Application of Combustion Module Coupled with Cavity Ring-Down Spectroscopy for Simultaneous Measurement of SOC and δ¹³C-SOC

Table 2

Measured C content and recovery rates (RRs) of three standard materials and three soils determined by CM-CRDS and comparison system (EA).

Substance	EA (mg C)	CM-CRDS (mg C)	RR (%)
Atropine ()	0.2929	0.2938	100.31
NaHCO3 ()	0.6226	0.6112	98.17
CaCO3 ()	0.2973	0.2833	95.29
Soil-1 ()	1.7000	1.7618	103.63
Soil-2 ()	2.0779	2.1690	104.38
Soil-3 ()	2.2637	2.3763	104.97