Fig. 2.
Multidimensional scaling plots of Random Forest proximity scores from supervised classification models of flow infusion electrospray ionisation high-resolution MS fingerprint data using storage treatment as the response value. Storage treatments were as follows: control, –20°C, T1, 2 d at 4°C, T2, 7 d at 4°C; T3, 2 d at room temperature (RT); T4, 7 d at RT. (a) Preservative-coated tubes, (b) non-preservative-coated tubes. Samples are coloured by individual, and shapes indicate treatment. Participant: 
, 1; 
, 2; 
, 3; 
, 4; 
, 5; 
, 6; 
, 7; 
, 8; 
, 9; 
, 10; 
, 11; 
, 12. Storage treatment: 
, control; 
, T1; 
, T2; 
, T3; 
, T4