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다이클로로메테인
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1
Encyclopaedia of Occupational Health and Safety: Guides, ...
Dichloromethane (methylene chloride) is highly volatile, and high atmospheric concentrations may develop in poorly ventilated areas, producing loss of consciousness in exposed workers. The substance does, however, have a sweetish ...
Jeanne Mager Stellman,
1998
2
Food Chemicals Codex - 269페이지
dichloromethane. Rinse the condenser with 50 mL of dichloro- methane, and collect the rinsing directly into the separatory funnel containing the distillate and potassium hydroxide. Extract the distillate with dichloromethane by shaking the ...
Institute of Medicine (U.S.). Committee on Food Chemicals Codex,
2003
3
Technology and Solvents for Extracting Oilseeds and ... - 27페이지
Dichloromethane (methylene chloride) has been used to prepare hops extracts used by the brewing industry in making beer. Coffee has been decaffeinated with dichloromethane and trichloromethylene. Dichloromethane has a high solubility ...
Peter J. Wan, Phillip J. Wakelyn,
1997
4
Chromatographic Analysis of Environmental and Food Toxicants
... carbon on silica gel ,eactivated basic alumina Silica gel, acid- & base-alumina silver nitrate/ silica gel Silica gel, basic alumina, charcoal: CharbopaP C on Celite 545 Pa2S04, silica gel, Celite-H2S04 20% dichloromethane in hexane 54 with ...
5
Comprehensive Analytical Profiles of Important Pesticides - 186페이지
Add 75 ml of sodium chloride solution. Extract twice with l00-ml portions of hexane; discard the hexane. Extract the aqueous phase three times with 80-ml portions of dichloromethane. Filter the dichloromethane extracts through sodium sulfate ...
Joseph Sherma, Thomas Cairns,
1992
6
Introduction to Organic Laboratory Techniques: A Small ... - 535페이지
Extract the aqueous layer with 30 mL of dichloromethane and add the extract to the organic layer saved earlier. Wash the combined organic layers with 50 mL of saturated sodium bicarbonate solution. If a significant amount of acid is present, ...
7
Analytical Chemistry of PCBs, Second Edition - 216페이지
A mixed dichloromethane/cyclohexane solvent was used to elute polar compounds such as chlorophenols along with the PCBs and organochlorine pesticides (Kuehl and Leonard, 1978). Retention volumes and recovery studies for the polar ...
Mitchell D. Erickson,
1997
8
Chlorinated Organic Compounds in the Environment: ... - 42페이지
Dichloromethane (Methylene Dichloride) Air Dichloromethane Levels in Air Dichloromethane has been detected in surface-water, groundwater, and finished drinking-water. It was detected in 30% of 8,917 surface-water samples at 0.1 (ig/L ...
Sub Ramamoorthy, Sita Ramamoorthy,
1997
9
Organotin: Environmental fate and effects - 117페이지
Six milliliters of dichloromethane is then added, the funnel is capped and shaken by hand for ~30 s and vented. The funnel is then secured to the wrist action shaker and shaken (240 stroke min") for 10 min. After shaking, the layers are allowed ...
M.A. Champ, Peter F. Seligman,
2012
10
Handbook of Food Analysis: Residues and other food ... - 1221페이지
Cabbage Acetone Fruits, Acetone vegetables, and plant foodstuffs Tomato Acetone concentrate Vegetables Acetone Hexane/ dichloromethane Dichloromethane NaCl/water Dichloromethane Fruits and vegetables Fruits and pears Cereals ...