Table 2.

Effects of 0.1 M MgCl3 and 4 M urea on virus adsorption to microporous filters at pH 7a

FilterVirus% Adsorption in the presence of:
BufferBuffer containing 4 M ureaBuffer containing 4 M urea plus 0.1 M MgCl2
Millipore HAMS28 Ab 6 A1 B
PRD-16 A3 A3 A
φX1744 A4 A2 A
Poliovirus 13 A7 A2 A
Mean552
FiltriteMS26 A8 A3 B
PRD-111 A6 A2 B
φX1743 A3 A1 A
Poliovirus 110 A11 A10 A
Mean874
WhatmanMS218 A4 B5 B
PRD-17 A4 A4 A
φX1745 A5 A7 A
Poliovirus 18 A4 A7 A
Mean1046
1MDSMS296 A96 A6 B
PRD-197 A90 A11 B
φX17429 A21 A10 B
Poliovirus 179 A68 A8 B
Mean75699
  • a We added approximately 105PFU of virus to 25-ml portions of buffer, buffer containing 4 M urea, and buffer containing 4 M urea plus 0.1 M MgCl2, 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.