A method is proposed for determining the titratable acidity and the total exchangeable base cations by extracting the soil with a solution of 1 M ammonium chloride and 0.1 M imidazole buffered at pH 7.0. In nonsaline soils the cation exchange capacity is obtained as the sum of those two ...
Radical copolymerization of N , N -dimethyl- N , N -diallylammonium chloride with N , N -dimethylacrylamide has been investigated by FTIR, 1 H NMR spectroscopies, and conductometric titration method. Monomer reactivity ratios were determined by the application of Finemann-Ross, Kelen-Tudos and ...
From the titration values obtained with the soil and blank solutions, calculate the content of adsorbed ammonium in milligram equivalents per 100 g soil. 7.8 Acid-NaCl method: 7.8.1 Leach the ammonium-saturated soil from Paragraph 7.5 with 10% acidified NaCl until 225 mL have passed through ...
A method for determination of ammonium ions in fertilizers is described that is based on "reversible" precipitation titration of ammonium ions by a standard solution of aqueous sodium tetraphenylborate with potentiometric indication of the equivalence point and use of a nitrate-selective membrane indicato...
氯化物(Cl)Chloride,% ≤0.01 0.02 碘酸盐及碘(以IO3计)Iodate and ioldide,% ≤0.003 0.01 铁(Fe)Iron,% ≤0.0001 0.0003 项目名称Item ACS Grade 含量Assay ≥99.0% 不溶物Insoluble matter ≤0.005% 灼烧残渣Residue after ignition ≤0.05%
Sulfur method: put proper amount of water and sulfur powder into the reactor and stir into a paste like status; add slowly graded solid sodium cyanide for reaction to obtain sulfur sodium cyanide at a temperature of about 110 ℃. Then further add solid ammonium chloride for the reaction to ...
Titration calorimetric data are reported for the deaggregation of micelles in aqueous solution at 298.2 K formed by hexadecyltrimethylammonium bromide (C16... J Bach,MJ Blandamer,K Bijma,... - 《Journal of the Chemical Society Faraday Transactions》 被引量: 81发表: 1995年 Thermodynamic and NMR...
made: urine flow rate, clearances of inulin, PAH, urea, creatinine, uric acid, osmolar and free water clearances, excretion rates of sodium, chloride, potassium, calcium, phosphate, bicarbonate, ammonium, titratable acidity and urine ... HA Aissa,N Pozet,M Labeeuw,... - 《British Journal...
This method consists of making a suspension of a known mass of carbon black into a water CTAB solution of known concentration. Carbon black is then filtered and the quantity of adsorbed CTAB is determined by titration of the remaining CTAB in the filtrate. Surface area of carbon black is ...
Content analysisAccurately weighed about 500mg sample, dissolved in 50ml of water, with 0.1mol/L sodium hydroxide titration to pH 8.0. per mL, 0.1mol/L sodium hydroxide is equivalent to diammonium phosphate [NH4H2PO4] 11.50 mg. ToxicityADI: 0 to 70 mg/kg (amount of total phosphate as pho...