Method validation parameters: linearity, linear range, limits of detection (LODs), limits of quantification (LOQs), mean recoveries (%) and relative standard deviations (RSDs%, n = 5) of three different spiked levels (n = 5) studied for intra-day and inter-day, matrix effect (ME%) and process efficiency (PE%) for pharmaceutical residues in seawater

PharmaceuticalsLinearity (r2)Linear range
(ng L–1)
LOD
(ng L–1)
LOQ
(ng L–1)
25 ng L–1100 ng L–1250 ng L–125 ng L–1100 ng L–1250 ng L–1ME%PE%
Rec (%)RSDr%Rec (%)RSDr%Rec (%)RSDr%Rec (%)RSDR%Rec
(%)
RSDR%Rec (%)RSDR%
Antibiotics
Erythromycin-H2O0.997725–2506.018.576.21.187.61.387.00.976.01.787.41.186.81.114.9100.7
N-Acetyl sulfamethoxazole0.998925–2501.85.376.40.879.21.775.61.374.01.476.82.178.21.90.679.6
Oxolinic acid0.997625–2509.826.485.20.985.01.288.61.378.61.52.086.9
Oxytetracycline0.999612.5–1255.016.781.41.290.00.886.21.377.41.686.01.382.21.59.298.3
Sulfadiazine0.999525–2502.58.586.61.189.01.276.61.182.41.294.82.482.41.2–18.872.2
Sulfamethazine0.999625–2502.16.081.41.188.81.386.01.478.22.385.42.582.61.45.793.9
Sulfamethizole0.999425–2502.56.661.61.365.01.762.41.362.01.865.42.062.82.25.668.6
Sulfamethoxazole1.000025–2501.13.092.01.798.61.992.61.898.21.995.02.990.81.8–1.896.8
Sulfamethoxypyridazine0.999725–2503.410.379.41.287.20.884.21.277.41.485.02.982.02.13.189.9
Sulfapyridine0.999525–2503.010.090.21.196.81.596.20.974.81.476.61.576.00.90.997.7
Sulfaquinoxaline0.990725–2503.310.071.21.075.81.776.21.170.41.370.02.470.42.46.080.3
Sulfathiazole0.997025–2503.09.386.81.186.61.587.01.588.41.288.21.988.61.7–3.184.5
Trimethoprim0.997550–2505.018.098.80.6101.21.698.22.292.01.393.03.195.04.2–0.9100.2
Stimulant
Caffeine0.999850–2503.310.685.21.0105.60.5110.80.795.01.1115.41.3118.81.0–0.2105.4
Analgesics
Paracetamol0.996225–2503.69.893.41.3110.21.0116.20.581.81.498.61.5104.61.1–15.892.8
Phenazone0.999825–2502.58.381.61.193.00.980.81.085.42.196.81.784.41.0–14.479.6
Anticonvulsants
Carbamazepine1.000025–2500.51.292.61.592.01.387.80.891.81.691.21.387.01.5–0.991.2
Carbamazepine-10.11-epoxide (M)0.994912.5–1251.54.580.01.683.23.984.01.277.41.380.42.283.24.8–8.376.3
Antidepressants
Citalopram0.999825–2500.72.162.61.881.61.096.01.062.01.688.61.582.81.618.196.4
Fluoxetine0.994412.5–2501.44.184.60.686.81.182.01.285.61.187.82.283.01.514.899.6
N-Desmethyl sertraline (M)0.994250–5003.18.562.01.865.42.668.80.961.83.264.02.664.41.8–0.967.8
Norfluoxetine (M)0.9925100–5002.26.064.61.769.81.271.61.666.61.764.82.066.41.7–14.160.0
O-Desmethyl venlafaxine0.996025–2500.82.077.01.4110.01.3101.01.074.41.9103.01.393.81.48.7119.6
Sertraline0.99872.5–5001.34.285.61.486.41.887.81.782.11.185.02.387.81.70.782.7
Venlafaxine0.998125–2500.31.568.01.298.81.391.01.169.21.2100.01.192.41.54.9103.7

RSDr repeatability relative standard deviation; RSDR reproducibility relative standard deviation