"Diagnosis as mentioned, the clinical signs associated with lead intoxication can be nonspecific, making diagnosis difficult. Radiographs may identify metallic objects in the GI tract. However, the absence of metal densities does not rule out metal exposure because the lead may have
come from an object that was passed or a nonradio dense form. Diagnosis of lead exposure or intoxication is most directly made by
measurement of lead in whole blood samples. Serum and plasma are not appropriate samples for lead analysis because lead associates
with red blood cells"