Mineral Oil Extraction of Light Filth from Rubbed Sage: Collaborative Study

1978 ◽  
Vol 61 (4) ◽  
pp. 906-907
Author(s):  
Naoma Doris Holtgreve
Keyword(s):  
Collaborative Study ◽  
Mineral Oil ◽  
Oil Extraction ◽  
Improved Method

Abstract An improved method has been developed for extracting light filth in rubbed sage. The method is similar to 44.A04 and 44.A05, except the light filth is isolated by using 20% isopropanol with mineral oil. Collaborative results show that the proposed method yielded better recoveries than the present official first action method. The method has been adopted as official first action.

Collaborative Study of a Method for the Extraction of Light Filth from Whole, Cracked, or Flaked and Ground Spices

1975 ◽  
Vol 58 (3) ◽  
pp. 447-450
Author(s):  
Larry E Glaze
Keyword(s):  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Mustard Seed ◽  
Improved Method ◽  
Action Methods

Abstract An improved method has been developed for the extraction of light filth from whole, cracked, or flaked spices (basil, bay leaves, celery leaves, chervil, chives, dill weed, mint flakes, parsley, rosemary, sage, tarragon, thyme, and vegetable flakes) and from ground spices (cloves, cumin, marjoram, mustard seed, oregano, sage, and thyme). The method involves a chloroform or isopropanol defatting, followed by a direct flotation from 40% isopropanol with Tween 80-EDTA (1+1) and mineral oil-heptane (85+15). Collaborative results show that the proposed method is more rapid to perform and yields better filth recoveries than the official first action methods for ground spices, 44.116, and whole, cracked, or flaked spices, 44.129. The method has been adopted as official first action.

Collaborative Study of a Method for the Extraction of Light Filth from Canned Fish

1972 ◽  
Vol 55 (1) ◽  
pp. 69-70
Author(s):  
Russell G Dent
Keyword(s):  
Aqueous Phase ◽  
Collaborative Study ◽  
Mineral Oil ◽  
Oil Extraction ◽  
Acid Digestion ◽  
Canned Fish ◽  
Filter Papers

Abstract Collaborative results are presented for a method proposed for light filth extraction from canned fish packed in water, oil, or vegetable sauces. The method utilizes an acid digestion and a hot mineral oil extraction from an aqueous phase in a Corning percolator. Recoveries are reproducible and filter papers are relatively clean. This method is recommended for adoption as official first action to replace procedure 40.064.

Collaborative Study of a Modified Method for the Extraction of Light Filth from Ground White Pepper, Cardamom, Celery Seed, Coriander, and Ginger

1977 ◽  
Vol 60 (1) ◽  
pp. 117-121
Author(s):  
Russell G Dent
Keyword(s):  
Collaborative Study ◽  
Mineral Oil ◽  
Improved Method ◽  
White Pepper ◽  
Modified Method ◽  
Celery Seed ◽  
Action Methods ◽  
Wet Sieving

Abstract An improved method has been developed for the extraction of light filth from 5 ground spices, ginger, white pepper, coriander, celery seed, and cardamom. The method, a modification of 44.120, utilizes a cold isopropanol defatting, followed by wet sieving and flotation of light filth from 40% isopropanol with HCl and mineral oil-heptane (85+15). Collaborative results show that the proposed method is more rapid to perform than the present official first action methods, 44.116 and 44.120, and yields better recoveries. The method has been adopted as official first action.

Oil Flotation Extraction of Light Filth from Ground Capsicums Excluding Paprika: Collaborative Study

1978 ◽  
Vol 61 (4) ◽  
pp. 900-902
Author(s):  
Joel J Thrasher ◽  
Emma Jean Colliflower
Keyword(s):  
Collaborative Study ◽  
Fold Increase ◽  
Mineral Oil ◽  
Improved Method ◽  
Coefficients Of Variation ◽  
Filter Papers ◽  
Collaborative Tests ◽  
Wet Sieving

Abstract A collaborative study has been completed on an improved method for the isolation of light filth from ground capsicums other than paprika. The proposed method involves isopropanol pretreatment, wet-sieving, and extraction from cooled 6 0% ethanol with a mineral oil-heptane mixture. The collaborative tests by the proposed method showed an approximate 2-fold increase in recoveries of insect fragments and rodent hairs with acceptable coefficients of variation and clean filter papers. The proposed method has been adopted as official first action to replace 44.123.

Collaborative Study of a Method for the Extraction of Light Filth from Ground Turmeric

1975 ◽  
Vol 58 (3) ◽  
pp. 451-452
Author(s):  
Larry E Glaze
Keyword(s):  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Improved Method

Abstract An improved method has been developed for the extraction of light filth from ground turmeric. The method involves an isopropanol defatting followed by a direct flotation from 40% isopropanol with Tween 80-EDTA (1+1) and hot mineral oil. Collaborative results show that the method is rapid and yields better filth recoveries than the official first action method, 44.118. The method has been adopted as official first action to replace 44.118.

