Table 3: ${\rm NH_{2}D}$ and ${\rm NH_3}$ column densities, rotational temperature and fractionation.
Source $T_{\rm rot}$ a $N_{\rm NH_3}$ b $N_{\rm NH_2D}$ c [ ${\rm NH_{2}D}$/ ${\rm NH_3}$]d
  K $10^{15} \left(10^{14}\right)~\rm cm^{-2}$ $10^{13}~\rm cm^{-2}$  

G8.13+0.25		 18.0 (3.0) 1.8 (0.4) 1.7 (0.1) 1.0 (0.2)
  17.4 (2.3) 1.6 (0.3) 2.4 (0.1) 1.5 (0.3)
G8.68-0.37 12.1 (0.8) 1.3 (0.1) 39.4 (12.4) 30.3 (9.8)
G8.71-0.37 13.3 (1.0) 1.5 (0.2) 59.7 (10.6) 39.8 (8.9)
G10.21-0.31 15.4 (1.5) 2.1 (0.3) 70.9 (29.9) 33.7 (15.0)
G10.21-0.32 14.1 (0.7) 2.1 (0.1) 51.3 (22.3) 24.4 (10.7)
G10.61-0.33 17.8 (1.5) 2.3 (0.2) 1.0 (0.1 ) 0.4 (0.1)
G11.11-0.12P1 12.5 (1.2) 1.4 (0.2) 54.0 (23.5) 38.6 (17.7)
G11.11-0.12P4 10.6 (1.6) 1.8 (0.5) 1.7 (0.3 ) 0.9 (0.3)
G12.19-0.12 12.6 (0.3) 4.4 (0.2) 5.6 (0.2 ) 1.3 (0.1)
G13.18+0.06 17.4 (1.3) 2.8 (0.2) 88.9 (23.2) 31.7 (8.6)
G18.17-0.30 15.8 (1.2) 1.8 (0.2) 119.7 (31.5) 66.5 (19.0)
G18.21-0.34 15.5 (1.2) 1.7 (0.2) 47.3 (19.7) 27.8 (12.0)
G23.41-0.23 18.8 (1.8) 2.5 (0.3) 77.7 (51.3) 31.1 (20.8)
G23.44-0.18 23.3 (1.5) 5.2 (0.4) 5.0 (0.2 ) 1.0 (0.1)
G27.29+0.15 17.8 (1.7) 3.0 (0.3) 1.4 (0.2 ) 0.5 (0.1)
G28.34+0.06P2 15.7 (2.0) 2.2 (0.3) 4.1 (0.2 ) 1.9 (0.3)
G29.97-0.05 13.7 (1.4) 2.2 (0.3) 67.7 (15.2) 30.8 (8.1)
G33.71-0.01 19.5 (4.6) 3.0 (0.8) 1.4 (0.1 ) 0.5 (0.1)
G34.81-0.28 16.6 (1.0) 1.6 (0.1) 2.7 (0.2 ) 1.7 (0.2)
G35.19-1.73 17.0 (0.9) 1.8 (0.1) 74.0 (11.0) 41.1 (6.5)
G79.34+0.33 13.7 (1.0) 1.4 (0.1) 17.9 (15.9) 12.8 (11.4)
G81.74+0.59 18.4 (1.1) 2.7 (0.2) 92.9 (17.6) 34.4 (7.0)
a Rotational temperature derived from ${\rm NH_3}$ observations. b ${\rm NH_3}$ column density. c  ${\rm NH_{2}D}$ column density. d Ratio of ${\rm NH_3}$ and ${\rm NH_{2}D}$ column densities in percentage. Note: similar notations are used for other molecules elsewhere in this paper.

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