Laboratory Medicine and Quality Assurance

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Fig. 1. Changes in index values of hepatitis serology tests using prepared external quality materials stored at room temperature (RT), 2–8℃, -20℃, and -80℃. Samples from freeze-thaw 4 cycles also tested. (A) IL-19-01 HBsAg. (B) IL-19-01 HBeAg. (C) IL-19-01 HBc IgG. (D) IL-19-01 anti-HBe. (E) IL-19-02 anti-HBs. (F) IL-19-02 anti-HBe. (G) IL-19-03 anti-HAV total. (H) IL-19-04 anti-HCV. Abbreviations: RT, room temperature; HBsAg, hepatitis B virus surface antigen; HBeAg, hepatitis B virus envelope antigen; HBc, hepatitis B virus core; IgG, immunoglobulin G; anti-HBe, hepatitis B virus envelope antibody; anti-HBs, hepatitis B virus surface antibody; anti-HAV, hepatitis A virus antibody; anti-HCV, hepatitis C virus antibody; S/C, signal-to-cutoff.
Lab Med Qual Assur 2024;46:66~71
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