Article(id=1153986646665060894, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1153986642063905290, articleNumber=null, orderNo=null, doi=10.19812/j.cnki.jfsq11-5956/ts.20241204002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1733241600000, receivedDateStr=2024-12-04, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753061456599, onlineDateStr=2025-07-21, pubDate=1739548800000, pubDateStr=2025-02-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753061456599, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753061456599, creator=13701087609, updateTime=1753061456599, updator=13701087609, issue=Issue{id=1153986642063905290, tenantId=1146029695717560320, journalId=1149652044408987649, year='2025', volume='16', issue='3', pageStart='1', pageEnd='316', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753061455502, creator=13701087609, updateTime=1760070725729, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1183385652272968023, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1153986642063905290, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1183385652272968024, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1153986642063905290, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=276, endPage=282, ext={EN=ArticleExt(id=1153986647159988771, articleId=1153986646665060894, tenantId=1146029695717560320, journalId=1149652044408987649, language=EN, title=Study on the influencing factors and quality control of accuracy of sulfur dioxide detection in preserved fruits, columnId=1151895321388347923, journalTitle=Journal of Food Safety & Quality, columnName=Food Analysis and Detection, runingTitle=null, highlight=null, articleAbstract=
Objective To explore the factors affecting the accuracy of sulfur dioxide detection in preserves and its quality control. Methods Adopt internal quality control measures such as blank experiments, negative matrix testing, negative matrix labeling, quality control sample testing, and personnel parallelism and external quality control to conduct sulfur dioxide testing on preserved fruits. Verifyed the experimental effect with Z value, in depth discussion and analysed of the problems encountered in the process of sulfur dioxide detection and their solutions. Propose technical points for controlling and eliminating experimental deviations. Results The laboratory had passed measurement review and proficiency testing by