All Tests

71751-41-2

57960-19-7

Cd, Cr, Pb, Ni. This is a combined heavy metals test using acid digestion.

K, Ca, Mg, Na. This is a combined salts test using acid digestion.

pH, ECw, SAR, Ca, Mg, Na, HCO3+CO3, NO3-N, B, Cl, SO4-S, Fe, Mn. This is a combined test of multiple water quality factors.

Alkalinity. This method quantifies bicarbonate (HCO3 1-) and carbonate (CO3 2-) concentration in mmolc/L in the solution. The method detection limit is approximately 0.05 mmolc/L and is generally reproducible within ± 10%.

Al. This test method determines the concentration of aluminum by utilizing an acid digestion and determination by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The method has detection limits ranging from 0.1 mg/Kg. The method is generally reproducible within 8%.

Al(KCl).

This is a soil fertility test. This method involves the extraction of exchangeable aluminum from soils using 2.0 N KCl. Aluminum is determined by Inductively Coupled Plasma spectrometry (ICP-AES). The method doesn't quantitatively extract aluminum from mineral structures or bound to organic compounds. Soil aluminum concentrations are generally low in mineral soils. The method detection limit is approximately 0.5 mg/kg and is generally reproducible ± 10%.

Arginine, Hydroxylysine, Lysine, Glutamine, Asparagine, Alanine, Threonine, Glycine, Valine, Hydroxyproline, Serine, Proline, Isoleucine, Leucine, Methionine, Norleucine, Histidine, Aspartate, Glutamate, Phenylalanine, Cystine, Tyrosine, p-Arginine, p-Serine, p-Threonine, p-Tyrosin

NH4-N. This method involves the quantitative analysis of ammonium (NH4-N) and nitrate (NO3-N) in water. Ammonium and nitrate are measured by the diffusion-conductivity method based on the gaseous diffusing of ammonia (NH3) across a gas permeable membrane in the presence of excess base (KOH) and subsequent conductivity detection. The method has detection limit of approximately 0.05 mg/L and is generally reproducible within 7%.

Soluble Cl, SO4-S, NO3-N, PO4-P. This method quantitatively measures the concentration of sulfate and chloride, nitrate and phosphate in water samples.

As. This test is for arsenic. Samples are digested using perchloric and sulfuric acids. Values are determined by Inductively-Coupled Plasma Emission Spectrometer (ICP-AES). The method has a detection limit of 0.5 ug/L.

This method quantitatively determines the concentration of barium in botanical materials utilizing a nitric-perchloric acid digestion. Digest analyte concentrations are determined by atomic absorption spectrometry (AAS) and/or inductively coupled plasma atomic emission spectrometry (ICP-AES). The method detection limit is approximately 0.5 mg/kg. Ba.