scholarly journals Determination of the contribution of livestock water ingestion to dose from the cow-milk pathway

1992 ◽  
Author(s):  
T Ikenberry
Keyword(s):  
Cow Milk ◽  
Water Ingestion

Ultra-Performance Liquid Chromatographic Determination of L-Ergothioneine in Commercially Available Classes of Cow Milk

2014 ◽  
Vol 79 (9) ◽  
pp. C1683-C1687 ◽  
Author(s):  
Salvatore Sotgia ◽  
Elisabetta Pisanu ◽  
Debora Cambedda ◽  
Gianfranco Pintus ◽  
Ciriaco Carru ◽  
...  
Keyword(s):  
Chromatographic Determination ◽  
Cow Milk ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

scholarly journals A Liquid Chromatography-High Resolution Mass Spectrometry (LC-HRMS) Method for the Determination of Free Hydroxy Fatty Acids in Cow and Goat Milk

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 3947 ◽  
Author(s):  
Maroula G. Kokotou ◽  
Christiana Mantzourani ◽  
Asimina Bourboula ◽  
Olga G. Mountanea ◽  
George Kokotos
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Liquid Chromatography ◽  
High Resolution ◽  
High Resolution Mass Spectrometry ◽  
Goat Milk ◽  
Cow Milk ◽  
Hydroxystearic Acid ◽  
Resolution Mass

A liquid chromatography–high resolution mass spectrometry (LC-HRMS) method for the direct determination of various saturated hydroxy fatty acids (HFAs) in milk was developed for the first time. The method involves mild sample preparation conditions, avoids time-consuming derivatization procedures, and permits the simultaneous determination of 19 free HFAs in a single 10-min run. This method was validated and applied in 17 cow milk and 12 goat milk samples. This work revealed the existence of various previously unrecognized hydroxylated positional isomers of palmitic acid and stearic acid in both cow and goat milk, expanding our knowledge on the lipidome of milk. The most abundant free HFAs in cow milk were proven to be 7-hydroxystearic acid (7HSA) and 10-hydroxystearic acid (10HSA) (mean content values of 175.1 ± 3.4 µg/mL and 72.4 ± 6.1 µg/mL in fresh milk, respectively). The contents of 7HSA in cow milk seem to be substantially higher than those in goat milk.

scholarly journals Synthesis of Graphene Oxide Based Sponges and Their Study as Sorbents for Sample Preparation of Cow Milk Prior to HPLC Determination of Sulfonamides

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2086 ◽  
Author(s):  
Martha Maggira ◽  
Eleni A. Deliyanni ◽  
Victoria F. Samanidou
Keyword(s):  
Graphene Oxide ◽  
Sample Preparation ◽  
Cow Milk ◽  
Preparation Technique ◽  
Limit Of Quantification ◽  
Sorbent Material ◽  
Novel Material ◽  
Polyurethane Sponge ◽  
Fast Procedure

In the present study, a novel, simple, and fast sample preparation technique is described for the determination of four sulfonamides (SAs), namely Sulfathiazole (STZ), sulfamethizole (SMT), sulfadiazine (SDZ), and sulfanilamide (SN) in cow milk prior to HPLC. This method takes advantage of a novel material that combines the extractive properties of graphene oxide (GO) and the known properties of common polyurethane sponge (PU) and that makes sample preparation easy, fast, cheap and efficient. The PU-GO sponge was prepared by an easy and fast procedure and was characterized with FTIR spectroscopy. After the preparation of the sorbent material, a specific extraction protocol was optimized and combined with HPLC-UV determination could be applied for the sensitive analysis of trace SAs in milk. The proposed method showed good linearity while the coefficients of determination (R2) were found to be high (0.991–0.998). Accuracy observed was within the range 90.2–112.1% and precision was less than 12.5%. Limit of quantification for all analytes in milk was 50 μg kg−1. Furthermore, the PU-GO sponge as sorbent material offered a very clean extract, since no matrix effect was observed.

Determination of steroid hormones in bovine milk by LC-MS/MS and their levels in Swiss Holstein cow milk

2016 ◽  
Vol 33 (5) ◽  
pp. 804-816 ◽  
Author(s):  
Alexandre Goyon ◽  
Julia Zhenzhen Cai ◽  
Karin Kraehenbuehl ◽  
Christoph Hartmann ◽  
Bing Shao ◽  
...  
Keyword(s):  
Steroid Hormones ◽  
Bovine Milk ◽  
Cow Milk ◽  
Holstein Cow
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