Test method for content of polyferric sulfate

The content detection of Polyferric Sulfate usually refers to the measurement of the content of its main component - iron ion. As polyferric sulfate is a complex inorganic polymer compound, its detection methods are diverse, covering chemical analysis and instrumental analysis. The following are some common detection methods:

1、 Chemical analysis method

1. titration

• potassium dichromate titration: This is a commonly used method for the determination of total iron content. By reacting the polyferric sulfate sample with hydrochloric acid, and then titrating with potassium dichromate standard solution, the iron content is calculated according to the amount of potassium dichromate consumed.
• titanium trichloride method: use titanium trichloride to reduce iron ions, and then determine the total amount of reduced iron ions by titration or other methods.

2. spectral method

• atomic absorption spectrometry (AAS): This is a high-precision method to quantitatively determine the iron content in polyferric sulfate by measuring the radiation intensity of the characteristic wavelength of atomic vapor absorption of specific elements in the sample.
• UV Vis spectrometry: it can measure the absorbance of polyferric sulfate under certain specific conditions and indirectly calculate the iron content.

2、 Instrumental analysis method

• atomic fluorescence spectrometry: determine the content of iron by measuring the fluorescence intensity of atomic vapor emission.
• Silver diethyldithiocarbamate spectrophotometry: This is a photometric method based on color reaction, which can be used to determine iron content.

3、 Detection of other physical properties

• density detection: by measuring the density of Pfs, we can indirectly understand its concentration, but this is usually not a direct method to determine the iron content, but an indicator of PFS quality control.

4、 Standard reference

When testing polyferric sulfate, it should refer to relevant national standards or industrial standards, such as the testing methods and standards specified in the Chinese national standard gb/t14591-2016 polyferric sulfate for Water Treatment agent. Laboratory testing is usually performed by a qualified third-party testing agency to ensure the fairness and accuracy of data.

When testing, it should be operated in strict accordance with the corresponding standards to ensure the accuracy and reliability of testing. If necessary, you can consult a qualified third-party testing agency or relevant experts to obtain more detailed testing methods and operation guidance.