Method for detecting inorganic phosphorus in milk
A technology for inorganic phosphorus and milk, applied in the field of detection of breast milk, inorganic phosphorus in milk, and inorganic phosphorus in milk or goat milk, to achieve great social value, increase nutritional value, and small error
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Embodiment 1
[0017] Take breast milk from a mother who has given birth for 3 months and is breastfeeding, and centrifuge it on a TGL-16B high-speed desktop centrifuge to obtain the supernatant (a large amount of fat is separated); take 6ml of the above supernatant, transfer it to a 10ml ultrafiltration cup, and store it at room temperature and 5×10 5 Under the nitrogen condition of Pa, use the PM-10 ultrafiltration membrane with a molecular weight cut-off of 10kD, ultrafilter with Amicon Model 8010 ultrafilter, collect the colorless clear liquid that filters out (collect 3 / 4 of the former milk volume), in- Store at 17°C to -20°C for measurement; prepare HEPES (10mM) buffer solution with pH 7.0, and prepare 2×10 -3 MYbCl 3 solution and 2 x 10 -3 Catechol violet solution of M; add 2ml of HEPES buffer solution to a clean UV cuvette as a blank, draw 2×10 -3 50 μl of catechol violet solution of M was added to the cuvette, at this time the solution turned from colorless to yellow, detected on...
Embodiment 2
[0018] Embodiment 2: prepare the HEPES (10mM) buffer solution of pH6.5, all the other are with embodiment 1, obtain the inorganic phosphorus content in the mother's milk and be 2.42mmol / L, the ultraviolet-visible absorption figure sees figure 2 .
Embodiment 3
[0019] Embodiment 3: with Yb (ClO 4 ) 3 The solution, get another people's breast milk, all the other are with embodiment 1, The content of inorganic phosphorus in breast milk is 2.34mmol / L, and the ultraviolet-visible absorption diagram is shown in image 3 .
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