Colorimetric Methods for the Determination of Phosphorus

Zinzadze, Ch.

doi:10.1021/ac50096a008

Cited by 66 publications

(23 citation statements)

References 14 publications

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“…of fairly clear solution was pipetted out, put into 5 ml. of I N NaC1, cleared by centrifuging, and the phosphate determined on an aliquot by Zinzadze's (1935) method. When the pH 3-5 buffer was used, sufficient NaCl was added to bring the ionic strength up to 0.085 unit, which was that of pH 5.5 buffer.…”

Section: Experimental Methodsmentioning

confidence: 99%

The Reaction Between Phosphate and Phosphate‐fixing Soils

Leaver¹,

Russell²

1957

Journal of Soil Science

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Summary Phosphate‐fixing soils and hydrated iron and aluminium oxides have their power of sorbing phosphate reduced if they are pretreated with reagents forming insoluble or unionized compounds with iron and aluminium ions. Soils sorb many more milliequivalents of these blocking reagents than correspond to the drop in their phosphate‐sorbing power, and it does not seem to be possible for a soil to sorb so much of one of these reagents that it ceases to sorb phosphate. Blocking reagents such as potassium ferrocyanide and 8‐hydroxy‐quinoline cannot be used to distinguish hydrated iron from aluminium oxides as the agents causing this phosphate sorption. Soils which have been treated with hydrosulphite to remove some of the free hydrated iron and aluminium oxides still sorb phosphate, but this sorption is reduced to a very low value if the soil is then treated with a blocking reagent. The fulvic acid fraction of soil organic matter is a good blocking agent. Fulvic acid and blocking reagents such as aluminon and alizarin S cause the soils to deflocculate in 0.1 N sodium acetate.

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Section: Experimental Methodsmentioning

confidence: 99%

The Reaction Between Phosphate and Phosphate‐fixing Soils

Leaver¹,

Russell²

1957

Journal of Soil Science

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“…For tlc, commercial plates of silica gel (Eastman) were used. Nitroxide groups give white spots on a b l~~e background with the Zinzadze reagent (16)(17).…”

Section: Methodsmentioning

confidence: 99%

“…The solution was washed twice with 10:; NaOH and then with water until neutrality. The CHC13 solution was dried (Na2S04), then evaporated to dryness to give a crude yellou~ oil a~hich showed two spots on tlc using Zinzadze reagent (16) (2-riiesy~-n',lv-di~1et/1~~et~1y~)atziine H~drocliloride, 3b The amino-alcohol 3a (1.2 g) in 9 ml of dry C6H6 was added dropwise to a solution of mesyl chloride (0.39 g) in 7 ml of dry C6H6 at 20 ' C . The solution was stirred and kept at room ternperatuse for 2 h, then the yellow precipitate formed was collected by filtration (1.17 g, 75'2).…”

Section: N-(3-curboxy-2255-retranzerli~l-i-p~~rrolidi11~lox)~lj-mentioning

confidence: 99%

Evaluation of a spin-labeled inhibitor of acetylcholinesterase

Kavanagh-Caron¹,

Caron²,

Brisson³

et al. 1976

Can. J. Chem.

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“…The U.S. Public Health Service (1946) recommends that the sulfate concentration not exceed 250 ppm in drinking and culinary water on carriers subject to Federal quarantine regulations. There is some report of a detrimental effect of sulfate to livestock, but it also seems to offset in part the toxicity of selenium toward cattle (Hurd-Karrer, 1934, 1935.…”

Section: D:38 Sulfatementioning

confidence: 99%