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. 2022 Aug 11;14(8):550. doi: 10.3390/toxins14080550

Table 1.

A comparison of the various conditions of the MMPB method protocols in scientific publications (modified after Anaraki et al. [87]). (n.s.: not specified; dw: dry weight).

References Matrix Quantity of Matrices Pre-Treatment Step Oxidation Length (Hour) [KMnO4] [NaIO3] or [NaIO4] pH End of Reaction Purification Method Detection Limits Instrumental Analysis Yield
Sano et al. [65] MC fraction from waterblooms (Microcystis viridis) 0.2–1 mg (dw) - 4 0.024 M 0.02 M n.s. 0.04 mL of 20% NaHSO₃ + 0.01 mL of 1OM H2SO4 5 mL of ethyl acetate pmol GC-FID/HPLC 84–98%
Williams et al. [60] Salmon Liver (Salmo salar) 220–1366 mg - overnight 36.1 µM 1.3852 mM 9 (120.8 µM of K2CO3) NaHSO₃ + 10% H2SO4 (pH~2) Diethyl ether 15 µg/g GC/MS 85–95%
Dungeness Crab Larvae (Cancer magister) 5.2–5.4 g n.s.
Williams et al. [71] Saltwater mussels, (Mytilus edulis) 5.5–8.3 g - n.s. 334.2 µM 12.3 mM 9 NaHSO₃ + 10% H2SO4 (pH ≈ 1–2 Diethyl ether 15 µg/g GC/MS n.s.
Pires et al. [93] Zebra mussels (Dreissena polymorpha) Pooled mussel material - overnight 0.1 M 0.4 M 9 H2SO4 (1 M), pH < 3 C18 (Supelco) n.s. LC/MS n.s.
Ott and Carmichael [72] Rat or chicken livers (species n.s.) 0.5–1 g - 3 0.02 M 0.02 M 9 (KHCO3) 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) 3 M Empore SDB-XC 7 mm/3 mL (Fischer Scientific, Hampton, NH, USA) 5 µg/g LC/MS 33.5%
Soares et al. [74] Human sera 0.4–1 mL - 3 0.02 M 0.02 M 9 (KHCO3) 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) 3 M Empore SDB-XC 7 mm/3 mL (Fischer Scientific) n.s LC/MS n.s.
Yuan et al. [75] Human Liver/sera n.s. - 3 0.02 M 0.02 M 9 (KHCO3) 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) 3 M Empore SDB-XC 7 mm/3 mL (Fischer Scientific) n.s. GC/MS n.s.
Hilborn et al. [73] Human blood n.s. - 3 0.02 M 0.02 M 9 (KHCO3) 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) 3M Empore SDB-XC 7 mm/3 mL (Fischer Scientific) n.s LC/MS n.s.
Nasri et al. [76] Terrapin (E. orbicularis; M. leprosa) 100 mg (dw) - 3 0.02 M 0.02 M 9 (KHCO3) 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) Conversion of MMPB to methyl ester using 12% trifluoroborate in MeOH n.s. GC/MS n.s.
Wu et al. [90] Aqueous solution spiked with MC-LR - - hours 50 mg/L 20 mg/L 1.6 NaHSO₃ - n.s. HPLC/DAD ~90%
Wu et al. [67] Cyanobacterial samples (Microcystis spp.) 10; 20; 40; 60; 80; 100 mg (dw) - 1–4 ≥0.05 M 0.2 M 9 (KHCO3) Saturated NaHSO₃ sol. - n.s LC/DAD 86.7%
Lance et al. [28], Neffling et al. [49] Tissues of snails (Lymnaea stagnalis) 10 mg (freeze-dried) Trypsin in Sörensen’s phosphate buffer (0.5 mg/mL, pH 7.5, 37 °C) 3 0.1 M 0.1 M 9 40% NaHSO₃ + 10% H2SO4 Oasis HLB 30 mg n.s. LC/MS 16–37%
Suchy and Berry [61] Rainbow Trout (Oncorhynchus mykiss) liver slurry (7 g in 5 mL of deionized water) 1 mL of liver slurry - 3 0.0035 M 0.09 M 9 0.5–1.5 g of NaHSO₃ + 10% H2SO4 (pH ≈ 2) Solid phase microextraction (PDMS-DVB fibre) 0.04 µg/g GC/MS n.s.
