Dataset on the content of vitamin D3 and 25-hydroxyvitamin D3 in 40 pork (Breitov breed) commodities

This dataset demonstrates the content of vitamin D3 and 25-hydroxyvitamin D3 (25OHD3) in boiled, grilled, and raw pork for both lean and whole cuts including ribs, tenderloin, shoulder, neck, belly, and center chops. Total fat content in raw pork cuts was determined by the gravimetric method. Quantification analysis using reverse phase high performance liquid chromatography with UV-DAD connected. Purification of fatty acids from proteins was performed using a c18 cartridge, resolving vitamin D3 from its metabolites by subjecting purified samples to polar silica cartridge, purification from sugars by a series of two amino columns, and quantification of vitamin D3 and 25-hydroxyvitamin D3 by injecting purified extracts on C18 SPE column. Grilling samples was conducted in an electric combi oven.


Specifications
Food Science: Food Chemistry Specific subject area Food analysis, vitamin D 3 and 25-hydroxyvitamin D 3 content in pork Type of data Pork samples used in this study were obtained from a 6 months old male pig bel to (Breitov breed) and had a carcass weight of 67.8 kg.
Common lean and whole cuts (ribs, tenderloin, shoulder, neck, belly, center chops) were boiled, grilled, or kept raw and separated into lean and whole cuts.
Lean samples: separated fats are removed and intermuscular fats were kept; Whole samples: are pork cuts without removing fat.
The data on the contents of 25OHD 3 and vitamin D 3 were obtained by UHPLC according to Bilodeau et al. [1,2] with a slight modification.
Pork boneless lean and whole cuts were grilled inside an electric combi oven (FlexFusionTM Henny Penny, USA).
The data on the total content of fat in lean and whole cuts by the gravimetric method through solvent extraction after hydrochloric acid hydrolysis [3] .

Value of the Data
• This data is useful for positioning the primary contents of both vitamin D 3 and 25OHD 3 in different pork cuts. • This data compares the content of vitamin D 3 and 25OHD 3 in lean and whole pork cuts subjected to boiling, grilling, and raw samples. • This dataset provides additional information about 40 different pork commodities that would help fill the knowledge gaps regarding vitamin D 3 and 25OHD 3 contents of foodstuffs. • This dataset can help nutritionists and nutrition-related applications in advising daily meal plans.

Data Description
Data provided in Table 1 was generated from 40 different pork commodities regarding the contents of vitamin D 3 and 25OHD 3 in lean and whole pork cuts subjected to boiling and grilling along with raw samples. Common cuts chosen for the analysis are: ribs, tenderloin, center chops, shoulder (blade), neck, belly (side), lean, and extra-lean grounded pork samples. Vitamin D 3 and 25OHD 3 were determined by HPLC with an analytical procedure as follows: (1) direct saponification; (2) extraction of the unsaponified partitions; (3) purification of the unsaponified fractions by C18, silica, and amino solid-phase extraction columns (SPE); (4) Quantification was performed by injecting purified extracts on RP C18 SPE column.
Data provided in Table 2 demonstrates the total fat content in lean and whole raw pork cuts samples. Table 1 Vitamin D 3 and 25-hydroxyvitamin D 3 (mg/100 g; mean * (range; SEM)) in raw, boiled, and grilled pork commodities separated into lean and whole cuts.

Experimental Design, Materials and Methods
Pork meat used in this study was obtained from a male pig (Breitov breed), brought from the licensed slaughterhouse (Ariant, Moscow, Russia) on the 8th of November 2021 in when it was around 6 months old and had a carcass weight of 67.8 kg.
Common cuts were chosen for the analysis including ribs, tenderloin, shoulder (blade), neck, belly (side), and center chops. The mixture from all the previously mentioned cuts was used for making lean and extra-lean grounded pork samples. Bones were removed from all cuts, then cuts were placed in plastic containers provided with absorbent tray pads at the bottom and then frozen at −18 °C for 24 h before analysis.

