Comparison of AACC and AOAC Methods for Extraneous Materials in Flour

Abstract Recovery of extraneous materials in flour by the AACC acid hydrolysis method is equal and perhaps superior to that obtained from the AOAC method (36.025(a)). There is no appreciable difference between the results obtained with the Wildman trap flask or a separatory funnel, although the latter requires less specialized technique. The.Kilborn funnel and the soil percolator have been found satisfactory. The AACC method is considerably less time-consuming and thus more suited to routine control procedure, is more easily standardized, and results in filter papers that are clean and easy to examine.

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Rapid Method for Separation of Extraneous Materials from Whole and Degerminated Corn Meal, Prepared Mustard, and Soy Flour

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/50.3.505 ◽

1967 ◽

Vol 50 (3) ◽

pp. 505-509

Author(s):

Mary T Miller

Keyword(s):

Acid Hydrolysis ◽

Rapid Method ◽

Chloride Solution ◽

Collaborative Study ◽

Mineral Oil ◽

Soy Flour ◽

Corn Meal ◽

Hydrolysis Method ◽

Separatory Funnel ◽

Time Required

Abstract A rapid method, based on acid hydrolysis in the presence of mineral oil, has been developed to separate extraneous materials from whole and degerminated corn meal, prepared mustard, and soy flour. Corn meal may be first examined for rodent excreta by method 36.032 and then examined for light filth, or it may be analyzed directly for light filth by the acid hydrolysis method. Soy flour is prepared for analysis by solubilizing the protein in dilute sodium chloride solution in the presence of mineral oil. The Kilborn separatory funnel is used with all 3 products. The proposed method improves recoveries of insect fragments by 13—34% and rodent hair recoveries hy 25—54%. Analyst time required for actual assay is reduced by at least onethird. The method will be subjected to collaborative study

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Extraneous Materials in Flour

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/48.3.553 ◽

1965 ◽

Vol 48 (3) ◽

pp. 553-553

Author(s):

Garland L Reed

Keyword(s):

Acid Hydrolysis ◽

Hydrolysis Method ◽

Collaborative Studies ◽

Aoac Method

Abstract Collaborative studies are planned on the AACC acid hydrolysis method for extraneous materials in flour. This proposed method appears equal to AOAC method 36.025 (a) and provides some advantages over it.

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Collaborative Study of the Determination of Fat in Intermediate Moisture Pet Foods

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/59.6.1218 ◽

1976 ◽

Vol 59 (6) ◽

pp. 1218-1223

Author(s):

Gustav O Kuhn

Keyword(s):

Petroleum Ether ◽

Acid Hydrolysis ◽

Cross Section ◽

Collaborative Study ◽

Pet Food ◽

Petroleum Ether Extraction ◽

Hydrolysis Method ◽

Ether Extraction ◽

Aoac Method

Abstract Four different semimoist pet food formulations representing a cross section of commercial products were studied collaboratively for fat content by 2 methods. Ten laboratories participated in the study. Direct petroleum ether extraction by AOAC method 7.045 yielded low and variable fat recovery. AOAC acid hydrolysis method 7.047 for fat in baked dog foods was satisfactory for semimoist pet foods. The method, with some editorial changes, was adopted as official first action for this type of pet food.

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Improvements in the Acid-Hydrolysis Method of Determining the Crystallinity of Cellulose

Textile Research Journal ◽

10.1177/004051754801800302 ◽

1948 ◽

Vol 18 (3) ◽

pp. 149-154 ◽

Cited By ~ 20

Author(s):

Mary L. Nelson ◽

Carl M. Conrad

Keyword(s):

Acid Hydrolysis ◽

Hydrolysis Method

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Preparation of κ-carra-oligosaccharides with microwave assisted acid hydrolysis method

Journal of Ocean University of China ◽

10.1007/s11802-015-2409-3 ◽

2015 ◽

Vol 14 (2) ◽

pp. 345-349 ◽

Cited By ~ 3

Author(s):

Guangsheng Li ◽

Xia Zhao ◽

Youjing Lv ◽

Miaomiao Li ◽

Guangli Yu

Keyword(s):

Acid Hydrolysis ◽

Hydrolysis Method ◽

Microwave Assisted

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Extraction of Light Filth from Tea: Collaborative Study

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/64.2.287 ◽

1981 ◽

Vol 64 (2) ◽

pp. 287-290

Author(s):

Faith F Lim ◽

◽

J Barnett ◽

A Bright ◽

M P Chaput ◽

...

Keyword(s):

Sample Preparation ◽

Collaborative Study ◽

Tween 80 ◽

Mineral Oil ◽

Plant Residue ◽

Official Method ◽

Existing Problems ◽

Aoac Method ◽

Filter Papers ◽

Wet Sieving

Abstract The present AOAC method for determining insect and rodent filth in tea is time-consuming because it produces filter papers which are heavy in plant residue and therefore requires long paper-reading times. Anew method for the analysis of light filth in tea was developed to remedy existing problems and to improve recoveries. The method consists of the following steps: sample preparation, wet sieving, dilution with 40% isopropanol, extraction with Tween 80-Na4EDTA-40% isopropanol, flotation with mineral oil-heptane, and trapping off in a Wildman trap flask. In an interlaboratory collaborative study, analysts reported combined insect fragment recoveries of 99.2% for the proposed method and 93.0% for the AOAC method; the same analysts recorded combined rodent hair recoveries of 92.2% for the proposed method and 47.6% for the official method. Average times for reading individual subsamples were 9 min for the proposed method and 27 min for the AOAC method. The proposed method has been adopted official first action.

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Biobutanol Production from Bagasse Using Ammonia Pre-treatment and Acid Hydrolysis Method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/543/1/012053 ◽

2019 ◽

Vol 543 ◽

pp. 012053

Author(s):

A M Jannah ◽

D U Amalia ◽

N S Hana

Keyword(s):

Acid Hydrolysis ◽

Hydrolysis Method ◽

Pre Treatment

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Total Solids and Ether Extract in Fish and Other Marine Products

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/46.4.746 ◽

1963 ◽

Vol 46 (4) ◽

pp. 746-748

Author(s):

H M Risley

Keyword(s):

Acid Hydrolysis ◽

Ether Extract ◽

Total Solids ◽

Hydrolysis Method ◽

Canned Fish ◽

Marine Products ◽

Frozen Fish

Abstract The first action modified Babcock method for crude fat in canned fish, 18.013, was studied collaboratively on 2 samples of canned fish and 2 samples of frozen fish. The results were compared with those by the official acid hydrolysis method, 18.012. Nine analysts, representing 5 different laboratories, cooperated in the study. The results show that the modified Babcock method has about the same degree of reliability as the acid hydrolysis method. It was recommended that the method be made official, after some slight changes in the wording.

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