Due to its sequestration and diffusion properties, polyphosphates are widely used in industrial production. The traditional method is to estimate the average chain length of polyphosphate by titrating its tail group, but there is no information about its oligomer. The chain length affects its chelation and diffusion properties, so manufacturers and users need to determine the chain length. This article provides a method for separating polyphosphates with approximately 35 phosphoric acid units.
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