Table 4: Ice abundances relative to water ice.
Source $N_{{\rm ice}}$ (H₂O) $N_{{\rm ice}}$ (OCN^-)/ $N_{{\rm ice}}$ (CH₃OH)/ $N_{{\rm ice}}$ (CO)/

(10¹⁸ cm^-2) $N_{{\rm ice}}$ (H₂O) $N_{{\rm ice}}$ (H₂O) $N_{{\rm ice}}$ (H₂O)

(%) (%) (%)

LLN 8 0.80 $\pm$ 0.15 <0.2 <12.5 <22

LLN 8b 1.7 $\pm$ 0.4 ... ... ...

LLN 13 2.2 $\pm$ 0.4 <0.2 <4.5 55

LLN 13b 1.7 $\pm$ 0.4 ... ... ...

LLN 17 3.61 $\pm$ 0.70 1.7 6.9 15

LLN 17b 2.2 $\pm$ 0.2 <1.1 ... 17

LLN 19 1.05 $\pm$ 0.2 <0.7 <9.5 4

LLN 41 1.85 $\pm$ 0.4 <0.1 <5.4 22

LLN 41b 1.2 $\pm$ 0.4 <1.9 ... <15

**Table 4:** Ice abundances relative to water ice.
Source	$N_{{\rm ice}}$ (H₂O)	$N_{{\rm ice}}$ (OCN^-)/	$N_{{\rm ice}}$ (CH₃OH)/	$N_{{\rm ice}}$ (CO)/
	(10¹⁸ cm^-2)	$N_{{\rm ice}}$ (H₂O)	$N_{{\rm ice}}$ (H₂O)	$N_{{\rm ice}}$ (H₂O)
		(%)	(%)	(%)
LLN 8	0.80 $\pm$ 0.15	<0.2	<12.5	<22
LLN 8b	1.7 $\pm$ 0.4	...	...	...
LLN 13	2.2 $\pm$ 0.4	<0.2	<4.5	55
LLN 13b	1.7 $\pm$ 0.4	...	...	...
LLN 17	3.61 $\pm$ 0.70	1.7	6.9	15
LLN 17b	2.2 $\pm$ 0.2	<1.1	...	17
LLN 19	1.05 $\pm$ 0.2	<0.7	<9.5	4
LLN 41	1.85 $\pm$ 0.4	<0.1	<5.4	22
LLN 41b	1.2 $\pm$ 0.4	<1.9	...	<15

Source LaTeX | All tables | In the text