HNJKG-205 Cold Atomic Absorption Mercury Analyzer

According to the standard:
Method for determination of mercury in coal in accordance with standard GB/T 16659-2008
GB/T16659-2008 Water quality - Determination of total mercury - Cold atomic absorption spectrophotometric method
Main purpose:
Mainly used for the determination of mercury content in water bodies, solid and gas samples need to be chemically extracted, digested, absorbed, and processed into aqueous solutions for measurement.
Measurement principle:
Based on the fact that elemental mercury can evaporate into mercury vapor at room temperature without heating, it has a strong absorption effect on ultraviolet light with a wavelength of 253.7nm. Within this range, the concentration of mercury is proportional to the absorption value, which conforms to Beer's law. Using the principle of cold atomic absorption and Lambert Beer's law, an oxidized water sample is added to a boiling flask, a core is inserted, and stannous chloride is added at the upper inlet of the core to reduce mercury ions in the water sample to elemental mercury. The vacuum pump uses a carrier gas (such as air) to bring the mercury vapor released from the reaction between stannous chloride and water sample in the foam bottle into the colorimetric cell. The receiver receives the light signal and determines the concentration of mercury vapor based on the change in light intensity.
Key Features:
The instrument has high sensitivity, wide measurement range, and good reproducibility.
The use of chemical reagents is limited in variety and quantity; Less use of equipment and devices; Do not use inert gases.
Flipping the bottle is very simple and there is no loss of mercury during operation.
The circuit design ensures the stability and sensitivity of the instrument, with almost no baseline drift.
The measurement range is wide, and samples with concentrations ranging from 0.01 to 100 micrograms per liter can be continuously measured in the same state.
● * Easy to operate, the computer prompts the entire operation process, and intelligent data processing greatly reduces the workload of experimental personnel.
Main technical indicators:
● * Measurement range: 0-100ug/L
● * Detection limit: 0.003 ug/L
● Correlation: R>0.999 (0.01-10 ug/L)
● * Reproducibility: The measured mercury standard solution is between 0.04-100 ug/L, with a standard deviation of<3%=''>3%>
Stability: Mercury standard solution prepared with the same reagent can meet the measurement error requirements without retesting the calibration curve.
Baseline stability: 0.00005 ampere per 30 minutes
Power supply and power consumption: AC220V ± 10%, 50Hz 40VA
● Dimensions: 360 × 370 × 120mm Net weight: 8Kg