Spectral analysis touch screen visible light photometer total nitrogen, total phosphorus, ammonia nitrogen tester

Spectral analysis touch screen visible light photometer total nitrogen, total phosphorus, ammonia nitrogen tester

Spectral analysis touch screen visible light photometer total nitrogen, total phosphorus, ammonia nitrogen tester

• X2 TSP visible spectrophotometer can detect iron (ortho phenanthroline method)：

• First, add hydroxylamine hydrochloride to reduce Fe ³ ⁺ → Fe ² ⁺, then adjust the pH to 3.5~4.5 and add a color developer.

• Residual chlorine (DPD method)：

• After color developmentWithin 2 minutesComplete the measurement (to avoid oxidation and fading).

• Ammonia nitrogen (Nessler's reagent method)：

• The water sample needs to be pre distilled (if it contains Ca ² ⁺>250mg/L or organic matter interference).

• Silicon (Silicon Molybdenum Blue Method)：

• Add oxalic acid to mask phosphate interference, and control the color development temperature at 20-30 ℃.

3. Direct spectrophotometry (without color development)

• nitrate：

• Measure the absorbance at 220 nm and at the same time measure at 275 nm after deducting the organic background:

  $${\text{NO}}_3^{-}\text{concentration}=A_{220}-2.5\times A_{275}$$

• residual chlorine：

• At low concentrations, the DPD method can be used, while at high concentrations (>5 mg/L), the UV absorbance at 292 nm can be directly measured.

• 
  

Shanghai Spectrum Analysis Instrument Co., Ltd. is a high-tech enterprise specializing in the independent research and development, production, sales, and service of laboratory scientific instruments. The company is located in Jiufu Economic Development Zone, Songjiang District, Shanghai. The company was founded in 2012 and has continuously enriched its product line. The people-oriented management philosophy has been established, and the company is developing towards a scientific and healthy track.
The company specializes in commonly used laboratory instruments, including spectral analysis instruments such as UV visible spectrophotometers, visible spectrophotometers, dual beam UV visible spectrophotometers, flame spectrophotometers, thin film solid testing instruments, nitrogen blowers, solid-phase extractors, Soxhlet extractors, acidimeters, balances, laboratory consumables, accessories, and supporting standard reagent kits.