diff --git a/src/app/home/home.component.html b/src/app/home/home.component.html
index 0327feb..240b573 100644
--- a/src/app/home/home.component.html
+++ b/src/app/home/home.component.html
@@ -9,7 +9,7 @@
                         class="selection" (ngModelChange)="updateGroups($event)">
         <span *rbFormMultiSelectOption="let key">{{key.id}}</span>
     </rb-form-multi-select>
-    
+
     <div id="divChart">
         <canvas id="myChart">
         </canvas>
diff --git a/src/app/samples/samples.component.ts b/src/app/samples/samples.component.ts
index 40b45e6..c54d123 100644
--- a/src/app/samples/samples.component.ts
+++ b/src/app/samples/samples.component.ts
@@ -188,9 +188,9 @@ export class SamplesComponent implements OnInit {
   }
 
   // set toPage to null to reload first page, queues calls
-  loadSamples(options: LoadSamplesOptions = {}, event = null, categorie?) {
+  loadSamples(options: LoadSamplesOptions = {}, event = null, category?) {
     if (event) {  // adjust active keys
-      this.categories[categorie].forEach(key => {
+      this.categories[category].forEach(key => {
         if (event.hasOwnProperty(key.id)) {
           key.active = event[key.id];
         }
@@ -271,8 +271,8 @@ export class SamplesComponent implements OnInit {
       query.push('key=' + this.d.d.userKey.key);
     }
 
-    for (let categorie in this.categories) {
-      this.categories[categorie].forEach(key => {
+    for (let category in this.categories) {
+      this.categories[category].forEach(key => {
         if (key.active && (options.export || (!options.export && key.id.indexOf('material.') < 0))) {
           query.push('fields[]=' + key.id);
         }
@@ -339,8 +339,8 @@ export class SamplesComponent implements OnInit {
 
   storePreferences() {
     let keys = [];
-    for (let categorie in this.categories) {
-      keys.push(...this.categories[categorie].map(e => pick(e, ['id', 'active'])));
+    for (let category in this.categories) {
+      keys.push(...this.categories[category].map(e => pick(e, ['id', 'active'])));
     }
 
     const store = {
@@ -366,10 +366,10 @@ export class SamplesComponent implements OnInit {
       });
 
       store.keys.forEach(key => {
-        for (let categorie in this.categories) {
-          const keyIndex = this.categories[categorie].findIndex(e => e.id === key.id);
+        for (let category in this.categories) {
+          const keyIndex = this.categories[category].findIndex(e => e.id === key.id);
           if (keyIndex >= 0) {
-            this.categories[categorie][keyIndex].active = key.active;
+            this.categories[category][keyIndex].active = key.active;
           }
         }
       });
@@ -395,8 +395,8 @@ export class SamplesComponent implements OnInit {
 
   updateActiveKeys() {  // array with all activeKeys
     this.activeKeys = [];
-    for (let categorie in this.categories) {
-      this.activeKeys.push(...this.categories[categorie].filter(e => e.active));
+    for (let category in this.categories) {
+      this.activeKeys.push(...this.categories[category].filter(e => e.active));
       this.filters.filters.forEach(filter => {  // disable filters of fields not displayed
         if (!this.isActiveKey[filter.field]) {
           filter.active = false;
@@ -406,8 +406,8 @@ export class SamplesComponent implements OnInit {
   }
 
   calcFieldSelectKeys() {
-    for (let categorie in this.categories) {
-      this.categories[categorie].forEach(key => {
+    for (let category in this.categories) {
+      this.categories[category].forEach(key => {
         this.isActiveKey[key.id] = key.active;
       });
     }