Hexane Extraction of Meat Meal for Peroxide Value Titrimetric Analysis

2021 ◽  
Author(s):  
Amanda Trainer
Keyword(s):  
Peroxide Value ◽  
Hexane Extraction ◽  
Meat Meal

Validation of the SafTest Peroxide Test Kit for the Measurement of the Peroxide Content of Oils, Tallows, Meat Meals, Potato Chips, and Grain Based Snacks” AOAC Performance Tested MethodSM 101001

2020 ◽  
Author(s):  
Virginia C Gordon ◽  
Christopher C Rainey ◽  
Willainia C Studmire
Keyword(s):  
Peroxide Value ◽  
Fish Meal ◽  
Dynamic Range ◽  
Oxidative Degradation ◽  
Potato Chips ◽  
Study Objective ◽  
Meat Meal ◽  
Fat Extraction ◽  
Test Kit ◽  
Snack Products

Abstract Background Peroxide value is used as an indicator of oxidative degradation, off flavor and rancidity in fat. Traditional methods are dependent on a fat extraction step to extract fat for subsequent titration of peroxides. The SafTest Peroxide Test offers a direct measurement of the peroxide value of vegetable oils, animal fats, meat meal and fish meal products, and potato chips, crackers and other processed grain-based snack products using micro-analytical and membrane separation principles. Objective The study objective is to validate the SafTest Peroxide Test in an internal study, two contracted studies and an independent laboratory study. Method Calibration, LOQ, robustness, selectivity, matrix, shelf life and lot-to-lot stability were evaluated. Results The practical dynamic range of the calibration is 0.00 to 0.20 meq/kg. LOQ was determined as 0.02 meq/kg for liquids analyzed neat and 0.08 to 0.46 meq/kg for dry matrices requiring a 1:4 to a 1:8 dilution. SafTest Peroxide Test RSDr averaged 1–13% compared to AOCS Cd 8–53 RSDr% of 1–15% and demonstrated average recoveries of 95.7, 91.5, and 105.2% of the AOCS Cd 8–53 results for olive oil, meat meal and fish, and animal fat and oils, respectively. Conclusion The SafTest Peroxide Test is an acceptable alternative to AOCS Cd 8–53 and AOCS Cd 8 b-90 for the measurement of peroxide value in oils, fats, meat meal, fish meal and snack products. Highlight The SafTest Peroxide Test uses small reagent volumes, eliminates fat extraction, and provides a rapid and standardized procedures for the detection of peroxide.

Fate of aflatoxins during almond oil processing

2020 ◽  
Author(s):  
Noreen E. Mahoney ◽  
Luisa W. Cheng ◽  
Jeffrey Palumbo
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Peroxide Value ◽  
Diatomaceous Earth ◽  
Oil Refining ◽  
Hexane Extraction ◽  
Almond Oil ◽  
Oil Processing ◽  
Aflatoxin Content ◽  
Fuller’S Earth

Almonds rejected as inedible are often used for production of almond oil. However, low-quality almonds are frequently contaminated with aflatoxins, and little is known regarding transfer of aflatoxins to almond oil during processing. In this study, oil was produced from reject almonds by hexane extraction. Of 19 almond samples that were naturally contaminated with aflatoxins, 17 oil samples contained measurable amounts of aflatoxins, and aflatoxin content of contaminated oil was correlated with aflatoxin content of the nuts. However, oil aflatoxin levels were not correlated with the oxidation level of the oil as measured by percent free fatty acids and peroxide value. Adsorbents used in oil refining were tested for their ability to remove aflatoxins from contaminated oil. Fuller’s earth and bentonite were the most effective, removing 96% and 86% of total aflatoxins from contaminated oil samples, respectively. Treatment with diatomaceous earth, in contrast, had no effect on aflatoxin levels in oil. These results show that oil refining steps using mineral clay adsorbents may also function to remove aflatoxins from contaminated oil.

Effects of Meat Meal on Steer Performance and Rumen Microbial Activity

1958 ◽  
Vol 17 (2) ◽  
pp. 391-397 ◽  
Author(s):  
I. A. Dyer ◽  
D. W. Fletcher
Keyword(s):  
Microbial Activity ◽  
Meat Meal

Antimutagenic, Antiproliferative and Antioxidant Properties of Sea Grape Leaf Extract Fractions (Coccoloba uvifera L.)

