μL) in a kerosene stream, where it is dispersed by means of a packed mixing reactor and carried to an atomic absorption spectrometer which is used as detector. Zinc was used as model analyte. Two different systems were evaluated, one for low concentrations (range 0–10 ppm) and the second capable of providing higher dilution rates for high concentrations (range 0.02%–0.2% w/w). The sampling frequency was about 30 samples/h. Calibration curves fitted a second-degree regression model (r2 = 0.996). Commercial samples with high and low zinc levels were analysed by the proposed method and the results were compared with those obtained with the standard ASTM method. The t test for mean values showed no significant differences at the 95% confidence level. Precision (RSD%) was better than 5% (2% typical) for the high concentrations system. The carryover between successive injections was found to be negligible."> 流动注射-火焰原子吸收光谱法测定润滑油中的锌基添加剂 - raybet雷竞app,雷竞技官网下载,雷电竞下载苹果

化学分析方法杂志

PDF
化学分析方法杂志/2005/文章

开放存取

体积 2005 |物品ID 981608 | https://doi.org/10.1155/JAMMC.2005.1

Gustavo Pignalosa、Moisés Knochen、Noel Cabrera, "流动注射-火焰原子吸收光谱法测定润滑油中的锌基添加剂",化学分析方法杂志, 卷。2005, 物品ID981608, 7. , 2005. https://doi.org/10.1155/JAMMC.2005.1

流动注射-火焰原子吸收光谱法测定润滑油中的锌基添加剂

收到 2004年8月10日
认可的 2004年8月24日

摘要

提出了一种用于测定润滑油中金属基添加剂的流动注射系统。该系统在计算机控制下运行,使用电动注射器测量和注入油样(200 μ 五十) 在煤油流中,通过填充混合反应器将其分散,并将其输送至用作检测器的原子吸收光谱仪。锌被用作模型分析物。评估了两个不同的系统,一个用于低浓度(范围0–10 ppm)第二个能够为高浓度(范围为0.02%–0.2%w/w)提供更高的稀释率。采样频率约为30个样本/h。校准曲线符合二次回归模型( R 2. = 0.996). 用该方法分析了锌含量高和低的商业样品,并将结果与标准ASTM方法所得结果进行了比较。这个 T 平均值测试表明,在95%置信水平下无显著差异。对于高浓度系统,精密度(RSD%)优于5%(2%典型值)。发现连续注射之间的夹带可忽略不计。

版权所有©2005 Hindawi Publishing Corporation。这是根据知识共享署名许可协议,允许在任何媒介中不受限制地使用、分发和复制,前提是原作被正确引用。


更多相关文章

PDF 下载引文 引用
订购印刷品顺序
意见216
下载2954
引证

年度文章奖:2020年杰出研究贡献,由我们的主编评选。阅读获奖文章.