共查询到18条相似文献,搜索用时 78 毫秒
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等离子体光谱法同时测定羟基磷灰石中的As、Hg方法研究胡明芬童式国(四川大学分析测试中心成都610064)关键词砷汞等离子体光谱法氢化物发生羟基磷灰石[Ca5(PO4)3(OH),简称HA]是一种优良的生物活性材料,在医学上主要是制备各种人工骨制品,... 相似文献
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化妆品中Hg、As和Pb的微波消解—氢化物发生ICP—AES法测定 总被引:6,自引:0,他引:6
采用微波消解-氢化物发生ICP-AES法测定化妆品中Hg、As和Pb,加入L-半胱氨酸消除了过渡金属离子的干扰,考察了微波消解、氢化物发生的最佳条件。建立的方法简便快速,测定Hg、As和Pb的RSD分别为0.59%、1.2%、2.4%(n=10),样品加标回收率分别为98.5%、99.3%和100.1%。该法已应用于化妆品的常规测定,得到满意的结果。 相似文献
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化妆品中Hg、As和Pb的微波消解- 总被引:5,自引:0,他引:5
采用微波消解 -氢化物发生ICP-AES法测定化妆品中的Hg、As和Pb ,加入L_半胱氨酸消除了过渡金属离子的干扰 ,考察了微波消解、氢化物发生的最佳条件。建立的方法简便快速 ,测定Hg、As和Pb的RSD分别为0.59%、1.2%、2.4 % (n=10) ,样品加标回收率分别为98.5%、99.3 %和100.1 %。该法已应用于化妆品的常规测定 ,得到满意的结果。 相似文献
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ICP-AES法同时测定化妆品中的Hg、As、Pb 总被引:4,自引:0,他引:4
采用高压溶样弹,将样品用硝酸-过氧化氢或高氯酸-过氧化氢溶解后,用ICP-AES法对汞砷铅连续测定。方法的回收率分别为86.0%、96.2%、99.8%,变异系数分别为3.17%、2.51%、2.01%。与原子吸收法比较,无显著差异。应用于市售化妆品检测,结果满意。 相似文献
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Ion exchange (IE)-vapor generation (VG)-inductively coupled plasma (ICP)-mass spectrometry (MS) method has been employed to simultaneously determine trace amounts of As, Se, and Hg in acidic conditions. Before hydride generation, anion-exchange column was used to separate the analytes from the matrix. Effects of sample solution acidity, eluant conditions and concentrating time were investigated and optimized. The method sensitivity was improved, as well as the ability to refrain interference caused by chloride, mental ions and other hydride-forming elements compared with (CF)VG-ICP-MS method. Limits of detection (3σ, n = 10) for As, Se, and Hg were As, 0.0021 ng/ml; Se, 0.0022 ng/ml; Hg, 0.0007 ng/ml, respectively; and recovery values for interference experiments were between 95.6 and 100.3%. The developed method was applied to four standard biological and geological materials, and the determined results of As, Se, and Hg were consistent with the certified values. 相似文献
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唐荣明 《广东微量元素科学》2012,(6):52-57
为建立氢化物发生-原子荧光光度法同时测定铅锌原矿(主要是硫化物)、铅精矿、锌精矿中的砷、锑、汞含量的方法,探讨了试样的消解、仪器工作参数以及载流量屏蔽气流量KBH4的含量等的优化选择,作了单测与同测以及国家标准物质的对比试验,结果表明,砷、锑、汞的平均回收率分别为92.2%、104.3%、102.6%;RSD(n:6)平均值分别为1.08%、1.2%、3.4%。 相似文献
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建立了连续测定化探样品中微量砷、锑、铋、汞、硒、碲的原子荧光光谱法。研究了酸度、KBH4溶液浓度、基体改进剂等条件对荧光强度的影响。在优化的实验条件下,砷、锑、铋、汞、硒、碲的检出限分别为0.011,0.006,0.020,0.002 5,0.005,0.002 mg/L,测定结果的相对标准偏差分别为1.30%,4.64%,3.76%,5.46%,2.04%,3.41%(n=11),准确度大于98%。该方法简便,成本低,检测结果准确,检出限、准确度及精密度均能达到行业规范要求,可用于化探样品中微量元素测试。 相似文献
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原子荧光光谱法测定水中的痕量砷、硒、汞 总被引:5,自引:0,他引:5
建立了测定水中痕量砷、硒、汞三种元素的原子荧光光谱法。利用AFS-230型双道原子荧光光度计可双道分析的特点,采用氢化物发生原子荧光光谱法联合测定砷、硒,采用冷原子荧光光谱法单独测定汞。As、Se、Hg的线性相关系数分别为:0.9994、0.9995、0.9994,检出限分别为1.60、0.89、0.029μg/L,测定结果的相对标准偏差分别为3.8%、5.7%、4.6%,平均加标回收率分别为100.1%、101.4%、99.6%。 相似文献
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通过对化探样品进行王水密闭溶解,饱和的硫脲-抗坏血酸预还原,运用氢化物发生-原子荧光光谱法实现了地质样品中As、Sb、Bi、Hg元素的任意配对以及连续快速测定。实验确定了原子化器高度为14mm,最佳溶样时间为1h。在优化条件下,结果显示还原剂(硫脲-抗坏血酸)对Hg、Bi测定结果无影响,且Hg、Bi测定结果在预还原20min至48h内都很稳定,测定结果良好,Cu、Co、Ni、Au、Ag、Cd、As、Sb、Bi、Se、Ge等金属离子对预还原测定汞均无干扰,对比实验表明还原剂体系下汞荧光强度值基本不变。方法的检出限低、精密度好、准确度高、操作简便,有效避免了元素污染问题,可满足大批量地质样品分析测定的需要。 相似文献
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A new and sample technique for the simultaneous determination of trace arsenic, antimony, bismuth and selenium in biologic samples by hydride generation-four-channel nondispersive atomic fluorescence spectrometry was development. The conditions of instrumentation and hydride generation of arsenic, antimony, bismuth and selenium were optimized. For reducing hexavalent Se to the tetravalent state was to heat the sample with 6 mol l−1 HCl, and then pre-reducing pentavalent As and Sb to the trivalent state was achieved by the addition of 0.05 mol l−1 thiourea. The interferences of coexisting ions were evaluated. Under optimal conditions, the detection limits for As, Sb, Bi and Se were determined to be 0.03, 0.04, 0.04 and 0.03 ng ml−1, respectively. The precision for seven replicate determinations at the 5 ng ml−1 of As, Sb, Bi and Se were 0.9, 1.2, 1.3 and 1.5% (R.S.D.), respectively. The proposed method was successfully applied to the simultaneous determination of As, Sb, Bi and Se in a series of Chinese certified biological reference materials using simple aqueous standard calibration technique, the results obtained are in good agreement with the certified values. 相似文献