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Table 3 Comparison with reported methods for the Sudan dyes determination

From: Determination of Sudan red contaminants at trace level from water samples by magnetic solid-phase extraction using Fe@NiAl-layered double hydroxide coupled with HPLC

Sample pretreatment method Detection method Matrices Linear ranges (μg L−1) LOD (μg L−1) Refs.
Sudan II Sudan III Sudan IV
MSPE HPLC Water 0.025–5 0.025–5 0.025–5 0.0029–0.0068 [4]
MSPE UFLCa Juice 0.0208–15 0.0208–15 0.0625–15 0.0057–0.017 [5]
MSPE Capillary LC Food 0.25–2 0.25–2 0.25–2 0.05–0.07 [18]
DLLMEb HPLC Water 0.3–40 1.2–160 1.2–160 0.18–0.46 [21]
MA-LLMEc HPLC Juice 4.5–300 4.50–250 4.50–250 1.14–1.30 [53]
MSPE HPLC Water 0.1–300 0.1–300 0.1–300 0.002–0.005 Present work
  1. aUltrafast liquid chromatography
  2. bDispersive liquid–liquid microextraction
  3. cMicrowave-assisted liquid–liquid microextraction