2021 ◽  
Vol 21 ◽  
Author(s):  
Jorge A. Ramos-Hernández ◽  
Montserrat Calderón-Santoyo ◽  
Armando Burgos-Hernández ◽  
Joel S. García- Romo ◽  
Arturo Navarro-Ocaña ◽  
...  
Keyword(s):  
Antioxidant Properties ◽  
In Vitro Tests ◽  
Antimutagenic Activity ◽  
Hexane Extraction ◽  
Biological Potential ◽  
Hct 116 ◽  
Pharmaceutical Industries ◽  
Grape Leaf ◽  
First Time

Background: Cancer is a disease characterized by the invasion and uncontrolled growth of cells. One of the best ways to minimize the harmful effects of mutagens is through the use of natural antimutagens. In this regard, the search for new antimutagens that act in the chemoprevention could represent a promising field in this area. Objective: In this study biological potential of 11 fractions from Coccoloba uvifera L. leaf hexane extract was evaluated by several in vitro tests. Methods: Leaves were lyophilized and hexane extraction was performed. The extract was fractionated by column chromatography with hexane, ethyl acetate, and methanol. The antimutagenic (Ames test), antiproliferative (MTT test), and antioxidant capacity (DPPH, ABTS, and ferrous ion chelation) of the fractions were evaluated. Results: Fractions 4, 6, 8, and 9 have antimutagenic activity (against sodium azide in strain TA100), fraction 11 showed antiproliferative capacity (IC50 of 24 ± 9 μg/mL in cells of HCT 116). The fractions with the highest activity were analyzed by HPLC-MS and lupeol, acacetin, and β-sitosterol were identified. Conclusion: This study demonstrates, for the first time, the bioactivity of C. uvifera leaf as a new source of high biological value compounds (HBVC), which can be of interest to the food and pharmaceutical industries.

Comparison of Procedures for Isolation of Monoterpene Hydrocarbons from Fresh Needles of Picea abies and Picea omorica

2000 ◽  
Vol 65 (7) ◽  
pp. 1073-1081 ◽  
Author(s):  
Valerie Holubová ◽  
Iva Chvílíčková ◽  
Vlastimil Kubáň
Keyword(s):  
Picea Abies ◽  
Liquid Nitrogen ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Total Content ◽  
Storage Conditions ◽  
Fresh Weight ◽  
Hexane Extraction ◽  
Monoterpene Hydrocarbons ◽  
And Storage

Extraction procedures (steam distillation, supercritical fluid extraction and solvent extraction) for isolation of monoterpene hydrocarbons from fresh needles of Picea abies and Picea omorica were optimised. The procedures were compared with the aim of minimizing consumption of needles and improving the extraction efficiency and repeatability. An influence of homogenisation procedures and storage conditions (liquid nitrogen, -18 and 4 °C) on the total content and composition of essential oils was studied. Cryogenic grinding (liquid nitrogen) combined with the extraction with cold hexane (extraction time 2 h) and subsequent GC-MS determination in freshly homogenised needles gives the best results (1.5-4 times better extraction efficiency, RSD < 10% for P. abies and < 25% for P. omorica). Limits of detections (3 S/N) for individual monoterpene hydrocarbons from units to tens of ng/g and recoveries 97.2-101.4% were found in fresh needles (calculated to fresh weight). While cooling to 4 °C is unacceptable, freezing at -18 °C for the period of 18 days in the dark gives also good results.

Oxidation Kinetics of Hazelnut Shelf-Life Prediction Model

2012 ◽  
Vol 200 ◽  
pp. 466-469
Author(s):  
Wen Li Dong ◽  
Xue Gong ◽  
Jing Dong ◽  
Ling Jin ◽  
Yu Xiang Wei
Keyword(s):  
Prediction Model ◽  
Shelf Life ◽  
Peroxide Value ◽  
Storage Temperature ◽  
Order Kinetic ◽  
Shelf Life Prediction ◽  
Changing Patterns ◽  
Kinetics Of ◽  
Life Prediction Model

The changing patterns of filbert peroxide value through the determination of different storage temperature conditions,research the dynamics characteristics of oxidative rancidity of filbert. By regression analysis base on the storage time and the logarithm of peroxide value,it concluded the grease oxidation reaction first-order kinetic equation of filbert.Using Arrhenius equation and Q10 model for 5 ~ 35 °C temperature within the shelf life of any temperature prediction model.

scholarly journals An automated non-destructive prediction of peroxide value and free fatty acid level in mixed nut samples

LWT ◽  
2021 ◽  
Vol 143 ◽  
pp. 110893
Author(s):  
Iman Tahmasbian ◽  
Helen M. Wallace ◽  
Tsvakai Gama ◽  
Shahla Hosseini Bai
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Peroxide Value ◽  
Acid Level ◽  
Free Fatty Acid Level ◽  
Fatty Acid Level ◽  
Non Destructive

Effects of a Meat Meal on Renal Sodium Handling and Sodium Balance

1998 ◽  
Vol 24 (4) ◽  
pp. 279-284 ◽  
Author(s):  
Massimo Cirillo ◽  
Pietro Anastasio ◽  
Lucia Spitali ◽  
Domenico Santoro ◽  
Natale G. De Santo
Keyword(s):  
Sodium Balance ◽  
Meat Meal ◽  
Renal Sodium Handling ◽  
Sodium Handling
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