Article(id=1156967445866042322, tenantId=1146029695717560320, journalId=1146119944283992078, issueId=1156967445161402379, articleNumber=null, orderNo=null, doi=10.2169/internalmedicine.1730-23, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753772134509, onlineDateStr=2025-07-29, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753772134509, onlineIssueDateStr=2025-07-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753772134509, creator=13701087609, updateTime=1753772134509, updator=13701087609, issue=Issue{id=1156967445161402379, tenantId=1146029695717560320, journalId=1146119944283992078, year='2024', volume='2', issue='6', pageStart='1', pageEnd='160', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=0, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753772134342, creator=13701087609, updateTime=1753777952624, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1156991848855200553, tenantId=1146029695717560320, journalId=1146119944283992078, issueId=1156967445161402379, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1156991848855200554, tenantId=1146029695717560320, journalId=1146119944283992078, issueId=1156967445161402379, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=28, endPage=32, ext={EN=ArticleExt(id=1156967446415496148, articleId=1156967445866042322, tenantId=1146029695717560320, journalId=1146119944283992078, language=EN, title=Determination of caffeine content in instant milk tea by liquid chromatography, columnId=1156641065621906129, journalTitle=Laboratory Testing, columnName=Innovative Applications, runingTitle=null, highlight=null, articleAbstract=
Objective To establish a new liquid chromatographic methodfor caffeine content in milk tea, to detect the caffeine content ofinstant milk tea in the region, and to make recommendations on healtheffects. Methods The determination was carried out on a Waters highperformance liquid chromatography Symmetry C18 column $\left({{5\mu}\mathrm{m}\times {150}\mathrm{\;{mm}}\times {4.6}\mathrm{\;{mm}}}\right)$ ,the mobile phase was methanol-water $\left({{30}+ {70}}\right)$ at a flow rateof $1\mathrm{\;{mL}}/\mathrm{{min}}$ ,the detection wavelength of ${272}\mathrm{\;{nm}}$ , and the columntemperature was ${35}^{\circ }\mathrm{C}$ . Results Thecorrelation coefficient was $\mathrm{r}={0.9999}$ over the linear range of 1-30 μg/mL, the recoverieswere 97.2%-99.5%, and the method precision was ${0.54}\%$ . Conclusion The method adoptspotassiun ferrocyanide and zinc acetate precipitation centrifugation,which can rapidly extract the effective components of caffeine in milktea and remove the interference of proteins, shorten the pretreatmenttime, optimize the chromatographic conditions, and accelerate thedetection of caffeine.
, correspAuthors=Yan-Yan WEI, authorNote=null, correspAuthorsNote=
*Wei Yan-Yan,undergraduate, Technologist-in- Charge, Inspector, Chongqing Kaizhou District Disease Control and Prevention Center, Chongqing 405499,China. E-mail:
765198900@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=Yan-Yan WEI, Liang ZHOU, Bo REN), CN=ArticleExt(id=1156967496071860872, articleId=1156967445866042322, tenantId=1146029695717560320, journalId=1146119944283992078, language=CN, title=液相色谱法检测速溶奶茶中咖啡因含量, columnId=1151957373175820401, journalTitle=实验室检测, columnName=创新应用, runingTitle=null, highlight=null, articleAbstract=
目的 建立一种新的奶茶中咖啡因含量的液相色谱法,检测本区速溶奶茶咖啡因含量,提出健康影响建议。 方法 采用waters 高效液相色谱 Symmetry C18 $\left({{5\mu}\mathrm{m}\times {150}\mathrm{\;{mm}}\times {4.6}\mathrm{\;{mm}}}\right)$ 柱进行测定,以甲醇水 $\left({{30}+{70}}\right)$ 为流动相,流速为 $1\mathrm{\;{mL}}/\mathrm{{min}}$ ,检测波长 ${272}\mathrm{\;{nm}}$ ,柱温为 ${35}^{\circ }\mathrm{C}$ 。结果 $1 \sim {30\mu }\mathrm{g}/\mathrm{{mL}}$ 线性范围内,相关系数 $\mathrm{r}={0.9999}$ ,回收率为 97.2%~99.5%,方法精密度 0.54%。结论 该方法采取亚铁氰化钾和乙酸锌沉淀离心,能够迅速提取奶茶中咖啡因有效成分,并能去除蛋白质的干扰, 缩短了前处理时间, 优化了色谱条件,加速了咖啡因的检测。
, correspAuthors=魏艳艳, authorNote=null, correspAuthorsNote=
