Open Access Theses and Dissertations

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You searched for subject:(Fat soluble vitamins). Showing records 1 – 3 of 3 total matches.

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1. Tucker, Sarah. Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma.

Degree: 2017, Texas Woman's University

URL: http://hdl.handle.net/11274/9367 

The purpose of this study was to establish a method for simultaneous evaluation and quantification of fat-soluble vitamins in human blood samples using reverse-phase high performance liquid chromatography coupled with photodiode array detection. The biochemical forms of fat-soluble vitamins analyzed include retinol, cholecalciferol, calcidiol, α-tocopherol, γ-tocopherol, and phylloquinone. This method is novel in the use of prostaglandin B1 as an internal standard for quantification and utilizes a simple method of extraction without derivatization or saponification. The method had a high degree of reproducibility as evidenced by coefficients of variation 1.7% and 2.5% of the mean for retinal and cholecalciferol respectively. Advisors/Committee Members: Broughton, Shane (advisor), DiMarco, Nancy (advisor), Maziarz, Mindy (advisor).

Subjects/Keywords: Organic chemistry; Nutrition; Pure sciences; Health and environmental sciences; Fat-soluble vitamins; High performance liquid chromatography; Hplc

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tucker, S. (2017). Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma. (Thesis). Texas Woman's University. Retrieved from http://hdl.handle.net/11274/9367

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Tucker, Sarah. “Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma.” 2017. Thesis, Texas Woman's University. Accessed January 21, 2021. http://hdl.handle.net/11274/9367.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Tucker, Sarah. “Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma.” 2017. Web. 21 Jan 2021.

Vancouver:

Tucker S. Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma. [Internet] [Thesis]. Texas Woman's University; 2017. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/11274/9367.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tucker S. Reverse phase high performance liquid chromatography with photodiode array detection method for the identification and detection of fat-soluble vitamins in plasma. [Thesis]. Texas Woman's University; 2017. Available from: http://hdl.handle.net/11274/9367

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Priyanka, Mathur. Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry.

Degree: 2014, Texas Woman's University

URL: http://hdl.handle.net/11274/9930 

A solid-phase extraction (SPE) method was developed for separation and quantification of vitamin A (retinol, beta-carotene, retinyl-palmitate, retinyl-acetate), vitamin D (D2, D3), vitamin E (alpha,beta,gamma,delta tocopherols, tocopheryl-acetate), and vitamin K (K1, K2, K3) from different food matrices. The polarities of all fourteen fat-soluble vitamins (FSVs) were determined and chemical properties of many different organic solvents were studied. Quantification was conducted using liquid chromatography-mass spectrometry (LC-MS). All fourteen fat-soluble vitamins were found to be non-polar in nature; beta-carotene was found to be the most non-polar vitamin in the group, followed by vitamin esters. Tocopherols, ketones (vitamins K1, K2, K3), and alcohols (vitamins D2, D3, and retinol) were found to be relatively more polar. All fourteen forms were soluble in dimethyl sulfoxide (DMSO) and were thus extracted with DMSO and methanol from food matrices. To determine the recoveries of known concentrations of vitamin standards methanol and water were found to be suitable polar solvents for conditioning of the SPE column. Hexane was used for elution. This methodology was further applied to separate fourteen forms of FSVs from food matrices. 80-100% recoveries of FSVs were observed after SPE of provitamin samples (containing 2-3 ingredients). Poor recoveries of FSVs were observed after SPE of complex food samples such as multivitamin capsules, vitamin fortified drink mixes, and chewable nutrition tablets, which consisted of many different ingredients with varying polarities. The presence of other ingredients interfered with the SPE process leading to the elution of other compounds in the hexane solution along with FSVs. Repeated measures ANOVA compared means of total FSVs after SPE and total FSVs from food labels. No significant differences were observed in the means (p < 0.05). A strong reliability (alpha>0.9) was observed between the three SPE extractions from each food sample. This SPE methodology can therefore be used for consistent and efficient separation of FSVs from products which do not have compounds that interfere with the extraction process. Advisors/Committee Members: DiMarco, Nancy (advisor), Sheardy, Richard (advisor), Warren, Cynthia (advisor), Omary, Manal (advisor), Scott, Rene (advisor).

