Allyloxy polyethoxy ether (APEG) and succinic anhydride were used to prepare allyloxy polyethoxy carboxylate (APEL). The 8-hydroxy-1,3,6-pyrene trisulfonic acid trisodium salt (PY) was reacted with allyl chloride to produce fluorescent monomer 8-allyloxy-1,3,6-pyrene trisulfonic acid trisodium salt (PA). APEL and PA were copolymerized with acrylic acid (AA) to synthesize PA-tagged no phosphate and nitrogen free calcium phosphate inhibitor AA–APEL–PA. Structures of PA, APEG, APEL, and AA–APEL–PA were carried out by FT-IR and 1H NMR. Different AA:APEL mole ratios were employed for the manufacture of AA–APEL–PA to study the effect of mole ratio on performance of AA–APEL–PA. Relationship between AA–APEL–PA’s fluorescent intensity and its dosage was studied. The results indicate that capability of AA–APEL–PA is heavily depended on the mole ratio of AA:APEL. Correlation coefficient r of AA–APEL–PA’s fluorescent intensity and its dosage is 0.9995, and detection limit of AA–APEL–PA is 0.98 mg/L. AA–APEL–PA can be used to accurately measure polymer consumption on line besides providing excellent calcium phosphate inhibition.
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Liu et al. (2012) studied this question.
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