土壤中顺式-1,2-二氯乙烯检测数据
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随着城市化和工业化进程的加快，城市和工业区附近的土壤有机污染日益加剧，有机污染物在工业区周围的土壤中超过国家标准多倍。通过检测土壤中顺式-1,2-二氯乙烯浓度，可以了解当地土壤环境是否已造成严重污染，从而为监管部门开展农产品安全监管提供科学证据。1、数据来源：按照土壤和沉积物 挥发性有机物的测定 吹扫捕集/气相色谱-质谱法 HJ 605-2011对土壤进行土样采集检测。2、算法规则：按照如下公式进行计算：样品浓度=（样品查曲线值W-空白查曲线值）*定容体积V*稀释倍数D/取样量m/(1-（1-干物质含量w）/100)，公式中样品浓度单位为μg/kg；样品查曲线值及空白查曲线值单位为μg/L；定容体积单位为mL；取样量单位为g，干物质含量单位为%。3、数据判定：根据《建设用地土壤污染风险管控标准（试行）》（GB36600-2018）第一类用地风险筛选值进行判定，若顺式-1,2-二氯乙烯浓度数据≤66mg/kg，则判定土壤中该指标浓度达标，反之则超标。4、数据应用：通过分析土壤中顺式-1,2-二氯乙烯的浓度，我们可以判断该土壤中顺式-1,2-二氯乙烯的达标情况，避免因该指标浓度含量高引起土壤的污染问题，为监管提供依据。
Against the backdrop of accelerating urbanization and industrialization, soil organic contamination in urban and industrial vicinities has intensified progressively, with organic pollutants in soils surrounding industrial zones exceeding national standards by multiple folds. Detecting the concentration of cis-1,2-dichloroethylene in soil enables assessment of whether local soil environments have suffered severe contamination, thereby providing scientific evidence for regulatory authorities to implement agricultural product safety supervision. 1. Data Source: Soil sampling and testing were conducted in strict accordance with HJ 605-2011 *Determination of Volatile Organic Compounds in Soils and Sediments by Purge and Trap/Gas Chromatography-Mass Spectrometry*. 2. Algorithm Rules: The sample concentration is calculated using the following formula: Sample Concentration = (Sample Calibration Curve Value W - Blank Calibration Curve Value) × Final Volume V × Dilution Factor D / Sample Mass m / [1 - (1 - Dry Matter Content w)/100] Where the unit of sample concentration is μg/kg; the units of sample calibration curve value and blank calibration curve value are μg/L; the unit of final volume is mL; the unit of sample mass is g; and the unit of dry matter content is %. 3. Data Judgment: Assessments are made based on the risk screening values for first-type construction land stipulated in the *Standard for Risk Management of Soil Contamination in Construction Land (Trial Implementation)* (GB 36600-2018). If the concentration of cis-1,2-dichloroethylene is ≤ 66 mg/kg, the concentration of this indicator in the soil is deemed compliant; otherwise, it is determined to be non-compliant. 4. Data Application: By analyzing the concentration of cis-1,2-dichloroethylene in soil, the compliance of this indicator in the soil can be evaluated, potential soil contamination caused by excessive concentrations of this indicator can be prevented, and a scientific basis can be provided for regulatory decision-making.
