Measurement-Procedure-Standardisations.md

@@ -28,11 +28,23 @@ Now the
 
 ### sampling_type
  
-**Definition:** *refers to the type of sampling used by the primary sampling instrument measurement instrument, or is the sample preparation phase).*
+*Refers to the type of sampling used by the primary sampling instrument measurement instrument, or is the sample preparation phase).*
 
 | Name                 | Definition                                                         |
 | -------------------  | ------------------------------------------------------------------ |
 | continuous           | air is drawn in continuously, with a consistent flow rate          |
 | injection            | instrument is injected with limited quantities of air              |
 | continuous injection | instrument is periodically injected with limited quantities of air |
-| passive              | air is not drawn in, rather the air sampled is the ambient air which interacts which measurement apparatus. |
+| passive              | air is not drawn in, rather the air sampled is the ambient air which interacts which measurement apparatus |
+| remote               | instrument does not actively sample air, but uses advanced optical techniques to measure parameters in air over long distances |
+| manual               | no instrument is used to determine measured values, they are determined manually (e.g. this applies for some colorimetric methods where measured values are derived manually via the colour of reagent after reaction with a compound of interest) |  
+
+### sample_preparation
+
+*Refers to all preparations made before the ultimate measurement of sample. These can be multiple in number.*
+
+| Name                 | Definition                                                         |
+| -------------------  | ------------------------------------------------------------------ |
+| flask                | sample was collected/stored in measurement flasks/canisters before analysis |
+| preconcentration     | sample was preconcentrated before analysis. This refers to the process of concentrating a sample before analysis, so that trace components won't be overlooked. This is done typically through absorption of the sample onto a cooled, sorbent-packed trap before thermal desorption to transfer very quickly the sample to the analytical system. Can be more than 1 trap, with different adsorbents |
+| filter               | air was passed through a filtering system before analysis, selectively retaining compound(s) of interest |