相关实验视频

Updated: May 6, 2026

Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

Published on: August 26, 2016

开发用于测量土壤中 perfluorooctanoic 酸和 perfluorooctane 硫酸盐度的认证参考材料

Yuzhi Xuan¹, Zhihao Zheng¹, Menghuan Zhang¹

¹Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China.

|May 20, 2025

概括

现在可以在土壤中获得对 perfluorooctanoic acid (PFOA) 和 perfluorooctane sulfonate (PFOS) 的新认证参考材料 (CRM). 这些CRM可确保对这些持久有机污染物进行准确的环境监测和质量控制.

科学领域:

环境化学环境化学
分析化学分析化学
材料科学材料科学材料科学

背景情况:

perfluorooctanoic 酸 (PFOA) 和 perfluorooctane 硫酸盐 (PFOS) 是持久性有机污染物,广泛存在于环境中.
在土壤等环境矩阵中精确量化PFOA和PFOS对于风险评估和修复工作至关重要.
开发可靠的认证参考材料 (CRM) 对于验证分析方法和确保数据质量至关重要.

研究的目的:

开发和认证用于准确测量土壤中PFOA和PFOS度的参考材料.
优化样品预处理方法,提高土壤分析的准确性和实用性.
在土壤CRM中建立可追溯和可靠的PFOA和PFOS值.

主要方法:

从被化物污染的地点收集和处理三种不同的土壤候选CRM.
优化样品预处理因素,包括颗粒大小,提取试剂,pH值和平衡时间.
使用同位素稀释液体染色学-并列质谱法 (ID-LC-MS/MS) 进行表征,同质性和稳定性评估.
一项涉及11个参与实验室的实验室间比较研究.

主要成果:

在开发的土壤CRM中为PFOA和PFOS建立了具有扩展不确定性的认证值.
PFOA认证的值为:0.82 ± 0.13μg/kg (ESF1) 和6.5 ± 0.8μg/kg (ESF3).这些值在每种情况下均为0.82 ± 0.13μg/kg.
PFOS认证的值是2.4 ± 0.4 μg/kg (ESF1),17 ± 2 μg/kg (ESF2) 和85 ± 8 μg/kg (ESF3).这些值可以被测定为2 ± 0.4 μg/kg.

结论:

开发的土壤CRM为PFOA和PFOS量化提供了可靠的标准.
这些CRM适用于环境监测计划中的质量控制.
该研究展示了环境分析中CRM开发的强有力的方法.

关键词:

经过认证的参考材料.一致性一致性 perfluorooctane 硫酸盐的使用情况 perfluorooctanoic 酸的含量是多少稳定性评估稳定性评估稳定性评估不确定性评估不确定性评估

更多相关视频

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

相关概念视频

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...