从儿童玩具中吸入的化学物质的排放模型基于分区系数
Lihua Yu1, Xiangke He1, Cuiling Gao1
1Shandong Institute for Product Quality Inspection, Jinan 250102, China.
Journal of chromatography. A
|April 3, 2024
概括
儿童的化学物质来自儿童.
科学领域:
- 环境化学环境化学
- 室内空气质量 室内空气质量
- 消费者产品安全 产品安全
背景情况:
- 儿童玩可以将可吸入的化学物质释放到室内环境中.
- 这些空气中的化学物质对人类健康构成潜在风险,特别是对儿童来说.
- 了解玩具地毯的化学排气对于室内空气质量管理至关重要.
研究的目的:
- 测量可吸入化学物质在游乐地毯和空气之间的分配系数.
- 开发一个排放源模型,用于预测游戏的化学物质释放.
- 在通风条件下,评估长期化学物质在游戏地毯中的衰变.
主要方法:
- 使用头空间气色谱-质谱法 (HS-GC-MS) 来确定分区系数.
- 应用了质量和头空间平衡原理的保存定律.
- 建立了一个排放源模型,重点关注化学品随时间的残留比率.
主要成果:
- 计算了七种可吸入的化学物质的分割系数,由于物质的多孔性,显示了很大的值.
- 证明分区系数取决于沸点,温度,材料和污染物吸附.
- 开发的排放源模型准确地描述了游戏的化学衰变.
结论:
- 儿童玩具可以充当吸收有机污染物的重要储.
- 排放源模型提供了一个工具,用于预测化学脱气和衰变速率.
- 经过八天的通风空间后,游戏地毯中的残留化学物质含量低于15%.
相关概念视频
01:14Extraction: Partition and Distribution Coefficients
2.4K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
For extracting a solute from an aqueous phase into an...
2.4K
01:12Two-Compartment Open Model: Extravascular Administration
182
The two-compartment model for extravascular administration represents a drug's absorption and distribution process. It features a central compartment, where the drug is first absorbed, and a peripheral compartment, which illustrates the drug's distribution throughout the body. The rate of change in drug concentration in the central compartment is calculated by three exponents: absorption, distribution, and elimination.
The absorption exponent (ka) indicates the speed at which the drug...
The absorption exponent (ka) indicates the speed at which the drug...
182