Biological soil detector

A biological soil detector, comprising:

• A solid support member treated with at least one amine or quaternized ammonium functional coating immobilizing a specific indicator;
• The specific indicator immobilized on the coating on the solid support member;
• wherein the specific indicator is selected to detect a component of biological soil selected from the group consisting of protein, endotoxin, enzyme, nucleotide, and combinations of two or more of the foregoing;
• wherein the specific indicator is in a predetermined or ordered pattern on the presence of biological soil;
• and
• A retaining member holding the solid support thereon, the retaining member and solid support configured to facilitate contact between the solid support a surface, wherein the retaining member is dimensioned to fit within a channel to place the solid support member in contact with walls of the channel, and wherein the retaining member is of sufficient length to ensure that the solid support member can be exposed to the walls of the channel along the entire length of the channel, the retaining member comprising a first end and a second end and an elongate body portion extending between the first end and the second end;
• wherein the solid support member is a flexible material so that the solid support member fits within the channel in a manner facilitating contact between the specific indicator and the walls of the channel.