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. 2020 Dec 4;9(1):A0092. doi: 10.5702/massspectrometry.A0092

Table 2. Solutions and solvents for sample extraction for PESI, dPESI, sfPESI and ad-sfPESI.

Method Sample Solvent for extraction Reference
PESI
(+) 10−5 M gramicidin S+melittin in H2O 11
10−4 M cytochrome c+gramicidin S +10−2M AcONH4 in H2O
10−4 M cytochrome c +10−2M AcOH in H2O
10−5 M insulin +0.1%TFA in H2O
0.2 g/L PEG 2000+10−3 M NaCl inH2O
Soft drink
(+) 10−5 M gramicidin S+10−2M AcONH4 in H2O 24
10−6M gramicidin S+10−2M AcONH4 in H2O
10−6M gramicidin S+0.1% AcOH in H2O
10−5 bovine insulin +0.1% AcOH in H2O
(+) human milk, cow’s milk, beer, banana, onion, mouse brain, flower petal 48
(+) mouse urine, serum, homogenized liver 23
(+) tulip bulb, tulip petal 41
(+) 4.8×10−5 M myoglobin+glacial AcOH in H2O/MeOH(75/25) 32
10−5 M gramicidin S in H2O/MeOH/AcOH(1/1/0.0025)+D2O/CH3OD
10−2 M benzaldehyde in H2O/MeOH(3/7)+10−1 M ethanolamine in H2O/MeOH(3/7)
(+) 10−5M gramicidin S+1% AcOH +1 M NaCl in MeOH/H2O(25/75) 12
10−5M myoglobin +0–4 M urea in MeOH/H2O(25/75)
10−5M myoglobin +5–500 mM NaCl in MeOH/H2O(25/75)
10−5M myoglobin +5–500 mM K3PO4 in MeOH/H2O(25/75)
10−5M gramicidin S+0–1 M K3PO4 in MeOH/H2O(25/75)
(+) 10−3 M Triton X100+10−5 M cytochrome c in H2O/MeOH/AcOH(74/25/1) 13
1.5×10−2 M NaCl +10−5 M insulin in H2O/MeOH/AcOH (74/25/1)
10−5 M cytochrome c +10−5 M L-α-phosphatidylcholin (egg yolk) in H2O/MeOH/AcOH (74/25/1)
human breast cancer 10 μL H2O/MeOH/AcOH (50/50/1) dropped on the tissue
(+) 10−5 M gramicidin S+1 M NaCl in H2O/MeOH/AcOH(75/25/1) 49
10−5 M gramicidin S+1 M phosphate buffer in H2O/MeOH/AcOH(75/25/1)
10−5 M myoglobin +250 mM NaCl in H2O/MeOH/AcOH(75/25/1)
10−5 M myoglobin +4 M urea in H2O/MeOH/AcOH(75/25/1)
10−5 M myoglobin +250 mM phosphate buffer in H2O/MeOH/AcOH(75/25/1)
(+) clear cell renal cellcarcinoma (homogenized in 0.9% aqueous NaCl) 34
(+, −) 10−4 rhenium organo metalics in MeOH 50
(+) illicit drugs in urine, oral fluid, plasma 51
(+) 0.4 M copper(II)+3.0 M lactate +3.7 M NaOH in H2O 28
(−) 10−5 M insulin, cytocrome c, ubiquitin in H2O/2-PrOH(1/1) 52
10−6 M angiotensin II, 5´10−6 M angiotensin I, gramicidin S, Asp-Asp-Asp-Asp,
5×10−6 M angiotensin I, gramicidin S, Lys-Lys-Lys-Lys-Lys, substance P,
in H2O/2-PrOH(1/1)
10 ppm L-α-phosphatidylinositol, 1,2-diacyl-sn-glycero-3-phospho-L-serine
in H2O/2-PrOH(1/1)
cancerous human colon 10 μL H2O/2-PrOH dropped on the tissue
(+) 5×10−5 M cholesterol +10−5 M cytochrome c in H2O/MeOH/FA(1/1/0.001) 53
(+) sobean, walnut 10 μL H2O/MeOH dropped on the surface 54
(+) mouse brain (imaging) 160°C H2O or H2O/MeCN(7/3) vapor 30
(+) liver of control/steatotic mice 160°C chloroform/MeOH (7/3) vapor 33
(+) pepsin/tripsin +10−5 M cytochrome c in H2O (pH=1–8) 120°C H2OMeCN(1/1) vapor 31
(+) normal/cancer kidney 150°C H2O/MeCN(1/1) vapor 55
(+) single cell (rhodendron petal, soybean sprout) H2O/MeCN(1/1) micro droplets, piezo inkjet generator 39
dPESI
(+) tomato, spinach, onion, salmon flesh, cow’s milk, yogurt, soybean milk H2O/MeOH(1/1) 14
sfPESI
(+) tablets, bill, fruits, potato, narcotics, 100 pg–100 ng for codeine (linear relation) MeOH 56
(+) acephate, chlothianidin, acetamiprid, thiophanate-methyl on living plants H2O/MeCN/FA(1/1/0.001) 57
(+) ball point pen, coffee powder, tablets, rice grain, narcotics, dried rhodamine B H2O/MeOH/MeCN(1/1/1) 15
(+) fresh blood, saliva and urine, dried blood H2O/EtOH(1/1) 58
(+) strawberry, browning apple, onion (scales, root, leaf) H2O/MeOH(1/1) 46
(+) (robotic) commercial vegetable, orange and refreshing drink prepared in a multiwell plate H2O/MeOH(1/1) 47
ad-sfPESI
(+) apple, strawberry, tomato (leaf, stem, premature, ripened), camellia, sweet potato, apricot (premature, ripened, seed), orange (oil gland, juice), potato (sprout, flesh, leaf) H2O/MeOH(1/1) 16

AcOH: acetic acid, TFA: trifluoroacetic acid, AcONH4: ammonium acetate, MeOH: methanol, EtOH: ethanol, 2-PrOH: 2-propanol, MeCN: acetonitrile, FA: formic acid, (+): positive mode, (−): negative mode.