Filter | Virus | % Adsorption in the presence of: | |||
---|---|---|---|---|---|

Buffer | Buffer containing 4 M urea | Buffer containing 4 M urea plus 0.1 M MgCl_{2} | Buffer containing 4 M urea plus 0.1 M AlCl_{3} | ||

Millipore HA | MS2 | >99 A^{b}
| 98 A | 15 B | 13 B |

φX174 | 98 A | 95 A | 9 B | 7 B | |

Poliovirus 1 | >99 A | >99 A | 12 B | 15 B | |

Mean | 99 | 97 | 12 | 12 | |

Filtrite | MS2 | >99 A | 95 B | 14 B | 11 B |

φX174 | 95 A | 92 B | 7 B | 8 B | |

Poliovirus 1 | 99 A | 99 A | 13 B | 15 B | |

Mean | 98 | 95 | 11 | 11 | |

Whatman | MS2 | 3 A | 9 A | 11 A | 7 A |

φX174 | 6 A | 4 A | 3 A | 6 A | |

Poliovirus 1 | 9 A | 7 A | 8 A | 4 A | |

Mean | 6 | 7 | 7 | 6 | |

1MDS | MS2 | 95 A | 95 A | 10 B | 8 B |

φX174 | 85 A | 69 A | 48 B | 30 C | |

Poliovirus 1 | 99 A | 99 A | 50 B | 10 C | |

Mean | 93 | 88 | 36 | 16 |

↵a We added approximately 10

^{5}PFU of virus to 25-ml portions of buffer, buffer containing 4 M urea, buffer containing 4 M urea plus 0.1 M MgCl_{2}, and buffer containing 4 M urea plus 0.1 M AlCl_{3}, and each type of solution was passed through the different types of filters at a rate of 1.5 ml/s. The numbers of viruses in the influent and effluent were measured in order to determine the percentage of adsorption in each case.↵b Values on the same line followed by the same letter are not significantly different at P = 0.05.