the series of quality control measures formulated. Conclusion GB 5009.34—2022 National standards for food safety-Determination of sulfur dioxide in food acid-base titration method for detecting sulfur dioxide in food is prone to result deviation. This study proposes the development of various quality control measures, problems encountered during the detection process and their solutions, technical points for controlling and eliminating experimental deviation, which can help improve the accuracy of sulfur dioxide detection, and provide experimental references for other testing institutions to carry out this project.
, correspAuthors=Li-Ya ZHENG, 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, authorCompany=null, fund=null, authors=null, authorsList=Mao-Yue KANG, Man-Ling CHEN, Hai-Pei ZHU, Jun SHI, Lin-Shun XIE, Li-Ya ZHENG), CN=ArticleExt(id=1153986647562641961, articleId=1153986646665060894, tenantId=1146029695717560320, journalId=1149652044408987649, language=CN, title=蜜饯中二氧化硫检测准确度的影响因素及质量控制探究, columnId=1151895321958773274, journalTitle=食品安全质量检测学报, columnName=食品分析与检测, runingTitle=null, highlight=null, articleAbstract=
目的 探究蜜饯中二氧化硫检测准确度的影响因素及质量控制。方法 采取空白实验、阴性基质测试、阴性基质加标、质控样测试、人员平行等内部质量控制和测量审核、能力验证外部质量控制对蜜饯食品开展二氧化硫检测, 以Z值验证实验效果, 深入讨论分析检测过程中遇到的问题及解决思路, 提出控制和消除实验偏离的技术要点。结果 实验室通过制定的系列质量控制措施通过测量审核、能力验证, 评价结果为合格满意。结论 GB 5009.34—2022《食品安全国家标准 食品中二氧化硫的测定》酸碱滴定法检测食品中二氧化硫时容易产生结果偏离, 本研究提出各种质量控制措施、检测过程中遇到的问题及解决思路、控制和消除实验偏离的技术要点等可有助于二氧化硫检测准确性的提高, 也为其他检测机构在该项目的开展提供实验参考。
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Negative matrix spiked recovery test
, figureFileSmall=null, figureFileBig=null, tableContent=
SO32-质量 浓度/(μg/mL) | 梯度 | SO32-添加量 /mL | 加标含量 (以SO32-计)/μg | 加标含量换算 为以二氧化硫 计/μg | 样品 质量/g | 加标 理论值 /(mg/kg) | 本底值/(mg/kg) | 加标 实测值/(mg/kg) | 回收率 /% | 平均 回收值 /% |
| 1000 | 1 | 3.3 | 3300 | 2640 | 10.56 | 250.0 | 8.90 | 265.2 | 102.5 | 101.5 |
| 10.02 | 263.5 | 282.7 | 103.9 |
| 10.34 | 255.3 | 259.6 | 98.2 |
| 2 | 5.0 | 5000 | 4000 | 10.12 | 395.3 | 407.4 | 100.8 | 98.7 |
| 10.28 | 389.1 | 387.9 | 97.4 |
| 10.04 | 398.4 | 399.3 | 98.0 |
), ArticleFig(id=1183427903745307400, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表1, caption=
阴性基质加标回收测试
, figureFileSmall=null, figureFileBig=null, tableContent=
SO32-质量 浓度/(μg/mL) | 梯度 | SO32-添加量 /mL | 加标含量 (以SO32-计)/μg | 加标含量换算 为以二氧化硫 计/μg | 样品 质量/g | 加标 理论值 /(mg/kg) | 本底值/(mg/kg) | 加标 实测值/(mg/kg) | 回收率 /% | 平均 回收值 /% |
