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43 protocols using lead 2 acetate trihydrate

1

Analytical Chemistry Reagents Protocol

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Sulfuric acid (Sigma-Aldrich Co., St. Louis, MO, USA, 95–97%), hydrochloric acid, sodium hydroxide, potassium chloride, sodium sulfate anhydrous, sodium bicarbonate, potassium sodium tartrate tetrahydrate, copper sulfate pentahydrate, lead (II) acetate trihydrate and lead (II) acetate trihydrate, acetone, and chloroform (Sigma-Aldrich Co., St. Louis, MO, USA, p.a.). Iron (III) sulfate hydrate (Sigma-Aldrich Co., St. Louis, MO, USA, ASC reagent). Potassium permanganate standard solution (Sigma-Aldrich Co., St. Louis, MO, USA, 0.02002 mol/L). Boric acid (AFT, Bratislava, Slovakia, p.a.); Kjeltabs (Velf Scientifica srl, Usmate, Italy). Petroleum ether (Sigma-Aldrich Co., St. Louis, MO, USA, b.p. 40–60 °C). Methanol (Sigma-Aldrich Co., St. Louis, MO, USA, HPLC grade). Sodium methoxide solution (Sigma-Aldrich Co., St. Louis, MO, USA, 25 wt% in Methanol). Hexane (Sigma-Aldrich Co., St. Louis, MO, USA, for pesticide residue analysis).
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2

Lead Exposure Effects on Human Epithelial Cells

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HMEECs (kindly provided by Dr. David J. Lim, House Ear Institutes, Los Angeles, CA, USA) established using human papillomavirus E6/E7 genes for the study of normal cell biology and pathological processes associated with development of OM were used. HMEECs were maintained in a mixture of Dulbecco's modified Eagle's medium (Invitrogen, Carlsbad, CA, USA) and bronchial epithelial basal medium (Lonza, Basel, Switzerland) (1 : 1) [14 (link)] and kept in an incubator with a humidified atmosphere at 37°C containing 95% air and 5% CO2. The growth medium was changed every third or fourth day. The doubling time of HMEECs is approximately 3 days, and cells were used for subsequent studies after 6 days. After approximately 1 week, the cells were stimulated with 10, 50, or 100 μg/mL lead(II) acetate trihydrate (Sigma, St. Louis, MO, USA) suspended in phosphate-buffered saline (PBS) for 24 h. As a control group, HMEECs were treated with only PBS without lead(II) acetate trihydrate.
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3

Synthesis of Lead Compounds

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Cesium carbonate (Aldrich,
99%), hydrobromic acid for analysis (Acros Organics, 48% solution
in water), and lead(II) acetate trihydrate (Aldrich, 99.999%) were
purchased and used without further purification. The water was purified
by double distillation.
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4

Synthesis of Lead Perovskite Nanocrystals

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All chemicals were used as received: Lead(II) acetate tri-hydrate (Aldrich, 99.999%), oleic acid (OA, Aldrich, 90%), nonanoic acid (Alfa Aesar, 97%), trioctylphosphine (TOP; ABCR, 97%), 1,2-diiodoethane (DIE; Aldrich, 99%), methylammonium bromide (MAB; Aldrich, 98%), methylammonium chloride (MAC; Aldrich, 98%), methylammonium iodide (MAI; Aldrich, 98%), diphenyl ether (DPE; Aldrich, 99%), toluene (VWR, 99,5%), dimethylformamide (DMF; Aldrich, 99,8%), 1bromotetradecane (BTD; Aldrich, 97%), 1-chlorotetradecane (CTD; Aldrich, 98%), octadecylamine (ODA; Aldrich, 97%), tetradecylamine (TDA; Aldrich, 95%), hexadecylamine (HDA; Aldrich, 90%), dodecylamine (DDA; Merck, 98%), oleylamine (ACROS, 80-90%).
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5

Synthesis of Lead Sulfide Nanoparticles

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All chemicals have been used as received. The chemicals used were: lead(II) acetate trihydrate (Aldrich, 99.999 %), thioacetamide (Sigma-Aldrich, >= 99.0 %), thiourea (Aldrich, >= 99.0 %), diphenyl ether (Aldrich, 99 %+), dimethyl formamide (Sigma-Aldrich, 99.8% anhydrous), oleic acid (Aldrich, 90 %), 1-chlorotetradecane (Aldrich, 98 %), 1-chloroheptane (Aldrich, 99 %), 1-fluorotetradecane (Lancaster, 98 %), 1-fluoroheptane (Aldrich, 98 %), 1-bromotetradecane (Aldrich, 97 %), 1-bromoheptan (Aldrich, 99 %), 1iododecane (Aldrich, 98 %), tetradecylamine (Aldrich, 95 %) and heptylamine (Aldrich,
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6

