It is primarily used for the quantitative analysis of volatile phenol, free total cyanide, anionic surfactant, sulfide, total phosphorus, total nitrogen, ammonia nitrogen, and other items in water quality samples.
1) Principle
The analytical principle is FIA (Flow Injection Analysis) or CFA/SFA (Segment Flow Analysis)Bubble Separation Method).
2) Operating Environment Requirements:
Voltage: AC220V±l0%, 50Hz
Temperature: Indoor ambient temperature to 40℃;
Humidity: ≤90%, no condensation
3) Technical Specifications:
Automatic Sampler:
It must be capable of automatically controlling the sample injection volume.
It can accommodate up to 180 sample tubes and more than 10 standard samples.
Immersed flow cleaning with high-precision X/Y/Z direction control.
High-precision peristaltic pump:
It can accommodate no less than 32 reagent pipelines, none of which are used for air passage.
If it is FIA: none of the pipelines are used for air bubble passage; it should be programmable or manually variable speed, and if it is SFA: air bubble injection should be through a photoelectric sensor to ensure the best repeatability and minimal relative deviation, and the pump speed can be adjusted and controlled through computer software.
Chemical analysis module:
All pipelines must be made of materials that are not easily broken or blocked, and should be easily replaceable, dismountable, and transportable by the user, suitable for on-site detection in emergency vehicles or research vessels.
The number of chemical analysis modules is required to be ≥7, independently configured for online volatile phenol, online total cyanide, online free total cyanide, online anionic surfactant, online sulfide, online total phosphorus, online total nitrogen, and online ammonia nitrogen.
Detector:
Equipped with 7 independent detectors.
Fiber-optic dual-beam detector, 24-bit A/D converter capable of providing a dynamic range of not less than three orders of magnitude, compact design to effectively utilize the space of the laboratory bench, noise (in the absence of water): 0.00008AU.
Reproducibility: RSD<3%
Channels: At least 5 channels, each capable of independent detection without method conversion. Different method modules can be installed on the same channel.
4) System composition:
Main unit: At least 5 channels, each capable of independent detection without method conversion.
Random automatic sampler, capable of automatically controlling the sample size and accommodating 180 sample tubes at a time.
Two sets of high-precision peristaltic pumps: 16 tube positions, including 16 reagent pipelines, none of which is used for air bubbles; high precision, programmable or manually variable speed.
No fewer than 6 chemical analysis modules, ensuring the determination of pollutant content such as volatile phenols, total cyanide, anionic surfactants, sulfides, total phosphorus, total nitrogen, ammonia nitrogen, etc. in water.
A set of original data processing system
A set of branded computers and printers
5) Technical requirements for test items
Volatile phenols:
Analysis method: 4-aminoantipyrine spectrophotometry
Measurement range: 2-200ug/L
Detection limit: ≤0.3ug/L
Anionic surfactant:
Analysis method: Methylene blue spectrophotometry
Measurement range: 0.025 – 1.0 mg/L as LAS
Detection limit: ≤0.002 mg/L
Cyanide and total cyanide:
Analysis method: Isonicotinic acid-barbituric acid photometry
Measurement range: 2-100ug/L (calculated as CN-)
Detection limit: ≤0.2 ug (calculated as CN-) (Using a 2.0ug/L concentration spiked recovery sample as the experimental standard, the recovery rate should be greater than 90%)
Online sulfide:
Analysis method: p-Aminodimethylaniline photometry
Measurement range: 1.0 ~ 10.0 mg S/L
Detection limit: ≤0.006 mg S/L
Total phosphorus:
Method principle: Ammonium molybdate spectrophotometry
Range: 0.1 – 10.0 mg P/L
Detection limit: ≤0.007 mg P/L
Total nitrogen:
Method principle: Sulfanilamide diazotization reaction colorimetric method
Range: 0.2 – 10.0 mg N/L
Detection limit: ≤0.006 mg N/L
Online ammonia nitrogen (surface water):
Method principle: Salicylate photometry
Analysis speed: ≥78 samples/hour
Range: 0.10 – 5.0 mg N/L
Detection limit: ≤0.006 mg N/L
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