Table 4 Comparison of methods

100–1000 nmol/L

30 nmol/L

0.9950

(Yu et al. 2013)

0–0.5 mmol/L

8 μmol/L

–

(Lu et al. 2014)

1 nM–100 μmol/L

0.5 nmol/L

0.996

(Zhang et al. 2018d)

0.1 pM-5 nmol/L

0.1 pmol/L

0.9984

(Wang et al. 2018)

0.1–10 μmol/L

33 nmol/L

0.98

(Lee et al. 2014)

10–850 nmol/L

5.0 nmol/L

0.9901

(Mashhadizadeh et al. 2017)

0.5–8.0 μmol/L

91.6 nmol/L

0.99

(Zhu et al. 2016)

5–230 nmol/L

2.4 nmol/L

0.9854

(Shahsavar et al. 2017)

5 nmol/L–50 mmol/L

1.597 pmol/L

0.9914

(Gu et al. 2020)

20 fmol/L–100 nmol/L

20 fmol/L

0.997

(Yang et al. 2019)

50 nmol/L–5 mmol/L

2 nmol/L

0.996

(Ma et al. 2019)

50–500 nmol/L

138.0 pmol/L

0.98951

This work