Alkyl mercury determination - Teflon PFA distillation flask 50ml with 1/8 connecting tube

Alkyl mercury determination - Teflon PFA distillation flask 50ml with 1/8 connecting tube

The content of methylmercury in natural water bodies is very lowHowever, the special biological toxicity of methylmercury makes it highly valued in the study of biogeochemical cycling of mercury in water bodies. Currently, in China, benzene extraction GC-AAS method, extraction liquid chromatography method, mercapto cotton enrichment gas chromatography electron capture method B-7, and mercapto cotton enrichment cold atomic fluorescence method (8) are commonly used to determine methylmercury in natural water bodies. However, these analytical methods have problems such as large sample size, low sensitivity, poor selectivity, or chromatographic column reaction. Therefore, it is necessary to establish an accurate, sensitive, and easy to operate analytical method for methylmercury in natural water bodies.

Distillation of methylmercury in water samples

The purpose of distilling water samples is to eliminate matrix interference during distillation The distillation device is a two-way connected systemTeflonDistillation bottle(picture1).By heating the distillation flask(Control the temperature to145C)Allow methylmercury in the gas phase to enter the receiving bottle with nitrogen gas(Ice bath cooling)The specific operation is as follows：

取45.0mLMix the acidified water sample evenly until60mLThe polytetrafluoroethylene distillation bottle is sealed tightly and received in the bottle5.0mLultrapure water,The ventilation flow rate is60+20mL/min.When the water sample is steamed out80%~85%Immediately remove the receiving bottle and place the distilled liquid in the dark at room temperature,in48hInternal measurement.

Product Name: PFA Distillation Bottle

Specification: 60ml

货号： RNKW-PFAZLP-60ml

Brand: Nanjing Ruinike

Product Features

1. Transparent appearance, smooth inner wall, no water hanging, easy to clean;

2. High and low temperature resistance: operating temperature -200~+260 ℃ (not exceeding 150 ℃ under sealed conditions);

3. Threaded mouth, excellent sealing, no air leakage;

4Pollution prevention: low blank value of metal elements;

Alkyl mercury determination - Teflon PFA distillation flask 50ml with 1/8 connecting tube

heating device

The graphite digestion apparatus is a representative porous digestion device that uses graphite blocks as a thermal conductive medium. It uses a surround heating method to heat the sample, effectively increasing the utilization rate of thermal energy. At the same time, it occupies the forefront of conventional digestion equipment with higher temperature control accuracy, small differences between pores, efficient digestion, energy saving, and environmental protection advantages.

2、 Application Fields

Suitable for digestion and treatment of soil, atmosphere, feed, plants, seeds, ores, biological tissues and other samples in industries such as food, medicine, agriculture, forestry, environment, disease control, chemical engineering, biochemistry, as well as in higher education institutions and research departments.

3、 Parameter Description