“…Compared with other assays, the CEDIA appears to be most affected by bleach adulteration. Wu et al (1995) reported that bleach interfered with screening for drugs other than THC, including amphetamine, barbiturates, benzodiazepines, cocaine, opiates, and PCP in the CEDIA, with concentrations as low as 1% (Wu et al, 1995). Bleach is also extremely effective in adulterating urine screens positive for barbiturates, benzodiazepines, cocaine, and opiates in the EIA (Mikkelsen & Ash, 1988).…”