GFS Chemicals, Standards
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In-Spec® Visible Standard 0.1
GFS ChemicalsNIST Traceable, non-toxic reference material for the visible spectrophotometer. Full visible scan reported with a typical absorbance at 600 nm in 10 mm pathlength being approximately 0.072.
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TEST Turbidity (Hach 2100N/AN and IS meters) 0.1 NTU Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material
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AMCO Clear® Turbidity Standard, 30 NTU
GFS ChemicalsTEST Turbidity 30 NTU +/- 0.3 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material
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Benzoic Acid Primary Standard
GFS ChemicalsC6H5COOH CAS#: 65-85-0 F.W.: 122.12 Meets all ACS Specifications
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AMCO Clear® Turbidity Standard, 40 NTU
GFS ChemicalsTurbidity 40 NTU +/- 0.4 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material
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TEST Turbidity (on Hanna HI 9829) 200 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material
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TEST Turbidity (on Turner C3 sensor) 3000 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material
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Kit contains 0.0, 20, 200, 1000 and 4000 NTU standards required to calibrate the Hach 2100N/AN instruments. The deluxe kit also contains sealed secondary standards of each value.
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POTASSIUM DICHROMATE , CERTIFIED P.S.
GFS ChemicalsStandardization of Ferrous Sulfate, Sodium Thiosulfate
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AMCO Clear® Turbidity Standard, 50 NTU
GFS ChemicalsTEST Turbidity 50 NTU +/- 0.5 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material
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Nitrite, 1,000 ppm, Ion Chromatography Standard Solution
GFS ChemicalsConcentration (as nitrite) 1,000 +/- 10 ug/mL Matrix: sodium nitrite, water Refrigerate to maximize shelf life
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Copper 1,000 ppm ICP Standard Solution
GFS ChemicalsConcentration 1,000 +/- 10 ug/ml Matrix: 5% Nitric acid NIST Traceable
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Refractory Elements II Multielement Standard
GFS Chemicals100 ppm each element in 5% hydrochloric acid with a trace of HF. Aluminum 100 +/- 1 ug/mL Boron 100 +/- 1 ug/mL Chromium 100 +/- 1 ug/mL Hafnium 100 +/- 1 ug/mL Molybdenum 100 +/- 1 ug/mL
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AMCO Clear® Turbidity Standard, 25 EBC
GFS ChemicalsTEST Turbidity (Haze) 25 EBC +/-0.2 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material
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Phosphorus 10,000 ppm ICP Standard Solution
GFS ChemicalsConcentration 10,000 +/- 100 ug/ml Matrix: 5% Nitric acid NIST Traceable
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AMCO Clear® Turbidity Standard, 5 EBC
GFS ChemicalsTEST Turbidity (Haze) 5.0 EBC +/-0.1 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material
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Zinc 1,000 ppm ICP Standard Solution
GFS ChemicalsConcentration 1,000 +/- 10 ug/ml Matrix: 5% Nitric Acid NIST Traceable
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TEST Turbidity (on LaMotte 2020) 100 NTU +/-1 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material
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Sulfur 1,000 ppm ICP Standard Solution
GFS ChemicalsConcentration 1,000 +/- 10 ug/ml Matrix: Ammonium sulfate in water NIST Traceable
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Aluminum 1000 ppm ICP Standard Solution
GFS ChemicalsConcentration 1,000 +/- 10 ug/ml Matrix: 5% nitric acid NIST Traceable
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In-Spec® Visible Standard 4.0
GFS ChemicalsNIST Traceable, non-toxic reference material for the visible spectrophotometer. Full visible scan reported with a typical absorbance at 600 nm in 10 mm pathlength being approximately 2.917.
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In-Spec® UV Standard #3
GFS ChemicalsNIST Traceable, non-toxic reference material for the UV spectrophotometer. Full UV scan reported with a typical absorbance at 300 nm in 10 mm pathlength being approximately 0.079.
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In-Spec® UV Standard #20
GFS ChemicalsNIST Traceable, non-toxic reference material for the UV spectrophotometer. Full UV scan reported with a typical absorbance at 300 nm in 10 mm pathlength being approximately 0.508.
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TEST Turbidity (AQ4500) EPA mode 1 NTU +/- 0.05 Turbidity (AQ4500) ISO Neph. mode Turbidity (AQ4500) IR Ratio mode Thermo Electron AQ4500 serial number Instrument calibration date Formazi
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In-Spec® Wavelength Verification Standard, Holmium Oxide
GFS ChemicalsHolmium oxide (4%) in 10% v/v perchloric acid. For the verification of the UV-Visible spectrophotometer wavelength scale.
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AMCO Clear® Turbidity Standard, 0.1 NTU
GFS ChemicalsFor all EPA 180.1 turbidimeters. TEST Turbidity 0.1 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material
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Thallium 1,000 ppm ICP Standard Solution
GFS ChemicalsConcentration 1,000 +/- 10 ug/ml Matrix: 5% Nitric acid NIST Traceable