Briefly, 20 g of homogenised inner core soil was suspended in acetonitrile
(25 mL) and shaken for 1 h before being allowed to settle.
At the beginning, methanol was investigated as an organic solvent, instead of acetonitrile
. Better peak shape and shorter retention time were achieved using acetonitrile
Reagent grade nitrate salts of silver, cadmium, zinc, chrome, cobalt, mercury, copper, manganese, nickel, iron, Lead and dried acetonitrile
([H.sub.2]O < 0.005%) (All from Merck) were of the highest purity available and used as received.
Antibacterial activity of Fe doped titanium oxides synthesized in various solvents: The antibacterial activity of Fe doped titanium oxides which were synthesized in various solvents such as acetonitrile
, n-hexane and isopropyl alcohol was investigated against all strains S.
Entry Catalyst Amount of Styrene catalyst (g) conversion 1 Without -- 1 2 C1 0.02 5 3 C2 0.02 30 4 C3 0.02 25 5 C4 0.02 61 6 C5 0.02 75 7 C6 0.02 80 8 C4 0.005 30 9 C4 0.01 50 10 C4 0.015 53 Yield (a) (% mol) Entry Benzaldehyde Acetophenone 1 1 0 2 5 0 3 30 0 4 25 0 5 58 3 6 45 33 7 48 16 8 30 0 9 50 0 10 53 0 Reaction conditions: [H.sub.2][O.sub.2]/styrene, 1; temperature, 80[degrees]C; solvent, acetonitrile
; reaction time, 24 h; (a) yields determined by GC using dodecane as an internal standard.
The addition of tetra-butylammonium salts (TBAX: X=F, Cl, [H.sub.2]P[O.sub.4], CN, AcO, and Cl[O.sub.4]) to solutions of compounds 1-4 in acetonitrile
results in changes in both absorption and fluorescence spectra (Figures 4 and 5, Table 2).
Si-NPs were successfully prepared by chemical etching method and suspended in various solvents to investigate the impact of solvents (DMSO, DMF, ethanol, benzene, hexane, C[Cl.sub.4], chloroform, acetonitrile
, etc.) on optical properties of Si-NPs.
The pretreated samples were mixed with 15 mL of 1% TCA and 2 mL of acetonitrile
, and then 10 mL of ethyl acetate was added.
Although several matrix-specific methods are reported here, it is noteworthy that a simple, modular QuEChERS method was developed for analyzing pesticides in animal products with various contents of fat, attaining adequate recoveries that could make it a good option for routine sample screening; this method involved extraction of the sample in acetonitrile
, followed by hexane extraction in the presence of a QuEChERS salt and cleanup by SPE ([C.sub.18]) .
HPLC-grade methanol, acetonitrile
, hexane, and pesticide-grade ethyl acetate were purchased from Tedia (Rio de Janeiro, Brazil), while HPLC-grade dichloromethane was from Merck (Darmstadt, Germany).
The mixture containing KOH buffer: Acetonitrile
= (60: 40 v/v) was chosen as Mobile Phase.
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