Stabilised Formazine reference suspension for the determination of lucidity/opalescence according to European Pharmacopeia 6.0.

For dissolved oxygen determination by Winkler titration. Digits x 0.1 = mg/L DO in 25 mL. Stabilized sodium thiosulfate formulation Accurate results - when and where you need them Fast and Flexible Versatile Economical

Standard for calibrating and checking accuracy of ORP/Redox electrodes. The ZoBell's ORP/Redox Standard Solution exhibits temperature correlation between 0 - 30°C. The standard value is dependent on the reference electrode type.

Thomas No. C791Z40 and C753U42 For alkalinity determination by drop-count titration. 100 mL bottle Thomas No. C753V69 For formaldehyde determination by drop-count titration. 100 mL bottle Thomas No. C753V59 Multi-purpose sulfuric acid standard…

500 platinum-cobalt units

Demineralizer, plastic, portable, with hose. Special faucet adapter, plug, and resin. Used in Model 15-E Water Conditioning Demonstration Kit.

If you have ever questioned the result of an analytical test, you'll immediately appreciate the value of using standard solutions. These solutions contain a defined concentration of analyte, allowing you to quickly verify that instrument operation, reagent performance, and variations in operator…

If you have ever questioned the result of an analytical test, you'll immediately appreciate the value of using standard solutions. These solutions contain a defined concentration of analyte, allowing you to quickly verify that instrument operation, reagent performance, and variations in operator…

Stabilized sodium thiosulfate titrant

For accuracy checks in conductivity measurements. 5.37 g/L as NaCl. 10,000 µS/cm. 500 mL bottle.

For removal of sulfide interference prior to analyses

For total exchangeable acidity determination in soils. Used in test kit 2496000.

If you have ever questioned the result of an analytical test, you'll immediately appreciate the value of using standard solutions. These solutions contain a defined concentration of analyte, allowing you to quickly verify that instrument operation, reagent performance, and variations in operator…

If you have ever questioned the result of an analytical test, you'll immediately appreciate the value of using standard solutions. These solutions contain a defined concentration of analyte, allowing you to quickly verify that instrument operation, reagent performance, and variations in operator…

Sodium Hydroxide 1.00N, 1L pk/4

For sample dechlorination prior to analysis.

Sodium Thiosulfate Standard Solution, 0.025 N, 1 L

S5000 Silica Standard Solution, Silica, 0.5mg/L, 2.9L

Standard Cell Solution for Hach pHD Differential pH and ORP Sensors, packaged in resealable 500 mL bottle. Used to replenish standard cell chamber while replacing salt bridge.

For low range silica determination in visual test kits. Pack of 100 powder pillows

StablCal® Turbidity Standards for all Turbidimeters. USEPA accepted for calibration purposes StablCal® Stabilized Formazin Turbidity Standards are true Formazin dilutions developed for use in any turbidimeter Precise, Pre-mixed Formazin Solutions Based on Formazin Primary…

For carbon dioxide determination by drop-count titration

For chloride determination by argentometric titration

For chloride determination by argentometric buret titration.

For carbon dioxide determination by buret titration. Hach method 8233.

For determination of Tannin and Lignin by the Tyrosine method. Hach method 8193.

Total and/or Free Chlorine (Colorimetric or Titrimetric Method) and Fluoride (SPADNS Method)

For accuracy checks in conductivity measurements. 49 mg/L as NaCl. 100 µS/cm @ 25°C. 100 mL.

10 mg/L NH4-N Standard Solution, 2000mL

Multi-purpose sodium hydroxide solution for pH adjustment. 50 mL Self-Contained Dropping Bottle