| 1000 | 1 | 3.3 | 3300 | 2640 | 10.56 | 250.0 | 8.90 | 265.2 | 102.5 | 101.5 |
| 10.02 | 263.5 | 282.7 | 103.9 |
| 10.34 | 255.3 | 259.6 | 98.2 |
| 2 | 5.0 | 5000 | 4000 | 10.12 | 395.3 | 407.4 | 100.8 | 98.7 |
| 10.28 | 389.1 | 387.9 | 97.4 |
| 10.04 | 398.4 | 399.3 | 98.0 |
), ArticleFig(id=1183427903804027657, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 2, caption=
Quality control sample testing
, figureFileSmall=null, figureFileBig=null, tableContent=
质控样 基质 | 指定值X/(g/kg) | 标准差σ/(g/kg) | 检测结果x/(g/kg) | Z值 |
| 菠萝蜜干 | 0.860 | 0.083 | 0.775 | ‒1.02 |
| 0.750 | ‒1.33 |
| 0.786 | ‒0.89 |
| 山楂干 | 1.628 | 0.153 | 1.602 | ‒0.17 |
| 1.570 | ‒0.38 |
| 1.591 | ‒0.24 |
), ArticleFig(id=1183427903904690954, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表2, caption=
质控样测试
, figureFileSmall=null, figureFileBig=null, tableContent=
质控样 基质 | 指定值X/(g/kg) | 标准差σ/(g/kg) | 检测结果x/(g/kg) | Z值 |
| 菠萝蜜干 | 0.860 | 0.083 | 0.775 | ‒1.02 |
| 0.750 | ‒1.33 |
| 0.786 | ‒0.89 |
| 山楂干 | 1.628 | 0.153 | 1.602 | ‒0.17 |
| 1.570 | ‒0.38 |
| 1.591 | ‒0.24 |
), ArticleFig(id=1183427903959216907, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 3, caption=
Blind sample testing by different personnel
, figureFileSmall=null, figureFileBig=null, tableContent=
| 人员 | 平行测定/(mg/kg) | 平均值x/(mg/kg) | 精密度/% |
| 1 | 2 |
| Ⅰ组 | 198 | 200 | 199 | 1.0 |
| Ⅱ组 | 199 | 203 | 201 | 2.0 |
), ArticleFig(id=1183427904055685903, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表3, caption=
不同人员盲样检测情况
, figureFileSmall=null, figureFileBig=null, tableContent=
| 人员 | 平行测定/(mg/kg) | 平均值x/(mg/kg) | 精密度/% |
| 1 | 2 |
| Ⅰ组 | 198 | 200 | 199 | 1.0 |
| Ⅱ组 | 199 | 203 | 201 | 2.0 |
), ArticleFig(id=1183427904126989074, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 4, caption=
Results of blind sample testing in this group
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| 实验室数量/家 | 指定值/(mg/kg) | 能力评定标准差/(mg/kg) | 指定值的标准不确定度/(mg/kg) | 稳健变异系数/% | 最小值/(mg/kg) | 最大值/(mg/kg) | 极差 /(mg/kg) |
| 45 | 184 | 13 | 2.5 | 7.2 | 110 | 216 | 106 |
), ArticleFig(id=1183427904219263766, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表4, caption=
本组盲样检测结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 实验室数量/家 | 指定值/(mg/kg) | 能力评定标准差/(mg/kg) | 指定值的标准不确定度/(mg/kg) | 稳健变异系数/% | 最小值/(mg/kg) | 最大值/(mg/kg) | 极差 /(mg/kg) |
| 45 | 184 | 13 | 2.5 | 7.2 | 110 | 216 | 106 |
), ArticleFig(id=1183427904332509976, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 5, caption=
