A 5-day method for determination of soluble silicon concentrations in nonliquid fertilizer materials using a sodium carbonate-ammonium nitrate extractant followed by visible spectroscopy with heteropoly blue analysis: single-laboratory validation.

A 5-day method for determination of soluble silicon concentrations in nonliquid fertilizer materials using a sodium carbonate-ammonium nitrate extractant followed by visible spectroscopy with heteropoly blue analysis: single-laboratory validation.

Journal of AOAC International (2013-06-19)

Dennis Sebastian, Hugh Rodrigues, Charles Kinsey, Gaspar Korndörfer, Hamilton Pereira, Guilherme Buck, Lawrence Datnoff, Stephen Miranda, Mary Provance-Bowley

PMID23767347

ABSTRACT

A 5-day method for determining the soluble silicon (Si) concentrations in nonliquid fertilizer products was developed using a sodium carbonate (Na2CO3)-ammonium nitrate (NH4NO3) extractant followed by visible spectroscopy with heteropoly blue analysis at 660 nm. The 5-Day Na2CO3-NH4NO3 Soluble Si Extraction Method can be applied to quantify the plant-available Si in solid fertilizer products at levels ranging from 0.2 to 8.4% Si with an LOD of 0.06%, and LOQ of 0.20%. This Si extraction method for fertilizers correlates well with plant uptake of Si (r2 = 0.96 for a range of solid fertilizers) and is applicable to solid Si fertilizer products including blended products and beneficial substances. Fertilizer materials can be processed as received using commercially available laboratory chemicals and materials at ambient laboratory temperatures. The single-laboratory validation of the 5-Day Na2CO3-NH4NO3 Soluble Si Extraction Method has been approved by The Association of American Plant Food Control Officials for testing nonliquid Si fertilizer products.

MATERIALI

N° Catalogo

Marchio

Descrizione del prodotto

223530

Sigma-Aldrich

Carbonato di sodio, powder, ≥99.5%, ACS reagent

222321

Sigma-Aldrich

Carbonato di sodio, ACS reagent, anhydrous, ≥99.5%, powder or granules

A9642

Sigma-Aldrich

Ammonium nitrate, ≥99.0%

223484

Sigma-Aldrich

Carbonato di sodio, ACS reagent (primary standard), anhydrous, 99.95-100.05% dry basis

221244

Sigma-Aldrich

Ammonium nitrate, ACS reagent, ≥98%

S2127

Sigma-Aldrich

Carbonato di sodio, ReagentPlus^®, ≥99.5%

71360

Sigma-Aldrich

Sodium carbonate decahydrate, puriss. p.a., ≥99.0% (T)

230952

Sigma-Aldrich

Sodium carbonate monohydrate, ACS reagent, ≥99.5%

13418

Sigma-Aldrich

Carbonato di sodio, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, anhydrous, 99.5-100.5% (calc. to the dried substance)

451614

Sigma-Aldrich

Carbonato di sodio, anhydrous, powder, 99.999% trace metals basis

215619

Sigma-Aldrich

Silicon, powder, −325 mesh, 99% trace metals basis

A3795

Sigma-Aldrich

Ammonium nitrate, suitable for plant cell culture

646687

Sigma-Aldrich

Silicon, wafer (single side polished), <100>, N-type, contains no dopant, diam. × thickness 2 in. × 0.5 mm

S7795

Sigma-Aldrich

Carbonato di sodio, BioXtra, ≥99.0%

647101

Sigma-Aldrich

Silicon, wafer (single side polished), <111>, N-type, contains no dopant, diam. × thickness 2 in. × 0.5 mm

633097

Sigma-Aldrich

Silicon, nanopowder, <100 nm particle size (TEM), ≥98% trace metals basis

S4132

Sigma-Aldrich

Sodium carbonate monohydrate, ReagentPlus^®, ≥99.5%

256064

Sigma-Aldrich

Ammonium nitrate, 99.999% trace metals basis

71345

Sigma-Aldrich

Carbonato di sodio, BioUltra, anhydrous, ≥99.5% (calc. on dry substance, T)

647764

Sigma-Aldrich

Silicon, wafer (single side polished), <100>, P-type, contains boron as dopant, diam. × thickness 3 in. × 0.5 mm

13568

Sigma-Aldrich

Sodium carbonate monohydrate, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, 99.5-100.5% (ex dried subst.)

56169

Supelco

Sodium carbonate concentrate, 0.1 M Na₂CO₃ in water, eluent concentrate for IC

71363

Supelco

Carbonato di sodio, reference material for titrimetry, certified by BAM, >99.5%

577782

Sigma-Aldrich

Sodium carbonate decahydrate, 99.999% trace metals basis

647675

Sigma-Aldrich

Silicon, wafer (single side polished), <100>, P-type, contains boron as dopant, diam. × thickness 2 in. × 0.5 mm

72784

Supelco

Sodium carbonate concentrate, Na₂CO₃ 72 mM in water, IC eluent concentrate (20x) for Metrosep A Supp 7

900503

Sigma-Aldrich

Carbonato di sodio, anhydrous, powder or granules, free-flowing, Redi-Dri^™, ACS reagent, ≥99.5%

343250

Sigma-Aldrich

Silicon, pieces, 99.95% trace metals basis

647535

Sigma-Aldrich

Silicon, wafer (single side polished), <100>, N-type, contains no dopant, diam. × thickness 3 in. × 0.5 mm

647799

Sigma-Aldrich

Silicon, wafer (single side polished), <111>, N-type, contains phosphorus as dopant, diam. × thickness 2 in. × 0.5 mm