Performance Characteristics Detection Limit: ≤ 0.1 mIU/L(μIU/mL) ; Linear Range:  0.1~100 mIU/L(μIU/mL); Linear correlation coefficient R ≥ 0.990; Precision: within batch C.V. is ≤ 15%; between batches C.V. is ≤ 20%;   Accuracy: the relative deviation of the measurement results shall not exceed ± 15% when the accuracy calibrator prepared by TSH national standard or standardized accuracy calibrator are tested. Cross-Reactivity:The following substances do not interfere with the TSH test results at the indicated concentrations: FSH at 500 mIU/mL, LH at 500 mIU/mL and HCG at100000 mIU/L 1. Store the detector buffer at 2～30℃. The buffer is stable up to 18 months. 2. Store Aehealth Ferritin Rapid Quantitative test cassette at 2～30℃, shelf life is up to 18 months. 3. Test cassette should be used within 1 hour after opening the pack. The determination of serum or plasma levels of thyroid stimulating hormone (TSH or thyrotropin) is recognized as an important measurement in the assessment of thyroid function. Thyroid stimulating hormone is secreted by the anterior lobe of the pituitary gland, and induces the production and release of thyroxine (T4) and triiodothyronine (T3) from the thyroid gland.