Extraction of Light Filth from Ground Allspice: Collaborative Study

1980 ◽  
Vol 63 (6) ◽  
pp. 1266-1268
Author(s):  
Russell G Dent ◽  
◽  
J G Eye ◽  
C C Freeman ◽  
E Hall ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Improved Method ◽  
Aoac Method ◽  
Light Mineral ◽  
Wet Sieving

Abstract The present official AOAC method (44.120(a)(b), 13th Ed.) for extracting light filth from ground allspice uses flammable solvents and gives poor filth recoveries. An improved method has been developed which uses a single pretreatment with 40% isopropanol and hydrochloric acid, followed by wet sieving. After deaeration by boiling, the light filth is extracted from 40% isopropanol-Tween 80-tetrasodium EDTA with light mineral oil. Reports from all 6 collaborators showed that the proposed method resulted in 90 and 89% average recoveries of rodent hairs and insect fragments, respectively. The proposed method is recommended for adoption as official first action to replace AOAC (44.120(a)(b)) for allspice.

Collaborative Study of an Acid Autoclave Method for Mineral Oil Extraction of Light Filth from Spaghetti and Macaroni

1969 ◽  
Vol 52 (3) ◽  
pp. 463-465
Author(s):  
Joel J Thrasher
Keyword(s):  
Collaborative Study ◽  
Mineral Oil ◽  
Oil Extraction ◽  
New Method ◽  
Official Method ◽  
Plain Weave ◽  
Filter Papers ◽  
Wet Sieving ◽  
Better Than

Abstract A method for the extraction of light filth from alimentary pastes based on rapid autoclaving of acidified samples, wet sieving on a No. 230 plain weave sieve, and heating the sieve retainings in an acidic mineral oil mixture is described. This new method is faster and results in higher and more reproducible recoveries than method 36.025. Recoveries were equal or better than those achieved by the official method, and the filter papers were cleaner.

Extraction of Light Filth from Unground Marjoram: Collaborative Study

1985 ◽  
Vol 68 (5) ◽  
pp. 899-901
Author(s):  
Russell G Dent ◽  
Larry Glaze
Keyword(s):  
Microscopic Examination ◽  
Present Method ◽  
Plant Material ◽  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Oil Extraction ◽  
Official Method ◽  
Test Portion ◽  
Examination Time

Abstract Ihe present method for filth in unground marjoram is conducted in 2 parts. The first of these, which is for heavy filth and sand, requires the spice to be boiled with petroleum ether, then floated off with chloroform and, if needed, carbon tetrachloride. The second part, which is for light filth, is dependent on completion of the heavy filth section. After the spice is air-dried, the light filth is extracted with heptane and water. The proposed method was developed to make light filth independent of heavy filth analysis, improve filth recoveries, and reduce microscopic examination time. The light filth is extracted by ethanol defatting followed by a combination 15-60% ethanol/mineral oil extraction in a Wildman trap flask. Tween 80-NaEDTA solution is added to the trapping system to reduce the rising of excess plant material to the trap interface. The official method (AOAC 13th edition sees 44.142,44.120(b)) produced an average of 8 extraction papers per test portion and microscopic examination took an average of 88 min per test portion. The official method gave average recoveries of 14% for rodent hairs and 26% for insect fragments with 2 spike levels of 15 and 30 for each filth element. Recoveries of the 2 levels of each spike were not significantly different (P > 0.05). The proposed method gave average recoveries of 73% for rodent hairs and 70% for insect fragments. The proposed method has been adopted official first action to replace AOAC 13th edition sees 44.142 and 44.120(b) for unground marjoram only

Mineral Oil Extraction of Light Filth from Rubbed Sage Collaborative Study

1979 ◽  
Vol 62 (3) ◽  
pp. 597-599
Author(s):  
Emma J Colliflower ◽  
Joel J Thrasher
Keyword(s):  
Plant Material ◽  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Oil Extraction ◽  
New Method ◽  
Filter Papers

Abstract The official methods for extracting light filth from rubbed sage, 44.D08–44.D10, specifies a hot isopropanol pretreatment and flotation from cooled dilute isopropanol with mineral oil to extract light filth. The method gives good recoveries, but occasionally excessive interfering plant material is extracted along with the filth elements. A new method has been developed in which chloroform is used for pretreatment instead of isopropanol, and Tween 80-EDTA is added twice rather than once. This method has given consistently cleaner filter papers and better recoveries for rodent hairs, 85 vs. 79%, and for elytral squares, 95 vs. 84%. The new method has been adopted as official first action.

Determination of Internal Insect Infestation of Oats: Collaborative Study

1985 ◽  
Vol 68 (4) ◽  
pp. 699-700
Author(s):  
Richard L Trauba
Keyword(s):  
Collaborative Study ◽  
Tween 80 ◽  
Mineral Oil ◽  
Insect Infestation ◽  
Improved Method ◽  
Adult Insect ◽  
Light Mineral ◽  
Hydrolysis Of ◽  
Wet Sieving

Abstract An improved method has been developed for determining internal insect infestation of oat kennels. The method involves alcohol defatting and acid hydrolysis of the cracked oats, wet sieving to remove the acid, transfer to a 2 L Wildman trap flask, deaeration by boiling, and treatment with Tween 80-Na.tEDTA. Insects are extracted with light mineral oil. Reports from 6 collaborators showed that recoveries averaged 88.98% for adult insect heads and 97.22% for larvae. The method has been adopted official first action.

Sign in / Sign up

Export Citation Format

Share Document