Resumes
Resumes
Mohammed Berigari Phones & Addresses
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5733 Nordeen Oak Ct, Burke, VA 22015 (703) 543-4414
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10520 Oak Bluff Ct, Burke, VA 22015 (703) 426-0531
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Norge, VA
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Fairfax, VA
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5733 Nordeen Oak Ct, Burke, VA 22015 (703) 426-0531
Work
Position:
Production Occupations
Education
Degree:
Associate degree or higher
Publications
Us Patents
Gypsum Determination In Soils By Conversion To Water-Soluble Sodium Sulfate
View pageUS Patent:
55959148, Jan 21, 1997
Filed:
Oct 23, 1995
Appl. No.:
8/547013
Inventors:
Mohammed S. Berigari - Burke VA
International Classification:
G01N 100
US Classification:
436177
Abstract:
Precise and accurate determination of gypsum in soils has been difficult, laborious and time consuming by currently available methods. The present invention solves such problems by: 1) Direct removal of nongypsic sulfate from 2-g soil sample with 25-mL portion of 50-% (v/v) ethanol, thus, eliminating positive errors in gypsum measurement from sulfate analysis while causing essentially no loss in gypsum content of the sample, and 2) stoichiometric conversion of soil gypsum to Na. sub. 2 SO. sub. 4 and CaCO. sub. 3 (s) by two equlibrations of the soil sediment with 25-mL increments of 0. 5M Na. sub. 2 CO. sub. 3 solution plus 30-s sonification. The SO. sub. 4 in the supernatent solution is centrifuge separated, analyzed by the standard BaSO. sub. 4 gravimetric and turbidimetric methods, and gypsum content is computed from equation [8]: gypsum(g)/soil(kg)=[SO. sub. 4 (g) /soil(kg)(172/96.