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- F, Urine
- Sodium Fluoride
Creatinine, urine; fluoride, urine; fluoride:creatinine ratio
Monitor chronic exposure to fluoride
Ion-selective electrode (ISE) potentiometry
• Environmental exposure: 0.2−3.2 mg/L
• Occupational exposure: BEI® (sampling time is prior to shift): 3.00 mg/g creatinine;1 BEI® (sampling time is end of the shift): 10.00 mg/g creatinine1
BEI® are reference values intended as guidelines for evaluation of occupational exposure. BEI® represent biological levels of chemicals that correspond to workers with inhalation exposure equivalent to the threshold limit value (TLV®) of the chemicals. TLVs refer to the airborne concentrations of substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, without adverse health effects.1
Sampling time is prior to shift or end of shift for industrial monitoring. Inorganic analytes with timing “end of shift” (meaning the last two hours of exposure) or “prior to next shift” are eliminated rapidly with a half-life less than five hours. Such analytes do not accumulate in the body and, therefore, their timing is critical only in relation to the exposure and postexposure periods.
Maintain specimen at room temperature.
Causes for Rejection
Specimen received in a glass container.
Do not use preservative. Preservatives used for routine analysis may contain mercuric oxide (ie, Stabilur), which interferes with all metal testing. If both urinalysis and metal testing are ordered, please submit a separate urine specimen (containing no additive) for the metal testing.
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|070052||Fluoride, Urine||070053||Fluoride, Urine||mg/L||5650-7|
|070052||Fluoride, Urine||070056||Fluoride/Crt Ratio||mg/g creat||13475-9|