Molecular size and dipole moment of NH₃ and all interfering compounds.

Different compounds	Dipole moment (D)	Molecular size (nm)	Ref.
Acetone	2.88	0.66	50
Formaldehyde	2.33	—	51,52
Ethanol	1.69	0.44	53
Isopropanol	1.66	0.47	7
Methanol	1.70	0.43	53
Trimethylamine	0.87	0.78	7
Dimethylamine	1.12	—	54
Ammonia	1.4	0.32	7,50,52