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PAO Accredited Laboratories (as of Dec. 2012) - DTI

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Cl<strong>as</strong>s <strong>of</strong> Test/Product<br />

Specific Tests or<br />

Me<strong>as</strong>urements<br />

343 <strong>of</strong> 391<br />

Method Used/Reference<br />

Standard<br />

Muriate <strong>of</strong> Pot<strong>as</strong>h (MOP) Total K2O Volumetric Sodium<br />

Tetraphenyl Boron Method (STPB)<br />

/ AOAC 920.03 (18 th Ed.)<br />

.12 Soils Nitrogen (Total) Kjeltec Auto Analyzer or Rapid N III<br />

/ Protein Analyzer/ Modified<br />

Comprehensive Nitrogen method/<br />

Minor Nutrients<br />

Mg<br />

Co<br />

Cu<br />

Ca<br />

Fe<br />

Mn<br />

Mo<br />

Zn<br />

Phosphorus, Total<br />

(Total P2O5)<br />

(AOAC 978.02,18 th Ed.)<br />

Atomic Absorption<br />

Spectrophotometry/ AOAC 965.09<br />

(18 th Ed.)<br />

Molybdovanado-phosphate<br />

(Spectrophotometry)/ AOAC<br />

958.01 (18 th Ed.)<br />

Pot<strong>as</strong>sium (K2O) Sodium Tetraphenyl Borate<br />

(STPB)Titration/ AOAC 958.02<br />

(18 th Ed.)<br />

Boron (Carmine method)<br />

Spectrophotometry/ B<strong>as</strong>ed on<br />

SMEWW, 21 st Ed., 2005<br />

Sulfur Gravimetry<br />

2.41 Laboratory Reagents<br />

Caustic Soda NaOH (Sodium Hydroxide) Titrimetric method/ ASTM D501-03/<br />

E291-04/ USP 24<br />

Na2CO3 (Sodium Carbonate) Titrimetric method/ ASTM D501-03/<br />

E291-04/ USP 24<br />

NaCl (Sodium Chloride) Volhard method/ ASTM D501-03/<br />

E291-04/ USP 24<br />

Na2SO4 (Sodium Sulfate) Spectrophotometry/ ASTM D501-<br />

03/ E291-04/ USP 24<br />

SiO2 (Silicon Oxide) Spectrophotometry/ ASTM D501-<br />

03/ E291-04/ USP 24<br />

Fe (Iron) Spectrophotometry/ ASTM D501-<br />

03/ E291-04/ USP 24<br />

Sediments/Suspended Solids Gravimetric method/ ASTM D501-<br />

03/ E291-04/ USP 24<br />

Oil & Gre<strong>as</strong>e Gravimetric method/ ASTM D501-<br />

03/ E291-04/ USP 24<br />

Density Pycnometer/ ASTM D501-03/<br />

E291-04/ USP 24<br />

Al AAS<br />

Ca AAS<br />

Cu AAS<br />

Fe AAS<br />

Pb AAS<br />

Mg AAS<br />

Mn AAS<br />

Ni AAS<br />

Sr ICP-OES<br />

Soda Ash Na2CO3 (Sodium Carbonate) Titrimetric/ ASTM D501-03/ USP<br />

24<br />

Na2O (Sodium Oxide) Titrimetric/ ASTM D501-03/ USP<br />

24<br />

Fe (Iron) AAS (Air-Acetylene) / ASTM D501-<br />

03/ USP 24<br />

NaCl (Sodium Chloride) Volhard/ ASTM D501/ USP 24<br />

Sulfate Gravimetric/ ASTM D501-03/ USP<br />

24<br />

Loss on Heating Gravimetric/ ASTM D501-03/ USP

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