Dibasic phosphate

Dibasic phosphate Stable under neutral conditions Considered immobile... 

A potassium phosphate solution contains 0.75 g of potassium acid phosphate and 3.5 g of potassium dibasic phosphate in 10 mL. Five milliliters of this solution are added to a liter of D5W. How many milliequivalents of potassium phosphate will be represented in the final D5W solution ... 

Molecular weight of potassium dibasic phosphate (K2HP04) = 174... 

All basic magnesium phosphates find apphcations in plastics as stabilizers. Other than this, monobasic salt is used in fireproofing wood. The dibasic phosphate is a food additive and also a laxative. The tribasic phosphate is an antacid and a nutritional food supplement. The compound also is an adsorbent and a pohshing agent in dental work. 

Prepare 0.25 M pH buffer solutions ranging from pH 0.5 to 9. (Note that phosphate buffer is only good for pH = 4.5-9 due to the dissociation constant.) Before coming to the lab, review how to make a pH buffer solution in a freshman chemistry textbook and calculate the relative amounts of KH2PO4 (monobasic phosphate) and K HPO O (dibasic phosphate) needed to make these phosphate buffer solutions. 

By a happy coincidence (for it is without doubt that such a force must be at work with the emergence of such peculiar images never before seen by human eyes) I got hold of a solution of cooking salt when I wanted to drop red potassium cyanide solution on a manganese salt base, in whose centre there was some ammonium dibasic phosphate. 

C.M. Carey, W.B. Riggan, Cyclic Polyamine lonophore for Use in a Dibasic Phosphate-Selective Electrode , Anal. Chem., 66,3587 (1994)... 

Repeat steps 10-58 to 10-63 but use 0.1 ml water and 0.1 ml 0.005M potassium dibasic phosphate (K2HPO4) in place of the 0.2 ml water used... 

Other examples are the dibasic phosphates, arsenates, mixed sulfates, and similar compounds—KH2PO4, NH4H2ASO4, Ag2H3lOe, (NH4)8A1(S04)2 6H20, and (NH4)2S04. (See 305 for a general treatment of ferroelectrics.)... 

Serum previously stored at -80 °C was freshly thawed and diluted 3,500 fold using PBS-T (0.02% Tween 20 in PBS). An aqueous alachlor standard or unknown sample was preincubated with an equal volume of diluted serum at 22 °C for 1 hour. This mixture (0.1 mL/well) was then dispensed into six replicate wells on the plate, which was then covered and incubated at 22 °C for 1.5 hours. After triplicate washes of the wells with PBS-T, each well was treated with 0.1 mL of GAR-HRP (freshly thawed and diluted 4,000 fold with 1.0% powdered milk in PBS). After a final cycle of four washes with PBS-T, 0.2 mL of freshly prepared PDA substrate solution (0.4 mg/mL PDA and 0.01% H2O2 in 0.05 M citric acid containing 0.15 M sodium dibasic phosphate, pH 5.0) was dispensed into each of the wells and incubated in the dark at 22 °C for 30-60 minutes. Sulfuric acid (4 N, 0.05 mL/well) was added to stop the reaction, and the final absorbance of each well (490 nm) was recorded. The presence of free alachlor in samples inhibited the binding of the antibody to alachlor-BSA, resulting in an inhibition of the development of absorbance at 490 nm. The amount of free alachlor was thus inversely proportional to the intensity of color produced. The level of alachlor in unknown water samples was calculated based on alachlor standards which had been analyzed simultaneously on each plate. Alachlor standards (0, 0.2, 0.5, 1.0, 3.0, 5.0, and 8.0 ppb in deionized water) were stored at -20 °C in 1 mL portions, and were freshly thawed for each assay. 

Carbonic acid/bicarbonate Monobasic/dibasic phosphate Ammon ium/ammonia Lactic acid/lactate... 

Phosphoric and Polyphosphoric Acid Esters, R(OC2H4)xOP(0)(0 M+)2 and [R(OC2H4)xO]2P(0)0 M+ Mainly phosphated POE alcohols and phenols, some sodium alkyl phosphates (not oxyethylenated). The POE materials are available in free acid form or as sodium or amine salts. Products are mixtures of monobasic and dibasic phosphates. 

Organic Acids. The ability of 33 strains of yeast to grow and produce pyruvic acid using dried citrus peel as a substrate was evaluated (22). Debaryomyces coudertii IFO 1381 and Candida utilis IF0 0396 produced yields of pyruvic acid near 82 mg/100 mL after 24 hours of fermentation at 30°C. Fermentation conditions were optimized with respect to nitrogen source (0.5% ammonium sulfate, dibasic phosphate concentration (0.1%), yeast extract concentration (0.01%), calcium carbonate concentration (1.0%), and magnesium sulfate concentration (0.01%). Pretreatment of citrus peel powder with the sodium form of Amberlite IR-120B was observed to enhance pyruvic acid production. Under optimized conditions, a maximum of... 

As to the influence of the phosphates on the protease of yeast, the same effect is observed here as was observed by Fernbach in the case of pancreatin. Dibasic phosphate is injurious, an equimolal mixture of monobasic phosphate KH2PO4 (0.76 per cent) and of dibasic phospdrate K2HPO4 (0.979 per cent) is without effect, while monopotassium phosphate is distinctly favorable. The following table, expressing these results, indicates that the favorable action of the acid phosphate is exerted just as well at as at 50°. Furthermore, its efficacy incveases with the quantity used ... 

Betamethasone acetate Sodium dibasic phosphate Sodium monobasic phosphate NaOH or HCI Water for injection... 

The PAN based activated carbon hollow fibers (ACHF) have brought on many investigators interest, since PAN-based ACHF shows large adsorption capacity. PAN hollow fibers are pretreated with ammonium dibasic phosphate and then further oxidized in air, carbonized in nitrogen, and activated with carbon dioxide. 

The pH value of the lachrymal fluid is about 7.4. Due to evaporation of CO2 from the tear film when the eyes are open, the pH value increases to 8 and even higher values [52]. Three buffer systems are present in tear fluid bicarbonate-carbonate, mono-dibasic phosphate and amphoteric proteins the buffer capacity is low [53]. The acid-neutralising capacity of the tear fluid of one eye is equal to about 8-10 microlitres 0.01 M NaOH. 

H2PO4- HPO42- Hydrogen phosphate Dibasic phosphate... 

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