Measurement-Procedure-Standardisations.md

@@ -30,6 +30,8 @@ Now the
  
 *Refers to the type of sampling used by the primary sampling instrument measurement instrument, or is the sample preparation phase).*
 
+**associated metadata variables:** `primary_sampling_type` , `measuring_instrument_sampling_type`
+
 | Name                 | Definition                                                         |
 | -------------------  | ------------------------------------------------------------------ |
 | continuous           | air is drawn in continuously, with a consistent flow rate          |
@@ -43,6 +45,8 @@ Now the
 
 *Refers to all preparations made before the ultimate measurement of sample. These can be multiple in number.*
 
+**associated metadata variables:** `sample_preparation_methodology_types`
+
 | Name                 | Definition                                                         |
 | -------------------  | ------------------------------------------------------------------ |
 | flask                | sample was collected/stored in measurement flasks/canisters before analysis |
@@ -51,3 +55,11 @@ Now the
 | filter pack          | sample was collected in a filter pack, selectively retaining compound(s) of interest | denuder              | air was passed through a denuder before analysis to selectively retain compound(s) of interest (a denuder is cylindrical or annular conduit or tube internally coated with a reagent that selectively reacts with a stable flow of gas) |
 | sorbent tube         | sample was passed through a sorbent tube to trap and retain the compound(s) of interest |
 | reagent reaction     | reagent reaction: sample reacted with a liquid/solid chemical reagent before measurement |
+
+### measurement_method
+
+*Refers to the method utilised in the ultimate measurement of a parameter.*
+
+**associated metadata variables:** `sample_preparation_methodology_types`, `measurement_methodology`
+
+ 
\ No newline at end of file