253.7 | 193.7 |
| 读数时间(s) | 10 | 10 |
| 延迟时间(s) | 1 | 1 |
| 读数方式 | 峰面积 | 峰面积 |
), ArticleFig(id=1156668117574078995, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Table 2, caption=
Reagent specifications and manufacturers, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 | 规格型号 | 生产厂家 |
| 盐酸 | GR | 国药集团化学试剂有限公司 |
| 硝酸 | GR | 国药集团化学试剂有限公司 |
| 硼氢化钾 | GR | 旭化成化学 |
| 硫脲 | AR | 天津市科密欧化学试剂有限公司 |
| 抗坏血酸 | AR | 天津市大茂化学试剂厂 |
| 氢氧化钾 | GR | 天津市科密欧化学试剂有限公司 |
| 汞标准溶液 | 标准物质 | 环境标准样品研究所 |
| 砷标准溶液 | 标准物质 | 环境标准样品研究所 |
), ArticleFig(id=1156668117632799252, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=表 2, caption=
试剂规格和厂家, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 | 规格型号 | 生产厂家 |
| 盐酸 | GR | 国药集团化学试剂有限公司 |
| 硝酸 | GR | 国药集团化学试剂有限公司 |
| 硼氢化钾 | GR | 旭化成化学 |
| 硫脲 | AR | 天津市科密欧化学试剂有限公司 |
| 抗坏血酸 | AR | 天津市大茂化学试剂厂 |
| 氢氧化钾 | GR | 天津市科密欧化学试剂有限公司 |
| 汞标准溶液 | 标准物质 | 环境标准样品研究所 |
| 砷标准溶液 | 标准物质 | 环境标准样品研究所 |
), ArticleFig(id=1156668117695713813, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Table 3, caption=
Precision result table, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 样品编号 | 各次测定值 (mg/kg) | 平均值(mg/kg) | 标准偏差 $S$ | 相对标准偏差 RSD(%) |
| 1 | 2 | 3 | 4 | 5 | 6 |
| 汞 | GSS-4a | 0.073 | 0.073 | 0.070 | 0.069 | 0.071 | 0.070 | 0.071 | 0.0017 | 2.4 |
| GSS-8a | 0.023 | 0.025 | 0.024 | 0.026 | 0.025 | 0.023 | 0.024 | 0.0012 | 5.0 |
| 样品① | 0.098 | 0.082 | 0.092 | 0.078 | 0.082 | 0.093 | 0.084 | 0.012 | 8.7 |
| 样品② | 0.440 | 0.406 | 0.388 | 0.413 | 0.410 | 0.388 | 0.408 | 0.018 | 4.3 |
| 砷 | GSS-4a | 9.1 | 9.1 | 9.4 | 9.8 | 9.7 | 9.2 | 9.4 | 0.31 | 3.3 |
| GSS-8a | 13.0 | 13.7 | 13.6 | 12.5 | 12.8 | 12.0 | 13.0 | 0.65 | 5.0 |
| 样品① | 8.01 | 7.88 | 8.01 | 8.74 | 8.74 | 8.50 | 8.31 | 0.36 | 4.3 |
| 样品② | 54.1 | 53.9 | 53.9 | 53.0 | 53.6 | 52.1 | 53.4 | 0.69 | 1.3 |
), ArticleFig(id=1156668117754434071, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=表 3, caption=
精密度结果表, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 样品编号 | 各次测定值 (mg/kg) | 平均值(mg/kg) | 标准偏差 $S$ | 相对标准偏差 RSD(%) |
| 1 | 2 | 3 | 4 | 5 | 6 |
| 汞 | GSS-4a | 0.073 | 0.073 | 0.070 | 0.069 | 0.071 | 0.070 | 0.071 | 0.0017 | 2.4 |
| GSS-8a | 0.023 | 0.025 | 0.024 | 0.026 | 0.025 | 0.023 | 0.024 | 0.0012 | 5.0 |
| 样品① | 0.098 | 0.082 | 0.092 | 0.078 | 0.082 | 0.093 | 0.084 | 0.012 | 8.7 |
