BDCFA-800 Automatic Continuous Flow Analyzer is developed and produced independently by Beijing Baode Instrument Co., Ltd. It uses the bubble interval continuous flow analysis principle (CFA) to detect total phosphorus, total nitrogen, phosphate, Nitrate nitrogen, nitrite nitrogen , Ammonia nitrogen and other projects in water samples. The integrated design of the instrument is suitable for simultaneous detection and analysis for multiple parameters and large batches of water samples.

Main features:

Ø  Adopt bubble interval continuous flow principle (CFA).

Ø  Integrated design: integrated design of automatic sampler, high-precision peristaltic pump, chemical analysis module, online pre-processing device, LED light source detector, circuit control and software workstation.

Ø Each analytical channel is equipped with its own unique polar auto-sampler. The injector has 72 sample positions, 70 10ml sample positions and 2 50ml sample positions.

Ø Double-channel current-carrying tank provides real-time fluid replenishment to avoid cross-contamination during sampling.

Ø The high-precision pump is equipped with 17 pump tube channels; an integral pump gland is used as the pump cover.

Ø Air bubbles are injected through air valve, and the bubbles are uniform in size and shape.

Ø The chemical analysis module uses a quartz reaction mixing ring, including online heating, online UV digestion, online constant temperature and other online pre-treatment devices.

Ø Each analysis channel is equipped with a high-sensitivity photodetector, with an optional optical path length of 10-50mm.

Ø Workstation software can set analysis parameters, collect data, and generate reports automatically.

Total phosphorus performance indicators:

Total phosphorus RSD（200ppb）Peak

Total phosphorus DL（20ppb）Peak

Test object (sea water)

Parameter        Analysis method

1  Total Phosphorus    Online spectrophotometry of ammonium molybdate decomposition under high pressure

2  Phosphate   Color development at constant temperature online - spectrophotometry of ammonium molybdate

3  Total Nitrogen  Online high pressure digestion and column spectrophotometry with reduction of cadmium, naphthalene and ethylenediamine hydrochloride

4  Nitrate Nitrogen   Online cadmium column reduction & constant temperature color development-naphthylethylenediamine hydrochloride spectrophotometry.

5  Nitrate Nitrogen  Online Color Development at Constant Temperature - Spectrophotometry of Naphthylethylenediamine Hydrochloride

6  Ammonia Nitrogen Online Spectrophotometry of Salicylic Acid at Constant Temperature

7  Active silicates   Online color development at constant temperature - spectrophotometry of silicon-molybdenum blue

Test object (fresh water)

Parameter       Analysis method

1  Total phosphorus  Online high-pressure digestion-ammonium molybdate spectrophotometry

2  Phosphate  Online constant temperature color development-ammonium molybdate spectrophotometry

3  Total nitrogen  Online high-pressure digestion & cadmium column reduction-naphthylethylenediamine hydrochloride spectrophotometry 

4  Nitrate nitrogen  Online cadmium column reduction & constant temperature color development-Naphthylethylenediamine hydrochloride spectrophotometry

5  Nitrate Nitrogen  Online constant temperature color development-Naphthylethylenediamine

6  Ammonia Nitrogen  Online constant temperature color development-salicylic acid spectrophotometry 

7. Volatile phenol  Online distillation-4-aminoantipyrine spectrophotometry

 8.  Cyanide  Online distillation-isonicotinic acid-barbituric acid spectrophotometry

9  Anionic surfactant  Spectrophotometric  Secondary extraction methylene blue spectrophotometry