| 204 / | HD | CHEMISTRY: ELECTRICAL AND WAVE ENERGY |
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| * | DD | PROCESSES AND PRODUCTS {7} |
| 450 | DF | .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14} |
| 518 | DF | .~.~ Barrier separation (e.g., using membrane, filter paper, etc.) {5} |
| 520 |  | .~.~.~ Ion selective {8} |
| 521 | DF | .~.~.~.~> Combined with manufacture or pretreatment of barrier |
| 522 | DF | .~.~.~.~> Using both anion and cation selective membranes {4} |
| 535 | DF | .~.~.~.~> And using nonion selective membrane |
| 536 | DF | .~.~.~.~> And using ion exchange material (e.g., suspended particles, etc.) |
| 537 | DF | .~.~.~.~> Using bipolar membrane {1} |
| 539 | DF | .~.~.~.~> Using anion selective membrane |
| 540 | DF | .~.~.~.~> Biological material prepared, recovered, or treated (e.g., urine, etc.) |
| 541 | DF | .~.~.~.~> Organic material prepared, recovered, or treated |