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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: Nat Protoc. 2014 Jul 3;9(8):1771–1791. doi: 10.1038/nprot.2014.110

Table 3.

Typical conditions of the main variables affecting SNR in spectroscopy instruments.

Instrument options
FTIR ATR-FTIR
Variable Single-element
detector
 FPA
 Single-element
detector
 FPA
Light source Globara Synchrotronb Globarc Synchrotrond Globar e Globarf
Sampling aperture 15 × 15 to
150 × 150 μm		 5 × 5 to
20 × 20 μm		 700 × 700 μm
FOV		 50 × 50 to
175 × 175 μm		 250–250 μm 60 × 60 to 700 ×
700 μm
No. of co-additions 512 256 64 or 128 128 32 32
Spectral resolution 4 or 8 cm−1 4 or 8 cm−1 4 or 8 cm−1 4 or 8 cm−1 8 cm−1 4 or 8 cm−1
a

Ref. 141.

b

Refs. 119,142.

c

Refs. 142,143.

d

Refs. 76,144.

e

Refs. 145,146.

f

Patented by Agilent Technologies59.