Subjects/Keywords: Pure sciences; Biological sciences; Health and environmental sciences; Fat soluble vitamins; LC-MS; Solid phase extraction; Solvent extraction; Vitamin fortified food; Vitamin supplements

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Priyanka, M. (2014). Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry. (Thesis). Texas Woman's University. Retrieved from http://hdl.handle.net/11274/9930

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Priyanka, Mathur. “Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry.” 2014. Thesis, Texas Woman's University. Accessed January 21, 2021. http://hdl.handle.net/11274/9930.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Priyanka, Mathur. “Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry.” 2014. Web. 21 Jan 2021.

Vancouver:

Priyanka M. Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry. [Internet] [Thesis]. Texas Woman's University; 2014. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/11274/9930.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Priyanka M. Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry. [Thesis]. Texas Woman's University; 2014. Available from: http://hdl.handle.net/11274/9930

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Iowa State University

3. Agustiana, Agatha. The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables.

Degree: 2010, Iowa State University

URL: https://lib.dr.iastate.edu/etd/14077 

The objectives of the study were to define the dose-response relation of the amount of added oil and: 1) the absorption of carotenoids, phylloquinone and tocopherols in salad vegetables and 2) the absorption of retinyl palmitate formed from the ingested provitamin A carotenoids, ¦Á- and ¦Â-carotene. Women (n = 12) each consumed 5 salads containing equivalent amounts of carrot, cherry tomato, romaine lettuce and spinach. The salads with salad dressings containing 0, 2, 4, 8 or 32 g tocopherol-stripped soybean oil were ingested in random order separated by ¡Ý 2 weeks. Blood samples were collected at baseline and 2, 3.5, 5, 7, and 9.5 h postprandially. Chylomicron fractions were extracted and analyzed by HPLC with coulometric array electrochemical detection. When the salads were ingested with 0 g oil, there was negligible absorption of ¦Á- and ¦Â-carotenes, lutein, lycopene, phylloquinone, retinyl palmitate, ¦Á- and ¦Ã-tocopherols. For ¦Á- and ¦Â-carotenes, lycopene, retinyl palmitate, and ¦Á- and ¦Ã-tocopherols, absorption was increased with each amount of oil compared with 0 g oil (P <0.05). Starting from 4 g oil, all analytes (¦Á-carotene, ¦Â-carotene, lutein, trans-lycopene, vitamin A, ¦Á-tocopherol, ¦Ã-tocopherol, and vitamin K1) showed significant increases in absorption compared with 0 g oil salad dressing. The absorption of each carotenoid and fat-soluble vitamin was highest with 32 g ingested oil (P < 0.002).

Subjects/Keywords: Nutritional Sciences; bioavailability; carotenoids; co-ingested fat; fat-soluble vitamins; salad dressing; salad vegetables; Human and Clinical Nutrition; Nutrition

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Agustiana, A. (2010). The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/14077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Agustiana, Agatha. “The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables.” 2010. Thesis, Iowa State University. Accessed January 21, 2021. https://lib.dr.iastate.edu/etd/14077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Agustiana, Agatha. “The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables.” 2010. Web. 21 Jan 2021.

Vancouver:

Agustiana A. The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables. [Internet] [Thesis]. Iowa State University; 2010. [cited 2021 Jan 21]. Available from: https://lib.dr.iastate.edu/etd/14077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Agustiana A. The dose-response effects of the amount of oil in salad dressing on the bioavailability of carotenoids and fat-soluble vitamins in salad vegetables. [Thesis]. Iowa State University; 2010. Available from: https://lib.dr.iastate.edu/etd/14077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.