1 EXHIBIT 10.52.1 JOINT FILING AGREEMENT The undersigned agree that the attached Schedule 13D and any amendments thereto and any Forms 3, 4 or 5 required to be filed by the undersigned relating to the Common Stock of Electropure, inc., a California...

   1
                                                                EXHIBIT 10.52.1

                             JOINT FILING AGREEMENT


   The undersigned agree that the attached Schedule 13D and any amendments
   thereto and any Forms 3, 4 or 5 required to be filed by the undersigned
   relating to the Common Stock of Electropure, inc., a California corporation,
   may be jointly filed.


   November 4, 1997



                            /S/  XXXXXX X. XXXXX
                            -------------------------------------------------
                                  Xxxxxx X. Xxxxx

                            XXXXX TECHNOLOGY CORPORATION

                            By     /S/  XXXXXX X. XXXXX
                                 --------------------------------------------
                                  Xxxxxx X. Xxxxx, President