PIPERAZINE DIHYDROCHLORIDE AND GLYCYLGLYCINE AS NON-TOXIC BUFFERS IN DISTILLED WATER AND IN SEA WATER,

Publisher Website
Google Scholar
Abstract
Piperazine dihydrochloride and glycylglycine as buffers have the advantages of good solubility, availability, convenience, accuracy of buffer prepn., low toxicity, lack of volatility, and the lack of precipitation of Ca and Mg salts from sea water below a pH of 9.9. A table is presented showing the prepn. of solns. at 25[degree]C of known pH of these substances and equimolecular mixtures of these substances in dist. water and in sea water. Another table shows pK1[image] and pK2[image] values for piperazine dihydrochloride for several ionic strengths. The extrapolated pK values of piperazine at infinite dilution were found to be 5.32 for pK1 and 9.70 for pK2.
Keywords