@@ -674,6 +674,10 @@ void RcppPwiz::addSpectrumList(MSData& msd,

       if (ionInjectionTime[i] > 0)

 	spct_scan.set(MS_ion_injection_time, ionInjectionTime[i], UO_minute);

     }

+

+    if (!Rcpp::StringVector::is_na(filterString[i]))

+      spct_scan.set(MS_filter_string, filterString[i]);

+

     // MSn - precursor:

     if (precursorScanNum[i] > 0 | precursorMZ[i] > 0) {

       // Fill precursor data. This preserves the precursor data even if the

@@ -731,9 +735,6 @@ void RcppPwiz::addSpectrumList(MSData& msd,

       spct_ints->data[j] = ints_vals[j];

     spct.binaryDataArrayPtrs.push_back(spct_ints);

     spct.defaultArrayLength = spct_mz->data.size();

-

-    if (!Rcpp::StringVector::is_na(filterString[i]))

-      spct.set(MS_filter_string, filterString[i]);

   }

 }