Wu et al. [69] Lake sediment 2 g (freeze dried) - 1–4 0.05 M 0.1 M 9 Saturated NaHSO₃ sol. Sep-pak C18 500 mg (Waters) n.s. HPLC/DAD 33-45%
Bieczynski et al. [81] Supernatants of liver and intestines from fish (Odontesthes hatcheri) 1 g - overnight 0.002 M 0.007 M 9 20% NaHSO₃ + drops of 10% H2SO4 Diethyl ether 0.2 ng GC/MS 67.25 ± 26%
Cadel-Six et al. [29] Rainbow trout (Oncorhynchus mykiss) Liver
Intestines
Gill
Filet
60 mg 100 mg
100 mg
100 mg (dw)
Trypsin in Sörensen’s phosphate buffer (0.5 mg/mL, pH 7.5, 37 °C) 4 0.1 M 0.1 M 9 40% NaHSO₃ + 10% H2SO4 (pH ≈ 1.5) SampliQ OPT 150 mg (Agilent) 2.59 ng/g
4.76 ng/g
2.86 ng/g
2.88 ng/g
LC/MS 17%
6%
12%
5%
Roy-Lachapelle et al. [66] River water n.s. - 1 0.05 M 0.05 M 9 (K2CO3) 40% NaHSO₃ + 10% H2SO4 (pH ≈ 2) Ethyl acetate 0.2 µg/L LDTD/APCI/MS 91%
Roy-Lachapelle et al. [79] Frozen homogenized fish tissue ((Osmerus mordax); (Mugil cephalus); (Salvelinus fontinalis); (Perca flavescens); (Sander vitreus); (Ameiurus nebulosus); (Coregonus clupeaformis)) 1 g 3 freeze-thaw lysis cycles + 2 h in NaOH (50 mM) 2 0.05 M 0.05 M 9 (HCl, 50 mM) Saturated NaHSO₃ sol. + 10% H2SO4 (pH ≈ 2) Filter the supernatants with 0.2 µM nylon filter (Whatman) + Strata SDB-L 500 mg (Phenomenex) 2.7 ng/g LDTD/APCI/HRMS 54–72%
Foss and Aubel [63] Raw and trated water from Ohio water sources n.s. 3 freeze-thaw cycles + 10/100x concentration (SPE) 0.5 0.015 M 0.015 M n.s. 40% NaHSO₃ + phosphate buffer to raise pH < 5 Strata X 100 mg (Phenomenex) 0.05 µg/L LC/MS n.s.
