Survey meter equipped with a low energy NaI scintillation probe is necessary.
Thyroid bioassay is required after radioiodination. Store NaI-125 solutions at room temperature because freezing results in subsequent volatilization of radioiodine. Avoid acidic solutions to minimize volatilization. Some radioiodine compounds skin and gloves, therefore, these compounds should be handled indirectly by using tools and two pairs of gloves, with the outer pair being changed every 30 minutes or if contamination is suspected.