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Colorimetric determination of readily soluble phosphate in soils

✍ Scribed by Williams, E. G. ;Stewart, A. B.

Publisher
Wiley (John Wiley & Sons)
Year
1941
Weight
731 KB
Volume
60
Category
Article
ISSN
0368-4075

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✦ Synopsis

Oiico rccogiiised, effects of this sort are ensily remedied by iiinking st.niidnrc1 nut1 snriiple soliitioiis similnr in composition. dj'JJJ~;CUliOJIS Of the IIlClhOd Tlie follosiiig determiiintioiis nrc rcgiilnrly iiinde in t.liis Lnborntory.

. (I) CnIciiiiii niid sodium iii iiingiiesiiim iiid nluniiiiiuui powders nild nlloys. To 1 g. of the iiietnl 6 nil. of wnter nut1 15 nil. of coiicelitruteil Iiydrochloric ncid solut.ioii nro ntltlcd nut1 the solutioii is iiiutlc up witli water to 50 iiil. This soliitioii is sprnyed. Stnridurds nrc prepred froiii iiict.nl substn~itinlly free from the impurities to be detcriiiiucd, to wliicli kuowii niiioutits of stnndnrd solutions of tlic npproprintc elemelits iire ntlded. Copper, mnugnricsc, niid riing~icsiuiii (the lnst in nlumiiiium) mny nlso be cletermitied.

(2) Rubidium nut1 cicsiiim iii pntnwiiiin chloride precipitates. The snmplc (0.25 g. per 50 iiil. or proportioii-

πŸ“œ SIMILAR VOLUMES

A colorimetric method for the determinat
A colorimetric method for the determination of molybdenum in soils
✍ C. H. Williams πŸ“‚ Article πŸ“… 1955 πŸ› John Wiley and Sons 🌐 English βš– 540 KB

## Abstract The dithiol (4‐methyl‐1 : 2‐dimercaptobenzene) reagent is more sensitive for the determination of molybdenum than is the more commonly used thiocyanate. A method is described for the determination of molybdenum in soils, in which dithiol is used for the final colorimetric estimation. Th