Accuracy impact factor experiment
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 严格按照质量控制措施检测 | 影响实验结果准确度的实验 |
| 酸碱滴定法结果/(mg/kg) | 离子色谱法结果 /(mg/kg) | 影响因子 | 酸碱滴定法结果/(mg/kg) | 备注 |
| 样1 | 18.8 | 17.9 | 导管未深入吸收液液面底部导致吸收不充分 | 未检出 | 负向偏离 |
| 冷却循环水温变高, 高达30~40 ℃不等 | 40.1 | 正向偏离 |
| 样2 | 未检出 | 未检出 | 管路未清洗干净 | 15.4 | 正向偏离 |
| 样3 | 30.5 | 31.1 | 加热功率过大, 且沸腾后未处在微沸状态 | 40.2 | 正向偏离 |
| 氮气量不足, 流速过低 | 27.1 | 负向偏离 |
| 样4 | 25.2 | 24.5 | 忘加酸 | 未检出 | 负向偏离 |
| 样5 | 208.0 | 224.0 | H2O2吸收液未现用现配 | 190.0 | 负向偏离 |
| 样6 | 105.0 | 102.0 | 使用传统的玻璃搭建蒸馏装置, 连接处气密性不足导致不同程度漏气 | 80.2 | 负向偏离 |
| 样7 | 454.0 | 466.0 | 氮纯度未达99.9%以上 | 445.0 | 负向偏离 |
), ArticleFig(id=1183427904408007450, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表5, caption=
准确度影响因子实验
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 严格按照质量控制措施检测 | 影响实验结果准确度的实验 |
| 酸碱滴定法结果/(mg/kg) | 离子色谱法结果 /(mg/kg) | 影响因子 | 酸碱滴定法结果/(mg/kg) | 备注 |
| 样1 | 18.8 | 17.9 | 导管未深入吸收液液面底部导致吸收不充分 | 未检出 | 负向偏离 |
| 冷却循环水温变高, 高达30~40 ℃不等 | 40.1 | 正向偏离 |
| 样2 | 未检出 | 未检出 | 管路未清洗干净 | 15.4 | 正向偏离 |
| 样3 | 30.5 | 31.1 | 加热功率过大, 且沸腾后未处在微沸状态 | 40.2 | 正向偏离 |
| 氮气量不足, 流速过低 | 27.1 | 负向偏离 |
| 样4 | 25.2 | 24.5 | 忘加酸 | 未检出 | 负向偏离 |
| 样5 | 208.0 | 224.0 | H2O2吸收液未现用现配 | 190.0 | 负向偏离 |
| 样6 | 105.0 | 102.0 | 使用传统的玻璃搭建蒸馏装置, 连接处气密性不足导致不同程度漏气 | 80.2 | 负向偏离 |
| 样7 | 454.0 | 466.0 | 氮纯度未达99.9%以上 | 445.0 | 负向偏离 |
), ArticleFig(id=1183427904508670750, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 6, caption=
Possibility and solution of positive deviation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 产生正向偏离的可能性 | 控制和消除正向偏离的技术要点 |
| 1 | 未做空白校正 | 做完样品后需及时清洗管路, 尤其是二氧化硫高含量, 需消除空白影响, 做好空白校正 |
| 2 | 加热过猛, 导致部分盐酸挥发出来 | 沸腾后, 控制好加热功率保持微沸状态 |
| 3 | 氮气流速过大, 导致部分盐酸挥发出来 | 氮气流速控制1.2 L/min左右(具体根据仪器特性作调整) |
| 4 | 该实验加热时间较长, 冷却循环水温容易变高, 冷却效果变差导致部分酸性物质未被及时冷却而被氮气同步蒸馏出来, 影响滴定结果 | 实时关注冷却循环水温, 保持在15 °C以下 |
| 5 | 管路中高温部分使用硫化橡胶, 加热过程中硫化物被同步蒸出与H2O2反应生产硫酸影响滴定结果 | 更换蒸馏装置中易引入误差的硫化橡胶管等, 改用玻璃装置 |
| 6 | 部分食品尤其是此次考核盲样基质可能含酸性挥发物质或其他含硫化合物干扰滴定结果[10,22] | 排除因挥发物引起的假阳性干扰 |
| 7 | 假阳性干扰[10,23-24] | 检测部分食品需排除假阳性干扰, 如带挥发性物质的香辛料[26], 添加乙酸、乳酸、柠檬酸的酱腌菜等[25‒26] |
), ArticleFig(id=1183427904600945440, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表6, caption=
正向偏离的可能性及解决方案
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 产生正向偏离的可能性 | 控制和消除正向偏离的技术要点 |
| 1 | 未做空白校正 | 做完样品后需及时清洗管路, 尤其是二氧化硫高含量, 需消除空白影响, 做好空白校正 |
| 2 | 加热过猛, 导致部分盐酸挥发出来 | 沸腾后, 控制好加热功率保持微沸状态 |