Synthesis of Lead-Selenium Nanoparticles

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All chemicals were of the highest purity available unless otherwise noted and were used as received. All solvents were anhydrous and were used as received. Lead(II) oxide, (PbO, 99.999%, Aldrich, Saint Louis, MO, USA), selenium powder ( 200 mesh, 99.999%, Alfa Aesar, Ward Hill, MA, USA), oleic acid (OA, 90%, Aldrich), squalene (90%, Aldrich), cadmium chloride (CdCl2, 99.9%, Aldrich), tris(diethylamino)-phosphine (TDP, 90%, Aldrich), oleyamine (90%, Aldrich), benzene 1,3-dithiol (BDT, 99%, Aldrich), tetrabutylammonium iodide (TBAI, 99% Aldrich), titanium (IV) isopropoxide (TTIP, 99.999%, Aldrich), tetrachloroethylene (TCE, 99%, Aldrich), n-methylformamide (DMF, 99%, Aldrich), lead (II) acetate trihydrate (PbOAc,99.99%, Aldrich), 1-Octadecene (ODE, 90%, Aldrich), trioctylphosphine (TOP, 90%, Aldrich), diphenylphosphine (DPP,98%,Aldrich), 1,2-ethanedithiol (EDT, 98%, Aldrich), acetone (99.8%, Acros Organics), methanol (99.8%, Aldrich), buthanol (99.8%, Aldrich), hexane (99%, Aldrich), 2-propanol (99.5%, Aldrich), acetonitrile, (99.8%, Aldrich), octane (99%, Aldrich), tetradecylphosphonic acid (TDPA, 98%, Alfa Aeasar).
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7

Synthesis of Lead Sulfide Nanocrystals

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Lead(II) acetate trihydrate (PbAc2·3H2O, ≥ 99.99%, Aldrich), bis(trimethylsilyl)sulfide
(TMS2S, Aldrich), 1-octadecene (ODE, 90%, Aldrich), oleic
acid (OA, 90%, Aldrich), ethanol (Fluka), hexane (Aldrich), chloroform
(Aldrich), and methanol (Aldrich) were used as received.
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8

Synthesis of Oleate-Capped PbS Colloidal Quantum Dots

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Lead(II) acetate trihydrate (≥99.99%,
Aldrich), bis(trimethylsilyl)sulfide (Aldrich), 1-octadecene (ODE,
90%, Aldrich), oleic acid (90%, Aldrich), ethanol (Fluka), hexane
(Aldrich), and tetrachloroethylene (99%, Aldrich) were used as received.
PbS CQDs capped with oleate ligands were synthesized as described
elsewhere with slight modifications.5 (link) A
1.5 g amount of Lead(II) acetate trihydrate was dissolved in a mixture
of 47.2 mL of ODE and 2.8 mL of oleic acid. This solution was dried
for 1 h under vacuum at 120 °C in a three-neck flask using a
Schlenk line. Further reaction was carried out under an argon atmosphere.
The lead precursor solution was cooled to 85 °C, the heating
mantle was removed, and a solution of 0.420 mL of bis(trimethylsilyl)sulfide
in 10 mL of dried ODE was quickly injected. Two minutes later the
reaction was quenched using a cold water bath. CQDs were purified
three times by washing with a hexane/ethanol mixture. Finally, PbS
CQDs were redispersed in anhydrous hexane, filtered through a 450
μm PTFE filter, and stored under an inert atmosphere. Solution
concentrations were determined by the measurement of the absorption
of diluted solutions at 400 nm.
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9

Synthesis of Inorganic Nanoparticles

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Lead(II) acetate trihydrate (99.999%, Sigma-Aldrich),
cesium acetate (99.99%, Sigma-Aldrich), benzoyl chloride (Bz-Cl, 99%,
Sigma-Aldrich), benzoyl bromide (Bz-Br, 97%, Sigma-Aldrich), sodium
iodide (99.5%, Sigma-Aldrich), decane (anhydrous, ≥99%, Sigma-Aldrich),
oleylamine (technical grade, 70%, Sigma-Aldrich), oleic acid (technical
grade, 90%, Sigma-Aldrich), octylamine (99%, Sigma-Aldrich), erucic
acid (analytical standard, ≥99.0%, Sigma-Aldrich Supelco),
hexane (puriss. p.a., ACS reagent, Sigma-Aldrich), ethyl acetate (puriss.
p.a., ACS reagent, Sigma-Aldrich). All chemicals were used without
further purification.
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10

Optimizing Perovskite Thin Film Deposition

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Lead(II) acetate trihydrate (Sigma-Aldrich, 99.99%) is dehydrated before use. Then, the dehydrated lead acetate (Pb(Ac)2) and MAI (Dyesol, 99%+) are dissolved in dimethylformamide (N,N-dimethylformamide, Sigma-Aldrich, 99.9%) with the molar ratio 1:3 to form the perovskite precursor solution. To obtain ultrathin films and thick films, we tune the perovskite concentration between 0.2 and 1 mM. For hybrid solid, PCBM (Nano-C, 99.5%) is mixed into the perovskite solution. In typical procedure, the PCBM-perovskite weight ratios are between 1:100 and 1:10. Specifically, PCBM can be dissolved into chlorobenzene first, and then mixed with perovskite solution before spin-coating. The solution is kept at 70 °C before spinning. For low mixture ratio, the miscibility of mixture solution is good and can be stabilized at room temperature; for high-ratio mixtures approaching 1:10 and beyond, the solution needs to be used quickly after mixing.
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