当前位置：
X-MOL 学术
›
Anal. Methods
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Trace arsenic analysis in edible seaweeds by miniature in situ dielectric barrier discharge microplasma optical emission spectrometry based on gas phase enrichment
Analytical Methods ( IF 2.7 ) Pub Date : 2021-07-28 , DOI: 10.1039/d1ay01034d Yaru Zhang 1, 2 , Xuefei Mao 2 , Di Tian 1 , Jixin Liu 2, 3 , Chunsheng Li 1
Analytical Methods ( IF 2.7 ) Pub Date : 2021-07-28 , DOI: 10.1039/d1ay01034d Yaru Zhang 1, 2 , Xuefei Mao 2 , Di Tian 1 , Jixin Liu 2, 3 , Chunsheng Li 1
Affiliation
|
In this work, a novel method using low-cost miniaturized hydride generation optical emission spectrometry equipment coupled with an in situ dielectric barrier discharge trap (HG-in situ DBD trap-OES) was established for the determination of As in edible seaweed samples. An improved peak volume algorithm, where the start time point and end time point of the spectrum at each concentration are determined according to the unified judgment criteria, was first proposed to extend the linear range from 1–100 μg L−1 to 1–200 μg L−1, and increase the sensitivity by about 30%. In addition, a modification was done on the DBD implementation, providing an enhancement of sensitivity by a factor of about 4 for As. All in all the detection limit (LOD) was improved from 0.5 μg L−1 to 0.2 μg L−1. By applying the method to seaweed samples, a method detection limit (MD) of 0.25 mg kg−1 was achieved, with less than 3% relative standard deviations (RSDs). The calibration linearity reached R2 > 0.990 in the 1.25–250 mg kg−1 range. Results obtained by the proposed method showed good agreement with that of certified reference materials (CRMs), and spiked recoveries were 103% to 114%, indicating favorable accuracy. The proposed method is attractive in terms of instrumentation size (0.6 m × 0.5 m × 0.3 m), power consumption (<60 W), manufacturing cost, and gas consumption (300 measurements for 4 L compressed Ar/H2 gas), and therefore more advantageous than conventional atomic spectrometric methods.
中文翻译：
基于气相富集的微型原位介质阻挡放电微等离子体发射光谱法分析食用海藻中的痕量砷
在这项工作中，建立了一种使用低成本小型化氢化物发生发射光谱仪结合原位介质阻挡放电阱（HG-原位DBD 阱-OES）测定食用海藻样品中砷的新方法。首次提出了一种改进的峰体积算法，根据统一的判断标准确定各浓度谱图的起始时间点和结束时间点，将线性范围从1-100 μg L -1扩展到1-200微克 L -1，并将灵敏度提高约 30%。此外，对 DBD 实施进行了修改，将 As 的灵敏度提高了大约 4 倍。总之，检测限(LOD)从0.5 μg L -1提高到0.2 μg L -1。通过将该方法应用于海藻样品，方法检测限 (MD) 为 0.25 mg kg -1，相对标准偏差 (RSD) 小于 3%。校准线性在 1.25–250 mg kg -1 中达到R 2 > 0.990范围。建议方法获得的结果与有证标准物质 (CRM) 的结果非常吻合，加标回收率为 103% 至 114%，表明准确度良好。所提出的方法在仪器尺寸（0.6 m × 0.5 m × 0.3 m）、功耗（<60 W）、制造成本和气体消耗（4 L 压缩 Ar/H 2气体的300 次测量）方面具有吸引力，并且因此比传统的原子光谱方法更有优势。
更新日期：2021-08-24
中文翻译：
基于气相富集的微型原位介质阻挡放电微等离子体发射光谱法分析食用海藻中的痕量砷
在这项工作中，建立了一种使用低成本小型化氢化物发生发射光谱仪结合原位介质阻挡放电阱（HG-原位DBD 阱-OES）测定食用海藻样品中砷的新方法。首次提出了一种改进的峰体积算法，根据统一的判断标准确定各浓度谱图的起始时间点和结束时间点，将线性范围从1-100 μg L -1扩展到1-200微克 L -1，并将灵敏度提高约 30%。此外，对 DBD 实施进行了修改，将 As 的灵敏度提高了大约 4 倍。总之，检测限(LOD)从0.5 μg L -1提高到0.2 μg L -1。通过将该方法应用于海藻样品，方法检测限 (MD) 为 0.25 mg kg -1，相对标准偏差 (RSD) 小于 3%。校准线性在 1.25–250 mg kg -1 中达到R 2 > 0.990范围。建议方法获得的结果与有证标准物质 (CRM) 的结果非常吻合，加标回收率为 103% 至 114%，表明准确度良好。所提出的方法在仪器尺寸（0.6 m × 0.5 m × 0.3 m）、功耗（<60 W）、制造成本和气体消耗（4 L 压缩 Ar/H 2气体的300 次测量）方面具有吸引力，并且因此比传统的原子光谱方法更有优势。
京公网安备 11010802027423号