diff --git a/src/main/java/com/xydl/cac/model/SanbizhiModel.java b/src/main/java/com/xydl/cac/model/SanbizhiModel.java
index 56065df..f69ccf0 100644
--- a/src/main/java/com/xydl/cac/model/SanbizhiModel.java
+++ b/src/main/java/com/xydl/cac/model/SanbizhiModel.java
@@ -25,17 +25,17 @@ public class SanbizhiModel {
         while (it.hasNext()) {
             String key = it.next();
             Object value = map.get(key);
-            String name = key.toLowerCase();
+            String name = key.toLowerCase().replace("ppm", "");
             if (value != null) {
-                if (name.contains("c2h2")) {
+                if (name.equals("c2h2")) {
                     c2h2 = Float.parseFloat(value.toString());
-                } else if (name.contains("c2h4")) {
+                } else if (name.equals("c2h4")) {
                     c2h4 = Float.parseFloat(value.toString());
-                } else if (name.contains("ch4")) {
+                } else if (name.equals("ch4")) {
                     ch4 = Float.parseFloat(value.toString());
-                } else if (name.contains("h2")) {
+                } else if (name.equals("h2")) {
                     h2 = Float.parseFloat(value.toString());
-                } else if (name.contains("c2h6")) {
+                } else if (name.equals("c2h6")) {
                     c2h6 = Float.parseFloat(value.toString());
                 }
             }