Patent ID: 7108979

Claim:
A method for determining if a first sample for a first array of a multiple array substrate is contaminated with a second sample for a second array of said substrate, said method comprising: (a) contacting said first array with said first sample under conditions suitable for specific binding of a first distinguishing cross-contamination target in said sample to a first set of at least one cross-contamination probes in said first array; (b) contacting said second array with said second sample under conditions suitable for specific binding of a second distinguishing cross-contamination target to a second set of at least one cross-contamination probes in said second array; and (c) evaluating binding of said second distinguishing cross-contamination target to said first set of cross-contamination probes; wherein binding of said second distinguishing cross-contamination target to said first set of cross-contamination probes indicates that said first sample is contaminated with said second sample.