Thermodynamics of the system water-sodium dihydrogen phosphate-phosphoric acid

1976 ◽  
Vol 21 (4) ◽  
pp. 468-469 ◽  
Author(s):  
Robert F. Platford
Keyword(s):  
Phosphoric Acid ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Sodium Dihydrogen ◽  
System Water

Synthesis of sodium ammonium hydrophosphate and sodium dihydrophosphate based on extraction phosphoric acid from Central Kyzylkum phosphorites

2021 ◽  
pp. 19-25
Keyword(s):  
Phosphoric Acid ◽  
Sodium Carbonate ◽  
Gaseous Ammonia ◽  
Dihydrogen Phosphate ◽  
Hydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Ammonium Hydrogen ◽  
Ammonium Hydrogen Phosphate ◽  
Sodium Dihydrogen ◽  
Extraction Phosphoric Acid

The aim of the research is the synthesis of sodium ammonium hydrogen phosphate and sodium dihydrogen phosphate based on purified extraction phosphoric acid. The acid was purified from accompanying impurities by precipitation methods using sodium carbonate and metasilicate, washed burnt phosphoconcentrate, barium carbonate, acid neutralization with gaseous ammonia. Pre-neutralization of the purified solution of monoammonium phosphate with sodium carbonate to the ratio Na2O:P2O5 = 0.44 and subsequent drying at a temperature of 50 °С allows to obtain sodium ammonium hydrogen phosphate tetrahydrate, and at 100 °С sodium dihydrogen phosphate monohydrate. The individuality and purity of the synthesized substances was established by the methods of X-ray diffraction, IR spectroscopy, thermogravimetry and scanning electron microscope.

THE USE OF P32 LABELED GLYCEROPHOSPHATE IN THE STUDY OF YOLK PHOSPHOLIPIDS

1949 ◽  
Vol 27b (7) ◽  
pp. 629-637 ◽  
Author(s):  
J. W. T. Spinks ◽  
C. C. Lee ◽  
J. B. O'Neil
Keyword(s):  
Enzymatic Hydrolysis ◽  
Phosphoric Acid ◽  
Comparative Studies ◽  
Inorganic Phosphate ◽  
Laying Hen ◽  
Trisodium Phosphate ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Sodium Dihydrogen ◽  
Hydrolysis Of

Labeled sodium glycerophosphate has been prepared by phosphorylating glycerol with sodium dihydrogen phosphate containing P32. After the labeled sodium glycerophosphate had been fed to a laying hen, radiophosphorus from glycerophosphate appeared in the shells, whites, and yolks of the eggs. The uptake in different eggs followed a pattern similar to that found for inorganic phosphate, the maximum occurring at the fourth or fifth egg. Comparative studies using P32 labeled sodium glycerophosphate and trisodium phosphate indicate that the rate of utilization of the phosphorus from glycerophosphate is less than the rate of utilization of the phosphorus from inorganic phosphate. The possibility of an enzymatic hydrolysis of glycerophosphate followed by the incorporation of the resulting phosphoric acid into the phospholipids and the phosphorylation of lower glycerides (partially hydrolyzed fat) by inorganic phosphate as a mechanism for phospholipid formation is discussed.

The Effect of Phosphatic Composite on Magnesium Phosphate Cement Performance

2014 ◽  
Vol 809-810 ◽  
pp. 477-484
Author(s):  
Zhao Qing Qi ◽  
Hong Tao Wang ◽  
Jun Liang Dang ◽  
Shi Hao Zhang ◽  
Jian Hua Ding
Keyword(s):  
Setting Time ◽  
Potassium Dihydrogen Phosphate ◽  
Magnesium Phosphate ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Hydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Disodium Hydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Sodium Dihydrogen

The capacity of 10%, 30%, and 50% ammonium dihydrogen phosphate were replaced with an equal amount of three phosphate (potassium dihydrogen phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate) respectively. Magnesium phosphate cement was made by phosphate of replaced, which strength, setting time, fluidity, hydration temperature, and the hydration products was researched. The results show that: MPC was made that replaced with the equal amount of three kind of phosphate, which has good mechanical properties. Setting time and fluidity change along with the replacment. Three kind of phosphate replace ammonium dihydrogen phosphate, which change the hydration process of MPC. When ammonium dihydrogen phosphate was replaced by an equal amount of disodium hydrogen phosphate, the temperature of hydration is only 69.4 °C. XRD showed that the diffraction peaks of composite’s magnesium phosphate cement increases.

