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《化学试剂》2021,43(7):930-935
通过4种典型前处理方案对化妆品中的重金属样品进行消解:1)通过加硝酸和过氧化氢,静置过夜后在沸水浴中加热2 h,使化妆品中重金属被消解(国标前处理);2)通过向样品中加入硝酸后在超声波作用下对化妆品样品进行快速消解;3)通过向样品中加入硝酸和过氧化氢后在超声波作用下对化妆品样品进行快速消解;4)通过在样品中加入王水、EDTA与离子液体在超声波作用下对化妆品样品进行快速消解。分别从准确度、消耗时间、回收率、精密度这4个指标着手,评价不同前处理方案效果。结果显示,采用超声辅助王水、离子液体消解法进行化妆品样品前处理时消耗的时间最短、回收率最高、精密度最好,是可用于快速检测防晒霜中铅含量测定的理想前处理方案。 相似文献
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为了掌握化学防晒剂在市售化妆品中的添加情况及标签标识的真实性,以甘肃省27个市、州、县地区市售的194批防晒类化妆品为研究对象,基于《化妆品安全技术规范》(2015年版)的检测方法为依据,对样品中苯基苯并咪唑磺酸等15种化学防晒剂进行检测。结果表明:产自广东省、上海市和进口的样品较多,未出现超限量违规添加情况;甲氧基肉桂酸乙基己酯和水杨酸乙基己酯使用频率较高;单批样品检出3种或3种以上防晒剂的样品有169批,占比为87.1%。问题样品共10批,主要是检测结果与实际标识成分不符。建议继续加强对防晒类化妆品的质量监控,为国民营造更加安全的用妆环境。 相似文献
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使用手持拉曼光谱对于化妆品内容物在830 nm处进行扫描识别,利用化学计量学手段,通过聚类分析鉴别化妆品不同版本,基于一致性检验法建立相关仿冒高风险化妆品模型和数据库。结果表明,手持拉曼光谱对于不同基质化妆品内容物响应良好,聚类分析能够有效识别不同版本化妆品,一致性检验法建立模型阴性、阳性汇报率良好,能够有效识别真伪品,40批实际样品检测,伪品检出率5%。手持拉曼光谱仪可以快捷高效鉴别化妆品真伪品,所建模型和数据库为一线执法初筛将带来可靠帮助。 相似文献
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Norman Tanner Birgit Lichtenberg‐Kraag 《European Journal of Lipid Science and Technology》2019,121(12)
Marketing of adulterated beeswax foundation has recently become a major economic problem for beekeepers. Paraffin contamination leads to collapse of combs, and stearic acid has a negative influence on the development of bee brood. The quality of beeswax for beekeeping has not been standardized in EU regulations. Recently, it was shown that attenuated total reflectance Fourier‐transform infrared spectroscopy (FTIR‐ATR) can be used to determine beeswax adulteration. Differences in the IR spectra of authentic beeswax can be identified and calculated through comparison with authentic beeswax. In this study, the method is further validated by employing a high number of samples of authentic beeswax from different origins. Low quantification and detection limits are achieved for paraffin, stearic acid, tallow, carnauba wax, and candelilla wax. Furthermore, the FTIR‐ATR analytical conditions are verified by analyzing 358 samples of commercial and beekeeper‐produced beeswax foundations. Multi‐adulterated samples with as many as five different additives in beeswax mixtures are identified with the same accuracy as single substances. Additionally, the spectra of a further 14 different natural and synthetic waxes and hardened fats are analyzed and are compared with beeswax. Finally, a spectral library is established that can be used for further studies. Practical Applications: FTIR‐ATR is a fast and cost‐efficient tool in beeswax analysis for accurately monitoring a high sample volume. Analysis of 358 beeswax foundations showed an adulteration of 21.8% of the samples with paraffin, stearic acid, tallow, and combinations. Based on the results of this study, it is possible to detect beeswax adulteration of less than 3% of these adulterants and their combinations by FTIR‐ATR spectroscopy. This method can be used for monitoring beeswax foundations to identify adulterated materials, exclude these materials from the recycling process, and produce high‐quality beeswax, which is essential for bee health. 相似文献
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采用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)、免疫印迹法(WB)和噻唑蓝(MTT)比色法对化妆品中表皮生长因子(EGF)进行快速检测。得到SDS-PAGE和WB的检出限分别为0.500 mg/L和0.005 mg/L;样品1中EGF质量浓度约为2 mg/L,样品2中EGF质量分数约为10μg/g;MTT检测样品1和样品2中EGF的活性分别为1.14×104IU/mL和1.97×105IU/g。结果表明,采用SDS-PAGE、WB、MTT比色法快速检测化妆品中的EGF可行,可为建立EGF类化妆品的质量标准提供实验依据。 相似文献
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采用原位采样离子化及离子迁移谱技术,建立了化妆品中5种禁用香豆素类化合物的现场快速筛查方法。化妆品样品无需前处理,水剂类、唇膏类及散粉类化妆品样品直接滴加或涂抹于Grade 3MM型色谱纸上,滴加萃取溶剂,采用纸喷雾方式进行分析检测;乳液类、膏霜类及香波类化妆品样品经金属微电极直接蘸取,插入已充注萃取溶剂的玻璃毛细管内,采用萃取纳升喷雾方式进行分析检测。结果表明,5种香豆素类化合物的检出限为1~2.25 mg/kg,离子迁移分析时间均小于13 ms,单个样品的检测时间不超过30 s。对于疑似阳性样品,进一步采用超高效液相色谱-串联质谱法进行确证分析。 相似文献
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研究控制图在化妆品pH值检测质量控制中的应用。以有证pH标准物质为控制样品,按照《化妆品安全技术规范》(2015版)中pH值直测法进行实验,在日常检测过程中插入控制样品,将测试结果经统计分析后绘制成均值图和极差图。结果表明,本实验室化妆品pH值的检测方法受控,控制图可及时有效地反映检测过程中的异常波动及质量控制情况,根据控制图特点实验室可采取相应措施,确保检测结果的准确性和可靠性。 相似文献