| 样品② | 0.440 | 0.406 | 0.388 | 0.413 | 0.410 | 0.388 | 0.408 | 0.018 | 4.3 |
| 砷 | GSS-4a | 9.1 | 9.1 | 9.4 | 9.8 | 9.7 | 9.2 | 9.4 | 0.31 | 3.3 |
| GSS-8a | 13.0 | 13.7 | 13.6 | 12.5 | 12.8 | 12.0 | 13.0 | 0.65 | 5.0 |
| 样品① | 8.01 | 7.88 | 8.01 | 8.74 | 8.74 | 8.50 | 8.31 | 0.36 | 4.3 |
| 样品② | 54.1 | 53.9 | 53.9 | 53.0 | 53.6 | 52.1 | 53.4 | 0.69 | 1.3 |
), ArticleFig(id=1156668117838320156, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=EN, label=Table 4, caption=
Reference material result table, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 样品编号 | 各次测定值 (mg/kg) | 平均值(mg/kg) | 相对误差 RE (%) | 理论值(mg/kg) |
| 1 | 2 | 3 | 4 | 5 | 6 |
| 汞 | ERM-S-510204 | 0.220 | 0.211 | 0.183 | 0.187 | 0.208 | 0.189 | 0.200 | -9.4~8.9 | ${0.202}\pm {0.021}$ |
| GSS-27 | 0.110 | 0.114 | 0.123 | 0.121 | 0.111 | 0.127 | 0.118 | $-{5.2}\sim {9.5}$ | ${0.116}\pm {0.012}$ |
| GSS-77 | 0.103 | 0.099 | 0.102 | 0.098 | 0.098 | 0.096 | 0.099 | $-{3.0}\sim {4.0}$ | ${0.099}\pm {0.005}$ |
| 砷 | ERM-S-510204 | 82.5 | 86.6 | 84.3 | 85.3 | 91.7 | 81.6 | 85.3 | $-{3.7}\sim {8.3}$ | ${84.7}\pm {12.4}$ |
| GSS-27 | 13.1 | 13.4 | 13.9 | 12.9 | 13.0 | 13.7 | 13.3 | $-{3.0}\sim {4.5}$ | ${13.3}\pm {1.1}$ |
| GSS-77 | 8.4 | 8.1 | 8.1 | 7.8 | 8.0 | 7.8 | 8.0 | $-{2.5}\sim {5.0}$ | ${8.1}\pm {0.3}$ |
), ArticleFig(id=1156668117926400544, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156668071092802309, language=CN, label=表 4, caption=
标准物质结果表, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 样品编号 | 各次测定值 (mg/kg) | 平均值(mg/kg) | 相对误差 RE (%) | 理论值(mg/kg) |
| 1 | 2 | 3 | 4 | 5 | 6 |
| 汞 | ERM-S-510204 | 0.220 | 0.211 | 0.183 | 0.187 | 0.208 | 0.189 | 0.200 | -9.4~8.9 | ${0.202}\pm {0.021}$ |
| GSS-27 | 0.110 | 0.114 | 0.123 | 0.121 | 0.111 | 0.127 | 0.118 | $-{5.2}\sim {9.5}$ | ${0.116}\pm {0.012}$ |
| GSS-77 | 0.103 | 0.099 | 0.102 | 0.098 | 0.098 | 0.096 | 0.099 | $-{3.0}\sim {4.0}$ | ${0.099}\pm {0.005}$ |
| 砷 | ERM-S-510204 | 82.5 | 86.6 | 84.3 | 85.3 | 91.7 | 81.6 | 85.3 | $-{3.7}\sim {8.3}$ | ${84.7}\pm {12.4}$ |
| GSS-27 | 13.1 | 13.4 | 13.9 | 12.9 | 13.0 | 13.7 | 13.3 | $-{3.0}\sim {4.5}$ | ${13.3}\pm {1.1}$ |
| GSS-77 | 8.4 | 8.1 | 8.1 | 7.8 | 8.0 | 7.8 | 8.0 | $-{2.5}\sim {5.0}$ | ${8.1}\pm {0.3}$ |
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