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 |
魏艳艳,主管技师,检验员,研究方向为理化检验。 |
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2008., articleTitle=GB/T 21733-2008 茶饮料, refAbstract=null), Reference(id=1156967502094881590, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, doi=null, pmid=null, pmcid=null, year=2014, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[14], rfOrder=13, authorNames=中华人民共和国国家质量监督检验检疫总局, journalName=null, refType=null, unstructuredReference=中华人民共和国国家质量监督检验检疫总局. GB 2760-2014 食品添加剂使用标准[S]. 北京: 中国标准出版社,
2014., articleTitle=GB 2760-2014 食品添加剂使用标准, refAbstract=null), Reference(id=1156967502149407543, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, doi=null, pmid=null, pmcid=null, year=2015, volume=13, issue=05, pageStart=4102, pageEnd=null, url=null, language=null, rfNumber=[15], rfOrder=14, authorNames=EFSA NDA Panel (EFSA Panel on Dietetic Products, Nutrition
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2014 -09-30)[2024-04-20]. http://news.foodmate.net/2014/09/277898.html., articleTitle=欧盟规定能量饮料应突出咖啡因警告标志, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1156967497078493876, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, xref=null, ext=[AuthorCompanyExt(id=1156967497086882485, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, companyId=1156967497078493876, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Kaizhou Disease Prevention and Control Center Chongqing 405499 China), AuthorCompanyExt(id=1156967497091076790, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, companyId=1156967497078493876, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=重庆开州区疾病预防控制中心 重庆开州区,重庆 405499)])], figs=[ArticleFig(id=1156967500240999177, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 1, caption=
Methanol-water (20-80), figureFileSmall=WkXhlgEjqTmAHliOXnG6Vw==, figureFileBig=CNnImkzhrjQwCQuXSOXXYQ==, tableContent=null), ArticleFig(id=1156967500303913740, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 1, caption=
甲醇 - 水( 20-80 ), figureFileSmall=WkXhlgEjqTmAHliOXnG6Vw==, figureFileBig=CNnImkzhrjQwCQuXSOXXYQ==, tableContent=null), ArticleFig(id=1156967500362633998, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 2, caption=
Methanol-water (24-76), figureFileSmall=f10T6y5fGYc8ctlPGhgrFg==, figureFileBig=lqO/V1TsDw7Ueil9/TDHJg==, tableContent=null), ArticleFig(id=1156967500433937170, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 2, caption=
甲醇 - 水(24-76), figureFileSmall=f10T6y5fGYc8ctlPGhgrFg==, figureFileBig=lqO/V1TsDw7Ueil9/TDHJg==, tableContent=null), ArticleFig(id=1156967500496851733, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 3, caption=
Methanol-water (30-70), figureFileSmall=/IV2ahx074k1mHqgXcINpg==, figureFileBig=VV81rYgAmPYPxW0T8dKecg==, tableContent=null), ArticleFig(id=1156967500576543512, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 3, caption=
甲醇 - 水( 30-70 ), figureFileSmall=/IV2ahx074k1mHqgXcINpg==, figureFileBig=VV81rYgAmPYPxW0T8dKecg==, tableContent=null), ArticleFig(id=1156967500647846682, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 4, caption=
Chromatogram of a standard solution of caffeine at ${15\mu }\mathrm{g}/\mathrm{{mL}}$, figureFileSmall=Mynf85VaDefjsd8OoV6gyw==, figureFileBig=tqvuekDZOdaalzQk6oHM9Q==, tableContent=null), ArticleFig(id=1156967500706566940, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 4, caption=
${15\mu }\mathrm{g}/\mathrm{{mL}}$ 的咖啡因标准溶液色谱图, figureFileSmall=Mynf85VaDefjsd8OoV6gyw==, figureFileBig=tqvuekDZOdaalzQk6oHM9Q==, tableContent=null), ArticleFig(id=1156967500769481502, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 5, caption=
Calibration curve diagram, figureFileSmall=vM/aC9XtGMqVTQ6yqfIC7Q==, figureFileBig=USbUUA9sV/FJeQy1h7nTJg==, tableContent=null), ArticleFig(id=1156967500844978975, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 5, caption=
