working principle

The portable total phosphorus analyzer consists of a digester and a photometer. The principle is to add a reagent in a neutral medium, digest the sample under high temperature heating conditions, and oxidize all the phosphorus contained in the water sample to orthophosphate. In an acidic medium, orthophosphate reacts with a reagent to form a blue complex. By measuring the absorbance, the total phosphorus content of the water sample can be determined.

Features

1 Accurate determination of total phosphorus in wastewater;

2 memory 20 standard curves can be self-repaired and saved;

3 No need to manually make curves, the instrument can automatically calculate the storage curve according to the standard sample;

4 can accurately store 1000 data details (measurement time, parameters, values)

5 print current data and all stored historical data

6 Transfer current data and all stored historical data to the PC

7 Decomposition power is automatically adjusted with the load quantity to achieve true constant temperature control

Upgrade features

1 It adopts natural reflow method to completely seal the digestion. The digestion tube adopts imported heat-resistant and acid-resistant glass tube and PTFE sealing ring and screw cap for safe operation.

2 Simultaneous digestion of 20 samples, automatic temperature control, timing. After the reaction is completed, the digester automatically shuts down. The amount of sample and reagent is small, the secondary pollution is reduced, and the analysis speed is fast.

work process

After the sample was filtered, it was pumped into the LFA reactor. In the LFA reactor, the acidic agent R1 is first injected; then the mixed sample is heated to 95 ° C to acidify all the inorganic phosphides to orthophosphate; secondly, the oxidant R2 is injected for UV digestion to oxidize the residual organic phosphide. After the phosphate is added, the microprocessor starts to add the drug in order. In order to cause the color reaction of P-PO4, the coloring agent is first added, and the ascorbic acid is added to form a blue substance. After sufficient drug mixing and reaction, the analyzer measured this blue material at 660 nm. The concentration of the sample is calculated based on the correction factor stored in the analyzer.

Safety attention

The matching reagents are corrosive and should not be touched by hands. Pay special attention to all hazard and warning information. Failure to do so may result in operator injury or damage to the instrument. Please find out more about the reagents used in the assay and read the product label before use. Wearing protective goggles before handling chemicals is a good practice. Please follow the instructions carefully. If you come into contact with chemicals, wash them thoroughly with water. If you have questions about the reagents or the procedure, please contact the company.

Battery installation

Press the two poles of the battery and the ends of the battery cap tightly, and put them into the battery compartment, and cover the battery cover.

Operation process (total phosphorus determination)

1. Pipette the sampled water sample into the cuvette by about three-quarters.

2. Dry the water droplets on the glossy surface of the cuvette with a rag to ensure that the cuvette has no residue on the smooth surface.

3. After booting, put the sample cuvette into the colorimetric cell.

4, cover the cover, and then press the "zero" button to zero

5, when the display "0.00" means that the zero adjustment is completed, do not take out the cuvette, do not shut down

6. Take 5ml of the sample to the glass bottle, and add 3 drops of total phosphorus activator K1, shake it evenly from side to side.

7. Add a packet of powder reagent to the water sample to be tested with total phosphorus activator.

8. Shake evenly until dissolved, take a small amount of solution to rinse the cuvette, and then take the solution into the cuvette.

9. Cover the analyzer cover, press the “Read” button to read, and count down for 3 minutes. After the timer expires, the concentration of the solution will automatically start to be detected. The displayed value is the measured concentration value.

Precautions

1. After the reagent is dissolved, it needs to be measured within 3~5 minutes. After 5 minutes, the measurement will affect the accuracy. When the temperature is low and it is not easy to dissolve, the sample bottle can be held by hand (the optimal detection temperature of total phosphorus is 15-25 degrees).

2. In order to make the measurement accurate, the cuvette surface must be cleaned with lens paper or soft paper before the cuvette is inserted into the cuvette. Any liquid that flows into the cuvette may damage the instrument.

3. If the concentration of the water sample exceeds the range of the analyzer, dilute the water sample and re-measure the measured value multiplied by the dilution factor to determine the water sample concentration value.

4. The activator is packaged in a dropper bottle for easy dripping. Pay attention to the order of addition and the number of drops when using.

5. The reagent packaging bag is an easy-to-tear bag that can be torn open on any side.

6. If the solid or solution enters the colorimetric cell, it must be wiped clean before being placed in the cuvette.

7. When the analyzer is used up, clean the cuvette and the sample bottle. Press the “on/off” button to turn off the power.

8. After the cuvette is used, if the inner wall is dirty, the cleaning solution can be prepared by using 1:1 ratio of 3mol/L hydrochloric acid and ethanol, and then the cleaning solution is shaken in the cuvette for 15 seconds to achieve the cleaning purpose.

Total phosphorus interference

Arsenate, PH, heavy metals over 100mg/L, sulfide, turbidity and color

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