scholarly journals OFAT versus DOE as two optimization protocols for the chromatographic analysis of some OTC pharmaceuticals carrying negative cardiovascular effects and administered by pregnant and breast-feeding females: Application to dose dependent effect

2020 ◽  
pp. 1-14
Author(s):  
Dina El Sherbiny ◽  
Mary E. K. Wahba
Keyword(s):  
Flow Rate ◽  
Mobile Phase ◽  
Cardiovascular Effects ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Pregnancy And Lactation ◽  
Face Centered ◽  
Comparison Of The Results ◽  
Sodium Dihydrogen

Abstract A simple HPLC technique has been utilized for rapid and sensitive quantitative analysis of two mixtures of drugs that are used during pregnancy and lactation. Drugs of the first mixture are used to manage gastrointestinal tract illness that are common during early stages of pregnancy, while pharmaceutical agents of the second mixture are administered over the counter as galactagogues or to overcome postpartum depression. Mixture I includes famotidine (FMT), ranitidine (RNT), nizatidine (NZT), and pantoprazole (PNT), which were separated on a C18 column using a mobile phase composed of methanol: 0.02 M sodium dihydrogen phosphate (60:40, v/v) of pH 6.9, adopting UV detection at 240 nm at a flow rate of 1 mL/min. Mixture II on the other hand, consists of domperidone (DOM), metoclopramide (MET), and sulpiride (SUL). These drugs were eluted using the same column and flow rate as those in mixture I, using a mobile phase consisting of acetonitrile: 0.075 M sodium dihydrogen phosphate (30:70, v/v) of pH 6 adopting a detection wavelength 270 nm. Two optimization protocols were utilized to optimize the chromatographic separation conditions, namely one factor at a time (OFAT) and design of experiments (DOE) where face centered cube response surface experimental design was chosen for this investigation. Comparison of the results obtained from both protocols reveals the accordance between them. Full validation procedure under guidance of United States Pharmacopoeia (USP) was applied to the proposed methods which enabled their application to separate the drugs of both mixtures in spiked rat whole blood samples and in vivo analysis of rat heart blood.

Osmolarity of Human Serum and of Chemical Solutions of Biologic Importance

1961 ◽  
Vol 7 (2) ◽  
pp. 156-164 ◽  
Author(s):  
Edward B Hendry
Keyword(s):  
Human Serum ◽  
Freezing Point ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Hydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Disodium Hydrogen Phosphate ◽  
Normal Human ◽  
Chemical Solutions ◽  
Sodium Dihydrogen

Abstract With the use of the Fiske Osmometer, the mean total osmolarity of normal human serum was found to be 289 mOsM (S.D., 4), which is equivalent to a mean freezing point of -0.537°. The isosmotic concentrations of some important biologic solutions were determined. It was also found that M/15 solutions of disodium hydrogen phosphate and of potassium dihydrogen phosphate are very hypotonic, and that 3.8% sodium citrate is hypertonic. Hemolysis of erythrocytes in isosmotic ammonium chloride solution can be considerably delayed by the addition of 3.0% glucose to the solution. Isosmotic concentrations of disodium hydrogen phosphate and sodium dihydrogen phosphate were precisely determined, as were pH levels of buffer solutions made from these two salts. The cause of the slight changes in osmolarity that occur when these two isosmotic solutions are mixed is discussed.

The Discharge Characteristics of PEO Films in K2ZrF6 with NaH2PO4 Electrolyte

2012 ◽  
Vol 577 ◽  
pp. 115-118
Author(s):  
Wen Fu ◽  
Li Wang ◽  
Li Chen
Keyword(s):  
Oxidation Process ◽  
Dihydrogen Phosphate ◽  
Sodium Dihydrogen Phosphate ◽  
Discharge Characteristics ◽  
Effect Of Additives ◽  
Ceramic Films ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Different Content ◽  
Sodium Dihydrogen

The discharge characteristics of the potassium fluorozirconate electrolyte during plasma electrolytic oxidation process were investigated. Sodium dihydrogen phosphate was applied as additives. Ceramic films were prepared on magnesium alloy in electrolytes with different content additives under constant voltage. The effect of additives on the pH of the electrolyte and the dissolution of the substrate were investigated. It was found that the additives could influence the pH and dissolved magnesium ions effectively.

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