diff --git a/dlp-drugtesting-biz/src/main/java/digital/laboratory/platform/inspection/service/impl/TestRecordSampledataExpandServiceImpl.java b/dlp-drugtesting-biz/src/main/java/digital/laboratory/platform/inspection/service/impl/TestRecordSampledataExpandServiceImpl.java
index 7d9273c..141fd0f 100644
--- a/dlp-drugtesting-biz/src/main/java/digital/laboratory/platform/inspection/service/impl/TestRecordSampledataExpandServiceImpl.java
+++ b/dlp-drugtesting-biz/src/main/java/digital/laboratory/platform/inspection/service/impl/TestRecordSampledataExpandServiceImpl.java
@@ -281,7 +281,7 @@ public class TestRecordSampledataExpandServiceImpl extends ServiceImpl<TestRecor
                         if (isNPSCase) {
                             sampleDataExpand.setIonAbundanceRatioWithinError(
                                     processInspectDataService.getWithinErrorText(
-                                            ionAbundanceRatioError,
+                                            ionAbundanceRatioError.abs(),
                                             processInspectDataService.getErrorRange(stdDataExpand.getIonAbundanceRatio())
                                     )
                             );