This instrument is a classic economical instrument of our company. Since its launch in 2001, it has been designated by the Ministry of Environmental Protection as a validation instrument for the development of HJ/T195-200 (2005) standard methods, providing all validation data.

Key Features

1. Hollow cathode lamp as the light source, dual lamp power supply pulse power supply, one lamp working, other lamps preheating standby;

2. The host is equipped with an air pump, providing stable and invaluable purified air as the carrier gas;

3. Adopting the optimal 1nm spectral passband, with strong light energy, high sensitivity, and no faults at all;

4. Sampling → measuring results → measuring the next sample takes ≤ 60s;

5. Various gas-liquid separation devices such as piston type (patented) are used to determine various water samples, especially suitable for the determination of turbid water samples such as sulfides. It can also directly measure solid samples such as soil, fertilizers, marine sedimentary rocks, cement, etc.

This instrument can fully demonstrate the unique performance of gas-phase molecular absorption spectroscopy in resisting interference from turbid substances.

technical indicators

1. Stability: 30min zero baseline drift ≤± 0.0001Abs, continuous stable working time greater than 8 hours;

2. Signal to noise ratio: zero baseline noise ≤± 0.0002Abs;

3. Detection limit: lower than the HJ/T195-200 (2005) method standard, the measured detection limit is as follows:

Ammonia nitrogen 0.005mg/L, nitrate nitrogen 0.003mg/L, nitrite nitrogen 0.001mg/L, total nitrogen 0.010mg/L

Kjeldahl nitrogen 0.01mg/L, sulfide 0.002mg/L, mercury 0.001/L maximum;

4. Calibration curve correlation: r>0.999;

5. Accuracy: ≤± 2%;

6. Repeatability: RSD (n=6) ≤ 2%;

7. Measurement range: 0.01~500mg/L.