AJ-2200 belongs to a semi-automatic gas-phase molecular absorption spectrometer.

Key Features

1. Adopting a peristaltic pump for rapid quantitative injection of samples and reagents through self suction;

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

3. Determine nitrate nitrogen and total nitrogen using a built-in constant temperature online heating device to provide the required temperature of the reaction solution in a timely manner;

4. The sample size and chemical reagents used are 1/10 of the so-called flow injection injection injection volume for similar instruments;

5. The time from injection to measurement of results to determination of the next sample is ≤ 50s. Compared with the so-called flow injection injection injection method of similar instruments, which takes 3-5 minutes, the measurement speed is increased by 5-10 times.

technical indicators

1. Stability: 30min zero baseline drift ≤± 0.0001Abs, continuous stable working time greater than 12 hours;

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

3. Detection limit: lower than the HJ/T195-200 (2005) method standard, and the measured indicators are better than AJ-2100;

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.