Your coworker is analyzing a NIST soil standard for Nickel by atomic spectroscopy and finds recovery to be 145.9%. After freaking out over the poor results, she adds a 10.0 ppb nickel spike to that sample and determines a 95.4% spike recovery. She repeats the analysis of both standard and spike with the same results. She prepares and analyzes a whole new set of calibration standards. Using the new calibration curve she analyzes standard and spike again. She still gets the same results. Totally perplexed, she comes to you for advice. What will you tell her? What type of problem does she have (be specific)? How can she solve the problem?