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Table 2 The analytical parameters for the three developed methods

From: Development of new analytical methods for the determination of caffeine content in aqueous solution of green coffee beans

Methods

Liner range

R

LOD

LOQ

RSD (%)

FT-IR-ATR

(1–6) g/L

0.993

0.15 g/L

0.5 g/L

5.9

NIR

(1–5) g/L

0.994

0.3 g/L

1 g/L

9.3*

Fluorescence

(5.95 × 10−4–87.3 × 10−4) g/L

0.998

1.75 × 10−4 g/L

5.82 × 10−4 g/L

3.7

  1. *The relatively higher RSD may be attributed to the high background absorption of solvent water which results in higher noise level