校准曲线图, figureFileSmall=vM/aC9XtGMqVTQ6yqfIC7Q==, figureFileBig=USbUUA9sV/FJeQy1h7nTJg==, tableContent=null), ArticleFig(id=1156967500895310624, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Fig. 6, caption=
Chromatogram of instant milk tea sample, figureFileSmall=POVyrmGaVwvolMEChDwo7g==, figureFileBig=lEVmnjuKn8a19Jru+5Uk0Q==, tableContent=null), ArticleFig(id=1156967500949836577, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=图 6, caption=
奶茶样品色谱图, figureFileSmall=POVyrmGaVwvolMEChDwo7g==, figureFileBig=lEVmnjuKn8a19Jru+5Uk0Q==, tableContent=null), ArticleFig(id=1156967501008556834, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Table 1, caption=
Precision of the method, figureFileSmall=null, figureFileBig=null, tableContent=
| 测定次数 | 保留时间 | 咖啡因含量 (μg/mL) |
| 1 | 4.052 | 7.254 |
| 2 | 4.052 | 7.143 |
| 3 | 4.052 | 7.202 |
| 4 | 4.053 | 7.186 |
| 5 | 4.052 | 7.159 |
| 6 | 4.052 | 7.173 |
| 平均值 | 4.052 | 7.186 |
| RSD (%) | 4.052 | 0.54 |
), ArticleFig(id=1156967501058888483, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=表 1, caption=
方法的精密度, figureFileSmall=null, figureFileBig=null, tableContent=
| 测定次数 | 保留时间 | 咖啡因含量 (μg/mL) |
| 1 | 4.052 | 7.254 |
| 2 | 4.052 | 7.143 |
| 3 | 4.052 | 7.202 |
| 4 | 4.053 | 7.186 |
| 5 | 4.052 | 7.159 |
| 6 | 4.052 | 7.173 |
| 平均值 | 4.052 | 7.186 |
| RSD (%) | 4.052 | 0.54 |
), ArticleFig(id=1156967501109220132, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Table 2, caption=
Recovery rate of the method, figureFileSmall=null, figureFileBig=null, tableContent=
| 物质 | 本底值 $\left({\mu \mathrm{g}/\mathrm{{mL}}}\right)$ | 加标量 $\left({\mathrm{{\mu g}}/\mathrm{{mL}}}\right)$ | 测定值 $\left({\mu \mathrm{g}/\mathrm{{mL}}}\right)$ | 平均回收率 (% ) |
| 咖啡因 | 7.186 | 2.0 | 9.130 | 97.2 |
| 7.186 | 8.0 | 15.042 | 98.2 |
| 7.186 | 16.0 | 23.106 | 99.5 |
), ArticleFig(id=1156967501163746085, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=表 2, caption=
方法的回收率, figureFileSmall=null, figureFileBig=null, tableContent=
| 物质 | 本底值 $\left({\mu \mathrm{g}/\mathrm{{mL}}}\right)$ | 加标量 $\left({\mathrm{{\mu g}}/\mathrm{{mL}}}\right)$ | 测定值 $\left({\mu \mathrm{g}/\mathrm{{mL}}}\right)$ | 平均回收率 (% ) |
| 咖啡因 | 7.186 | 2.0 | 9.130 | 97.2 |
| 7.186 | 8.0 | 15.042 | 98.2 |
| 7.186 | 16.0 | 23.106 | 99.5 |
), ArticleFig(id=1156967501214077734, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=EN, label=Table 3, caption=
Results for caffeine in instant milk tea, figureFileSmall=null, figureFileBig=null, tableContent=
| 口味 | A 品牌 咖啡因 (mg/kg) | B 品牌 咖啡因 (mg/kg) | C 品牌 咖啡因 (mg/kg) |
| 香芋味 | 1722.41 | 924.87 | 1005.46 |
| 1683.85 | 882.06 | 968.53 |
| 1757.72 | 920.31 | 916.47 |
| 原味 | 1688.65 | 1298.44 | 1502.04 |
| 1571.77 | 1263.04 | 1488.26 |
| 1597.82 | 1243.02 | 1438.23 |
| 草莓味 | 1330.09 | 686.24 | 784.01 |
| 1211.24 | 728.46 | 826.70 |
| 1247.14 | 676.31 | 779.56 |
| 麦香味 | 935.45 | 841.66 | 909.30 |
| 878.43 | 897.30 | 877.94 |
| 890.67 | 862.77 | 931.55 |
| 咖啡味 | 1278.31 | 522.74 | 587.73 |
| 1186.47 | 484.35 | 630.55 |
| 1240.84 | 475.89 | 594.33 |
), ArticleFig(id=1156967501268603687, tenantId=1146029695717560320, journalId=1146119944283992078, articleId=1156967445866042322, language=CN, label=表 3, caption=
速溶奶茶中的咖啡因检测结果表, figureFileSmall=null, figureFileBig=null, tableContent=
| 口味 | A 品牌 咖啡因 (mg/kg) | B 品牌 咖啡因 (mg/kg) | C 品牌 咖啡因 (mg/kg) |
| 香芋味 | 1722.41 | 924.87 | 1005.46 |
| 1683.85 | 882.06 | 968.53 |
| 1757.72 | 920.31 | 916.47 |
| 原味 | 1688.65 | 1298.44 | 1502.04 |
| 1571.77 | 1263.04 | 1488.26 |
| 1597.82 | 1243.02 | 1438.23 |
| 草莓味 | 1330.09 | 686.24 | 784.01 |
| 1211.24 | 728.46 | 826.70 |
| 1247.14 | 676.31 | 779.56 |
| 麦香味 | 935.45 | 841.66 | 909.30 |
| 878.43 | 897.30 | 877.94 |
| 890.67 | 862.77 | 931.55 |
| 咖啡味 | 1278.31 | 522.74 | 587.73 |
| 1186.47 | 484.35 | 630.55 |
| 1240.84 | 475.89 | 594.33 |
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