| 3 | 氮气流速过大, 导致部分盐酸挥发出来 | 氮气流速控制1.2 L/min左右(具体根据仪器特性作调整) |
| 4 | 该实验加热时间较长, 冷却循环水温容易变高, 冷却效果变差导致部分酸性物质未被及时冷却而被氮气同步蒸馏出来, 影响滴定结果 | 实时关注冷却循环水温, 保持在15 °C以下 |
| 5 | 管路中高温部分使用硫化橡胶, 加热过程中硫化物被同步蒸出与H2O2反应生产硫酸影响滴定结果 | 更换蒸馏装置中易引入误差的硫化橡胶管等, 改用玻璃装置 |
| 6 | 部分食品尤其是此次考核盲样基质可能含酸性挥发物质或其他含硫化合物干扰滴定结果[10,22] | 排除因挥发物引起的假阳性干扰 |
| 7 | 假阳性干扰[10,23-24] | 检测部分食品需排除假阳性干扰, 如带挥发性物质的香辛料[26], 添加乙酸、乳酸、柠檬酸的酱腌菜等[25‒26] |
), ArticleFig(id=1183427904689025826, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=EN, label=Table 7, caption=
Possibility and solution of negative deviation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 产生负向偏离的可能性 | 控制和消除负向偏离的技术要点 |
| 1 | 吸收液按1.3.2处理时超过黄色终点, 未被舍弃 | 舍弃颜色校正过量的吸收液或者吸收液采取统一校正后再进行分装 |
| 2 | 使用传统的玻璃搭建蒸馏装置, 连接处气密性不足导致漏气 | 注意仪器装置的气密性, 实验前做好气密性测试 |
| 3 | 提取不充分, 导致结果偏低, 具体原因可能为: 提取时间不够、加热温度偏低、气流量偏低、样品量过多而加水量过少导致样品未充分被浸没提取、样品有结块等 | 合理调整称样量和水的比例, 对于蓬松的样品可减少取样量或加大水量以防浸提不充分 |
| 4 | 提取过程有损失, 导致结果偏低, 具体原因可能为: 氮气流量大甚至超过2.0 L/min导致吸收液来不及吸收产生的二氧化硫、吸收液接收器平底部过大导致液面高度不够、导管未深入液面底部导致吸收不充分等 | 尽量使用细长的接受容器, 使吸收液面尽量高; 吸收导管头部用使用尖头或在导管末端接移液枪头, 使产生的气泡变小变密以便被吸收; 接受瓶中可增加低速搅拌转子使吸收更充分; 氮气流速控制1.2 L/min左右 |
| 5 | 酸性条件不够, 导致反应不完全, 具体原因可能为: 加酸速度过慢导致蒸馏设备打开后部分二氧化硫气体跑走, 延迟加酸或忘加酸、酸浓度不够、酸量过少等 | 根据样品特性添加酸量, 加酸及时、快速; 对于过碱的样品, 需增大加酸量或减少取样量, 以保证提取环境处于酸性 |
| 6 | H2O2吸收液未现用现配、开封过久等导致其氧化性不足 | 严格按照标准进行, 现用现配 |
| 7 | 未使用高纯氮, 氮气纯度不够, 未达99.9%以上, 亚硫酸盐与其他杂质反应, 导致产生的二氧化硫偏少, 影响最终结果 | 氮气纯度>99.9% |
), ArticleFig(id=1183427904793883430, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1153986646665060894, language=CN, label=表7, caption=
负向偏离的可能性及解决方案
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 产生负向偏离的可能性 | 控制和消除负向偏离的技术要点 |
| 1 | 吸收液按1.3.2处理时超过黄色终点, 未被舍弃 | 舍弃颜色校正过量的吸收液或者吸收液采取统一校正后再进行分装 |
| 2 | 使用传统的玻璃搭建蒸馏装置, 连接处气密性不足导致漏气 | 注意仪器装置的气密性, 实验前做好气密性测试 |
| 3 | 提取不充分, 导致结果偏低, 具体原因可能为: 提取时间不够、加热温度偏低、气流量偏低、样品量过多而加水量过少导致样品未充分被浸没提取、样品有结块等 | 合理调整称样量和水的比例, 对于蓬松的样品可减少取样量或加大水量以防浸提不充分 |
| 4 | 提取过程有损失, 导致结果偏低, 具体原因可能为: 氮气流量大甚至超过2.0 L/min导致吸收液来不及吸收产生的二氧化硫、吸收液接收器平底部过大导致液面高度不够、导管未深入液面底部导致吸收不充分等 | 尽量使用细长的接受容器, 使吸收液面尽量高; 吸收导管头部用使用尖头或在导管末端接移液枪头, 使产生的气泡变小变密以便被吸收; 接受瓶中可增加低速搅拌转子使吸收更充分; 氮气流速控制1.2 L/min左右 |
| 5 | 酸性条件不够, 导致反应不完全, 具体原因可能为: 加酸速度过慢导致蒸馏设备打开后部分二氧化硫气体跑走, 延迟加酸或忘加酸、酸浓度不够、酸量过少等 | 根据样品特性添加酸量, 加酸及时、快速; 对于过碱的样品, 需增大加酸量或减少取样量, 以保证提取环境处于酸性 |
| 6 | H2O2吸收液未现用现配、开封过久等导致其氧化性不足 | 严格按照标准进行, 现用现配 |
| 7 | 未使用高纯氮, 氮气纯度不够, 未达99.9%以上, 亚硫酸盐与其他杂质反应, 导致产生的二氧化硫偏少, 影响最终结果 | 氮气纯度>99.9% |
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