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Illinois State Water Survey Health and Environmental Application Laboratory Standard Operating Procedure: Total Dissolved Solids, 20241219

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Standard Operating Procedure: Sample Receipt, Handling, and Storage V 1.0 Aho Lab, Boston University

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Boston University Aho Lab Standard Operating Procedure: Preparation, Evacuation, and Shipping of Gas Sample Vials, V2

FIU Center for Aquatic Chemistry and Environment - Nutrient Analysis Core Facility: Determination of Filtered Nutrients in Water, rev. 12

FIU Center for Aquatic Chemistry and Environment - Nutrient Analysis Core Facility: Determination of Total Nitrogen in Water, rev. 11

FIU Center for Aquatic Chemistry and Environment - Nutrient Analysis Core Facility: Determination of Total Phosphorus in Water, Sediments, Soil and Tissue Samples, rev. 11

Colorado State University Water Quality Assurance Plan Soil, Water, and Plant Testing Laboratory 2015

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EcoCore - Directions for running NH4/NO3 analyses on the Alpkem

EcoCore - Directions for running NO2 analyses on the Alpkem

EcoCore - Directions for running low level Ortho-Phosphate samples on the Alpkem

EcoCore - LECO (TruSpec CN) - Quick Reference Guide, last updated 2011-09-26

EcoCore - NEON water chemistry UV absorbance protocol, last updated 2014-12-30

EcoCore - Standard Preparation for NO3, NO2, PO4, and NH4 analysis, last updated 2015-02-20