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Search Products * In order to use the cart correctly, please make sure you have cookies enabled. Traditional Calibration Standards Conductivity Calibrating Standards Conductivity Calibrating In Single Use Pouches Salinity Standards 442 Formulations ORP-Oxidation/Reduction Standards pH Buffer Standards pH Calibrating Buffers In Single Use Pouches Turbidity Calibrating Standards Combination Standards for Multi-Parameter Sondes Special Calibration Standards Total Organic Carbon Standards Low-Level Conductivity Standards High-Accuracy Conductivity Standards Particle Turbidity Standards High Temperature pH Buffer Standards High-Accuracy pH Buffer Standards Support Products Aids For Dissolved Oxygen Measurements Aids For pH Measurements Pourite Anti-Bubble Additive For Solid Media Support Documents MSDS Certificate of Analysis Technical Notes Contact Information Contact Us

442 Formulations Units Of Measure “ppm” parts per million (milligram solids per kilogram solution) 442 Standards are formulated from sodium sulfate, sodium bicarbonate and sodium chloride in the ratio of 4:4:2 respectively. to represent the composition of natural surface water such as rivers, lakes and streams. Custom standards, at other levels are available on request, simply let us know what you need. Please contact susan@auricalcompany.com or at 800-615-8870 / 650-861-0647. Accuracy as referenced to NIST Standard Reference Materials or NIST method is ±1.0% @25°C. Traceability certificates available on request at no additional cost.   Item Part Number Size Price Quantity Add to Cart 442 Solution 0015 ppm 442-0015-3 1 LTR $22.00   442 Solution 0030 ppm 442-0030-3 1 LTR $22.00   442 Solution 0150 ppm 442-0150-3 1 LTR $22.00   442 Solution 0300 ppm 442-0300-3 1 LTR $22.00   442 Solution 1,000 ppm 442-1000-3 1 LTR $22.00   442 Solution 1,500 ppm 442-1500-3 1 LTR $22.00   442 Solution 1,500ppm 442-1500-4 4 LTR $37.00   442 Solution 1,500ppm 442-1500-8 20 LTR $76.50   442 Solution 3,000 ppm 442-3000-3 1 LTR $22.00   442 Solution 3,000 ppm 442-3000-4 4 LTR $37.00   442 Solution 7,000 ppm 442-7000-3 1 LTR $22.00   442 Solution 030K ppm 442-030K-3 1 LTR $22.00   © COPYRIGHT, AURICAL COMPANY, 2007 - 2010, ALL RIGHTS RESERVED.