Wang et al. [68] Water
Sediment
0.1 mL
1 g
- 1 4 g/L 20 mg/L n.s. 40% NaHSO₃ (50 µL: water/0.5 mL: sediment) Sep-Pak cartridge (500 mg, 6 cm3) 125 ng/L
100 ng/g
HPLC/FLD 98–109%
Greer et al. [77] Tilapia (O. niloticus) filets, livers and eggs 50 mg (dw) - 2 0.1 M 0.1 M n.s. 40% NaHSO₃ + 10% H2SO4 (pH ≈ 2) Oasis PRiME 60 mg (Waters) n.s. UPLC/MS 55%
Munoz et al. [64] Surface Water 10 mL 3 freeze-thaw cycles + filtration (0.22 µM nylon filters) 1 0.35 M 0.4 M 9 (K2CO3, 1 M) NaHSO₃ (4 M) Filtration (0.22 µM nylon filters) + on-line SPE 0.5 ng/L LC/MS 65%
Roy-Lachapelle et al. [80] Algary dietary supplements 0.3 g - 2 0.05 M 0.05 M 9 (K2CO3) Saturated NaHSO₃ sol. + 10% H2SO4 (pH ≈ 2) Filtration (0.2 µM nylon filter, Whatman) + Strata SDB-L 500 mg (Phenomenex) 0.2 µg/g LDTD/APCI/HRMS 67–74%
Vudathala et al. [94] Liver and plasma from channel catfish (Ictalurus punctatus) <0.5 g/0.08–0.18 g - 3 0.002 M 0.002 M 9 (Na2CO3, 1 M) NaHSO₃ + 0.5 mL of concentrated H2SO4 (pH ≤ 2) Filtration (0.2 µM nylon filter, Whatman) + Oasis HLB 60 mg (Waters) 5.2–6.2 ng/g LC/MS 31%/21%
Brown et al. [78] Bottlenose dolphins liver (T. truncatus) n.s. - 2.5 0.1 M 0.1 M n.s. (K2CO3, 0.2 M) 40% NaHSO₃ Strata-X 200 mg (Phenomenex) 1.3 µg/g (dw) LC/MS 39%
Duncan et al. [88] Aqueous samples/Algal reference material suspensions n.s./25 mg (dw) in 200 mL of water - 1.5 0.025 M 0.009 M 9 (KHCO3, 0.5 M) 40% NaHSO₃ + HCl (6 M, pH ≈ 3) Semi-permeable
hydrophobic membrane (PDMS)
1 µg/L CP/MIMS n.s.
Foss et al. [59] Mallard duck (Anas platyrhynchos) liver 100 mg (dw) - 2 0.25 M 0.25 M KHCO3 (1 M) 40% NaHSO₃ + 50% H2SO4 (pH < 2) Ethyl acetate + Strata-X 200 mg (Phenomenex) n.s. LC/MS n.s.
Greer et al. [95] Porcine tissue 50 mg (dw) - 2 0.1 M 0.2 M n.s. 40% NaHSO3 + 10% H2SO4 Oasis PRiME HLB (Waters) n.s. UPLC/MS 83%
Foss et al. [86] Dogs (Canis lupus familiaris) Liver
Kidney
Hair
Blood
Bile
Urine
Vomit
100 mg
100 mg
50 mg (dw)
0.5–1.5 mL
0.2–500 µL
0.2–500 µL
10 mg
- 2 0.1 M 0.1 M (K2CO3, 0.2 M) 40% NaHSO₃ Strata-X 200 mg (Phenomenex) + filtration (PVDF; 0.2 µM; Sigma) 4 ng/g
4 ng/g
20 ng/g
0.2 ng/mL
50 ng/mL
0.2 ng/mL
n.s.
LC/MS 21%
12%
4%
28%
72%
42%
114%
Mohamed et al. [5] Nile tilapia
(Oreochromis niloticus) filet
n.s. As described in Neffling et al. [49] n-hexane n.s. LC/DAD n.s.
Anaraki et al. [87] Rainbow Trout
(O. mykiss) liver and filet
100 mg (dw) - 2 0.3 mM 0.02 M 8.5 NaHSO₃ + 10% H2SO4 (pH = 3) Oasis HLB 400 mg (Waters) + Pall GHP filters 7.28 ng/g LC/MS 30%
Bolotaolo et al. [70] Sediments/clams 1/0.1 g (dw) - 3 0.1 M 0.1 M 9 NaHSO₃ (1–1.5 g) + 10% H2SO4 (pH = 2) ENV-Bond Elut 100 mg (Agilent) + esterification 10/15 ng/g (dw) GC/MS 50%/46%
Lepoutre et al. [83] Mussels (A. anantina and D. polymorpha) Freeze-dried tissues Trypsin in Sörensen’s phosphate buffer (pH 7.5, 37 °C) 3 0.025 M 0.025 M 9 NaHSO₃ + 10% H2SO4 (pH < 3) SPE 60 mg (Waters) n.s. LC-MS/MS 32.9–58.8/36.5–57%