WANG Qi,LI Huiming,ZHANG Peng,et al.Continuous Flow Spectrophotometry for Determination of Cyanide in Farmland Soil[J].HEILONGJIANG AGRICULTURAL SCIENCES,2024,(02):64-69.[doi:10.11942/j.issn1002-2767.2024.02.0064]
连续流动分光光度法测定农田土壤氰化物
- Title:
- Continuous Flow Spectrophotometry for Determination of Cyanide in Farmland Soil
- 文章编号:
- 11
- Keywords:
- farmland soil; cyanide; continuous flow spectrophotometry
- 文献标志码:
- A
- 摘要:
- 为了监测土壤中日趋严重的氰化物污染，应对日益增多的监测任务和大批量监测样品，通过连续流动分光光度法对实际土壤样品及有证标准样品分析，对该方法的检出限、准确度和加标回收率等进行实际测定，针对该方法探究出合适的试验条件和仪器参数，并与传统分光光度法结果进行对比。结果表明，连续流动分光光度法测得的实际样品中氰化物结果与分光光度法无显著差异，并且通过实验室空白的多次平行测定，测得检出限为0.01 mg·kg-1，检出下限为0.04 mg·kg-1；对高中低3种不同浓度的有证标准样品进行分析，测得标准偏差在1.437%～8.789%，相对标准偏差在0.283%～1.520%；对实际土壤样品的加标回收试验，回收率在94.2%～105.0%。该方法精密度和准确度高，检出限更小，准确度试验中具有较高的稳定性和重现性，回收率良好，与分光光度法相比，试验结果偏差较小；并且由于其全自动的进样及测试过程，能够在短时间内监测大批量样品，分析效率高，自动化程度高，在实际应用上具有广泛的前景。
- Abstract:
- In order to monitor the increasing cyanide contamination in soil, and in response to the increasing monitoring tasks and the large number of monitoring samples, the actual soil samples and certified reference samples were analyzed by continuous flow spectrophotometry. The detection limit, accuracy and recoveries of the method were measured, and suitable experimental conditions and instrument parameters were found. The results were compared with those of traditional spectrophotometer， showed that the actual samples measured by the continuous flow spectrophotometry were not much different from the spectrophotometer ones, and the detection limit was 0.01 mg·kg-1 by multiple parallel measurements in a blank laboratory, the detection limit was 0.04 mg·kg-1, and the standard deviation and relative standard deviation were 1.437%-8.789% and 0.283%-1.520%, respectively. The recoveries of soil samples were from 94.2% to 105.0%. The results of the study on continuous flow spectrophotometry for the determination of cyanide in farmland soils showed that the method was of high precision and accuracy with lower detection limits and higher stability and reproducibility in accuracy experiments, because of its automatic sampling and testing process, it can monitor a large number of samples in a short time, and the analysis efficiency is high and the degree of automation is spectrophotometer, it has a broad prospect in practical application.
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备注/Memo
收稿日期：2023-10-20