A RAPID METHOD FOR THE DETERMINATION OF ORGANIC NITROGEN IN LIQUIDS

1930 ◽  
Vol 2 (4) ◽  
pp. 264-266 ◽  
Author(s):  
Reuben B. Sandin ◽  
Norman M. Stover
Keyword(s):  
Acid Solution ◽  
Boric Acid ◽  
Rapid Method ◽  
Organic Material ◽  
Organic Nitrogen ◽  
Rapid Determination ◽  
Bromophenol Blue ◽  
Boric Acid Solution ◽  
Alkali Fusion

A method for the rapid determination of organic nitrogen in liquids is described. It depends upon the liberation of amino, amido, etc. nitrogen as ammonia by an alkali fusion of the organic material. The ammonia is absorbed in excess saturated boric acid solution, and then a titration with standard acid is carried out, using bromophenol blue as the indicator.

RAPID DETERMINATION OF SEED GERMINATION POTENTIAL TO MEASURE QUALITY LOSS IN STORED WHEAT

1982 ◽  
Vol 62 (4) ◽  
pp. 1045-1048 ◽  
Author(s):  
N. D. G. WHITE ◽  
R. N. SINHA ◽  
W. E. MUIR
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Rapid Method ◽  
Rapid Determination ◽  
Quality Loss ◽  
Wheat Seed ◽  
Stored Wheat ◽  
Germination Potential

A rapid method of determining wheat seed germination after 1 day (G1) of incubation was found. Germination of wheat seed stored at [Formula: see text] moisture content is estimated by adding 12% to G1; at <17% moisture content germination is not consistently predicted by G1.

scholarly journals Boron Removal from Aqueous Solutions by Strong Base Anion-exchange Resin Batch and Column Experiments

2021 ◽  
Author(s):  
György Pátzay ◽  
József Dobor ◽  
Emil Csonka ◽  
Gábor Lozsi ◽  
Ferenc Feil
Keyword(s):  
Ion Exchange ◽  
Acid Solution ◽  
Boric Acid ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Free Water ◽  
Sulfate Solution ◽  
Boric Acid Solution ◽  
Strong Base

Borate ion exchange capacity of Purolite NRW600 strong base anion resin in hydroxide form and mixed bed NRW600+NRW100 ion exchange was investigated with static experiments. Anion exchange resin was saturated with 0.1–45 g/dm3 concentration boric acid solution in a static mixer at 20, 30, 40 and 50 °C at 150 rpm for 24 hours. Remaining borate content of saturation solutions was deter-mined with ion chromatography and ICP-OES. The amount of fixed borate as borate anions increased with the saturation borate concentration as well as in case of simple anion exchange as in case of mixed bed.Column sorption-elution study was carried out by using strong base anion exchange resins (Purolite NRW600 and Amberlite IRN78). Resins in hydroxide and in chloride forms were saturated in column with 5–40 g/dm3 boric acid solution in excess. The resin was then eluted with 200 cm3 salt free water with 5 cm3/min at 25 °C and then eluted by 1 mol/dm3 sodium-sulfate solution with 5 cm3/min. The effluent was collected and analyzed for borate content by titrimetric method. In chloride form the resin adsorbed and released much less borate. Effective borate and polyborate sorption needs hydroxide ions in resin phase.

Influence of Boric Acid Solution and Gamma Irradiation on Selective Sorbents

2020 ◽  
Vol 405 ◽  
pp. 193-198
Author(s):  
Daniela Marušáková ◽  
Pavel Kůs ◽  
Lorant Szatmary ◽  
Iveta Adéla Prokůpková
Keyword(s):  
Acid Solution ◽  
Gamma Radiation ◽  
Boric Acid ◽  
Model Solution ◽  
Spectroscopic Techniques ◽  
Boric Acid Solution ◽  
Closed Container ◽  
Sorption Method ◽  
Method Of Production ◽  
Scanning Electron

We tested stability of 43 selective sorbents, covering the widest range of functional groups, efficiency of sorption, method of production, and which are theoretically useful for sorption of cesium, strontium, cobalt, arsenic and actinoids. We present 3 of them: A = TiO2, B = Al2O3 and C = MxH(TiO)4(SiO4)3 . z H2O. In first testing, sorbents were exposed to the model solution of boric acid for 168 hours, in which they were mixed in a closed container with a rotator. After the exposure, sorbent solutions were filtered and analysed by spectroscopic techniques (Infrared Spectroscopy (IR), Raman Spectroscopy (RS) and newly by Scanning Electron Microscopy (SEM), combined with Energy Dispersive Spectroscopy (EDS)). Exposed spectra were compared with spectra of new, non-exposed sorbents. In second testing, sorbents were exposed to gamma radiation for 12 days with total dose 666 ± 43 kGy, produced by cobalt bomb and analysed by same techniques. The aim of our testing was to find out how sorbents behave in model boric acid solution and what effect has the gamma radiation on sorbent spectra and to analyse sorbents by SEM with EDX.

Simple and Rapid Determination of Phytase Activity

1994 ◽  
Vol 77 (3) ◽  
pp. 760-764 ◽  
Author(s):  
Adrianus J Engelen ◽  
Fred C Van Der Heeft ◽  
Peter H G Randsdorp ◽  
Ed L C Smtt
Keyword(s):  
Enzymatic Activity ◽  
Rapid Method ◽  
Rapid Determination ◽  
Phytase Activity ◽  
Sodium Phytate ◽  
Microbial Phytase ◽  
Hydrolysis Of

Abstract A simple and rapid method is described for determining the enzymatic activity of microbial phytase. The method is based on the determination of inorganic orthophosphate released on hydrolysis of sodium phytate at pH 5.5.

Rapid Determination of Mono-, Di- and Tri-isopropyl Citrate in Foods by Gas Chromatography

1986 ◽  
Vol 49 (11) ◽  
pp. 914-916 ◽  
Author(s):  
SUMIKO TSUJI ◽  
YASUHIDE TONOGAI ◽  
YOSHIO ITO
Keyword(s):  
Gas Chromatography ◽  
Ethyl Acetate ◽  
Rapid Method ◽  
Rapid Determination ◽  
Milk Powder ◽  
Detection Limits ◽  
Edible Oil ◽  
Acid Condition

A simple and rapid method for determining mono-, di- and tri-isopropyl citrates in foods was developed. Isopropyl citrates in butter and milk powder were extracted with ethyl acetate under acid condition and in edible oil with hexane. The ethyl acetate containing isopropyl citrates was evaporated and the residue was taken up in hexane. The isopropyl citrates in hexane were extracted into acetonitrile. After evaporation of the solvent, isopropyl citrates were methylated with diazomethane, and they were determined by gas chromatography. Recoveries of mono-, di- and tri-isopropyl citrates from edible oil, butter and milk powder by this method were more than 92.9%, 95.7% and 94.8%, respectively. The detection limits of isopropyl citrates were 1 μg/g of sample.

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