Grilling
Dissection and separating of lean meat from connective tissues and adhering fat parts took place exactly before grilling. Pork boneless cuts were separated from each other's on metal trays and placed in a preheated Electric combi oven (FlexFusion TM Henny Penny, USA). Samples were steamed for 30 min at a temperature of 220 °C.

Boiling
Each mass was cut into approximately 100 g pork cuts. Samples were obtained either by cubing the meat by cutting muscle fibers horizontally or slicing them by vertically cutting fibers. Samples were placed in a pan and boiled for 90 min with 1 L tap water (pH = 7.18). No additives were added.

Analysis of 25OHD 3 and vitamin D 3 2.3.1. Samples preparation
Analysis was performed in a closed laboratory without windows provided with special covered lamps. Nitrogen (N 2 ) gas was used to replace air before the saponification step.
Measures such as pre-cooling the sample were taken into account to eliminate the effect of the temperature rise during this procedure. Samples prepared for the test were analyzed without delay and protected from light.

Saponification
A sample size of 50 g for each body part was thoroughly ground in a suitable mill and well mixed. Approximately 50 mg of the homogenized sample was transferred into a 10 ml glass test tube equipped with a proper cap. 3 mL of 96% Ethanol and 0.15 mL 95% KOH, 100 mL 1% pyrogallol, 0.25 mg ascorbic acid, 0.1 mL of Cholecalciferol 99% and 0.1 mL of Ergocalciferol 99% as internal standards were added and shaked for 2 min. The tube was transferred into 80 °C water bath and kept for 40 min. The cap was sealed up and 1 mL of bi-distilled water and 3 mL of n-hexane were added and then gently shaked.
The saponified mixture was centrifuged at 80 0 0 rpm for 5 min. The top layer was collected and the extraction was performed again for better results with 3 mL of n-hexane without water and then centrifuges.

Purification
Samples were washed in the hexane phase with 2 mL of bi-distilled water followed by centrifugation. The aqueous phase was separated and discarded. And 1 ml of 99.9% 2-propanol was added to the washed hexane phase. Samples were purified with solid-phase extraction (SPE) columns. The procedure was performed under a flow of nitrogen gas.

Quantification of vitamin D 3 and 25-hydroxyvitamin D 3
Elution was performed as the following: 12 mL of 0.4% (Dichloromethane/2-propanol) solution were added to 40 μm from the extracts of the SPE columns. Samples were evaporated under a stream of nitrogen gas until dry. The mixture was reconstituted with 350 μm of 0.4% (Dichloromethane/Isopropyl Alcohol) solution. Exactly 100 μL was injected at a flow rate of 1.0 mL/min in the device. 0.5% of (Isopropyl Alcohol/n-hexane) served as mobile phase.
Quantification of vitamin D 3 and 25OHD 3 was performed by injecting extracts on SPE column RP C18 (Synergy hydro-RP 4.0 μm, 4,6 × 250 mm, Phenomenex Incorporation, USA). Vitamin D 3 and 25OHD 3 were detected on a compacted UV photo-diode array at 264 nm. The content of Vitamin D 3 was achieved from the relation among peak areas of both vitamin D 3 and vitamin D 2 . An external standard calibration curve was used to calculate the content of 25OHD 3 in pork samples.

Determination of total fat
The determination of total fat in pork samples was conducted by the gravimetric method [3] . Four samples (100 g) of each raw cut with rather similar fat concentrations were prepared for the analysis by grinding them using a meat grinder (DEM-JR01, Xiaomi Mi, China) and then storing them in plastic packs at a temperature of −20 °C for 12 h.
Each sample was treated with 8 M HCL, gently mixed, and ethanol was added. The liberated fat was then extracted with a mixture of petroleum ether and diethyl ether solvents. The solvent was evaporated and the fat was weighed then the percentage of fat content was calculated.

Ethical Statement
There is no funding for the present effort. There is no conflict of interest. The data is available in public domain.

Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships which have, or could be perceived to have, influenced the work reported in this article.