All Tests

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The method determines the soil moisture retention capabilities under constant pressure. This helps to determine the available water holding capacity of soils and moisture release curve. The method detection limit is 0.5%. (0.33, 1, 5, 10, 15, or other atm). Price per each pressure measurement.

This method quantitatively determines the concentration of molybdenum 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. Mo.

Ni. This test method determines the concentration of nickel in a water sample by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES).The method has a detection limit of 0.005 mg/L.

This method quantitatively determines the concentration of nickel 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. Ni.

NO3-N. This is a soil fertility test. This method involves the extraction of nitrate from soils using 40 g (0.02 N) CaSO4 solution. Nitrate is determined by reaction with chromotropic acid to form an azochromophore (yellow dye) which is measured spectrophotometrically at 420 nm. Soil nitrate-nitrogen can be used to predict plant response to nitrogen fertilizers. The method detection limit is approximately 1.0 mg/kg and is generally reproducible ± 6%.

This method determines the concentration of nitrate-nitrogen in botanical materials. It is determined spectrophotometrically. The method detection limit is approximately 10 mg/kg (sample dry basis) and is generally reproducible to within ± 10.0%. NO3-N.

N.

This is a soil fertility test. The total nitrogen method is based on using sulfuric acid and digestion catalyst and conversion of organic nitrogen to the ammonium form. The procedure does not quantitatively digest nitrogen bound in carbon rings. The method has a detection limit of approximately 0.001 % N.

This package is a combination test for nitrogen, phosphorus and potassium. N, P, K.

This package determines the quantities of zinc, manganese, iron and copper. Zn, Mn, Fe, Cu.

Lactate, Acetate, Glycolate, Propionate, Formate, Butyrate, Pyruvate, Valerate, Galacturonate, Trifluoroacetat, Glutarat, Succinate, Malate, Malonate, Tartrate, Maleate, Oxalate, Fumarate, Citrate,

Cis-aconitate, and Trans-aconitate

OM-LOI.

This method the amount of oxidizable organic matter as determined by the gravimetric weight change associated with high temperature oxidation of soil organic matter in a muffle furnace. Soil organic matter values are used to estimate potential nitrogen mineralization, pesticide management and for crop production management. The method is generally reproducible within ± 20%.

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