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TOTAL DISSOLVED SOLIDS (TDS) FRESH WATER STANDARD, 415 ppm / Fresh Water Ion TDS (by conductivity method), EPA/APHA 'Hard' Synthetic Fresh Water Formulation, Hardness 160-180 mg/L as CaCO<sub>3</sub>, Ricca

TOTAL DISSOLVED SOLIDS (TDS) FRESH WATER STANDARD, 415 ppm / Fresh Water Ion TDS (by conductivity method), EPA/APHA 'Hard' Synthetic Fresh Water Formulation, Hardness 160-180 mg/L as CaCO₃, Ricca

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CAT NO: 8664-1, 8664-32

TOTAL DISSOLVED SOLIDS (TDS) FRESH WATER STANDARD, 830 ppm / Fresh Water Ion TDS (by conductivity method), EPA/APHA 'Very Hard' Synthetic Fresh Water Formulation, Hardness 280-320 mg/L as CaCO<sub>3</sub>, Ricca

TOTAL DISSOLVED SOLIDS (TDS) FRESH WATER STANDARD, 830 ppm / Fresh Water Ion TDS (by conductivity method), EPA/APHA 'Very Hard' Synthetic Fresh Water Formulation, Hardness 280-320 mg/L as CaCO₃, Ricca

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CAT NO: 8665-1, 8665-32

TUNGSTEN ICP STANDARD, 1 mL = 1 mg W, 1,000 ppm W. , (W in 5% HNO<sub>3</sub>/trace HF), Ricca

TUNGSTEN ICP STANDARD, 1 mL = 1 mg W, 1,000 ppm W. , (W in 5% HNO₃/trace HF), Ricca

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CAT NO: 8701-4

TUNGSTEN ICP STANDARD, 1 mL = 10 mg W, 10,000 ppm W. , (W in 5% HNO<sub>3</sub>/trace HF), Ricca

TUNGSTEN ICP STANDARD, 1 mL = 10 mg W, 10,000 ppm W. , (W in 5% HNO₃/trace HF), Ricca

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CAT NO: 8706-4

TUNGSTEN STANDARD, 1 mL = 1 mg W, 1,000 ppm W., (Na<sub>2</sub>WO<sub>4</sub> in Water), Ricca

TUNGSTEN STANDARD, 1 mL = 1 mg W, 1,000 ppm W., (Na₂WO₄ in Water), Ricca

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CAT NO: 8700-16, 8700-4

Turbidity Standard (Formazin), 4000 NTU, LabChem

Turbidity Standard (Formazin), 4000 NTU, LabChem

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CAT NO: LC26290-1

Turbidity Standard, 10 NTU, Polymer Bead Suspension, Ricca

Turbidity Standard, 10 NTU, Polymer Bead Suspension, Ricca

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CAT NO: R8801000-500G

Turbidity Standard, 1000 NTU, Formazin, Ricca

Turbidity Standard, 1000 NTU, Formazin, Ricca

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CAT NO: 8825-16

URANIUM STANDARD, 1 mL = 1 mg U, 1,000 ppm U., [UO<sub>2</sub>(NO<sub>3</sub>)<sub2</sub>&#183;6H<sub>2</sub>O in Water], Ricca

URANIUM STANDARD, 1 mL = 1 mg U, 1,000 ppm U., [UO₂(NO₃)·6H₂O in Water], Ricca

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CAT NO: 8900-16, 8900-4

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