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Inorganic Standards
Atomic Absorption Standards
Ionization Buffers
Matrix Modifiers
Releasing Agents
Single Element 1,000ug/ml
Environmental Standards by Method Number or Name
EPA Method 200.11 Revision 2.1
200.11 Single Element Set
Calibration Standards
Lab Performance Check (LPC)
Laboratory Fortifying Stock Solutions
Quality Control Standard
EPA Method 200.15 Revision 1.2
200.15 Single Element Set
Calibration Standards
EPA Method 200.7
Interference Check Standards
EPA Method 200.7 Revision 3.3
200.7 Rev3.3 Single Element Set
Laboratory Fortifying Stock Solutions
Laboratory Performance Check (LPC) Standard
Mixed Calibration Standards
Quality Control Standards
Tuning Solution
EPA Method 200.7 Revision 4.4
200.7 Rev4.4 Single Element Set
Instrument Performance Check
Lab Fortifying Solutions
Mixed Calibration Standards
Plasma Solution
Quality Control Standards
EPA Method 200.8 Revision 5.4 and 4.4
Calibration Standards
Internal Standard Solution
Quality Control Standards
Tuning Solution
EPA Method 200.9 Revision 2.2
200.9 Matrix Modifier
200.9 Single Element Set
EPA Method 300.0 Revision 2.1
300.0 Eluent Concentrates
300.0 Multi Anion Standards
300.0 Single Anion Sets
EPA Method 6020 CLP-M
Calibration Standard
CRDL Standard
Instrument Check Standards
Interference Check Standards
Internal Standard
Memory Check Standards
Spike Standards
Tuning Solution
Superfund CLP for GFAA
Calibration Standard
CCV/ICV Standard
GFAA Set
Mercury Standard
Postdigestion Spike Standard
Predigestion Spike Standard
Superfund CLP for ICP-AES
CRQL and CRDL Standards
Initial Calibration Verification
Instrument Calibration
Interference Check Standards
Spike Sample Analysis
Superfund CLP for ICP-MS
Calibration Standard
CCV/ICV Standard
CLP-MS Set
CRQL Standard
Interference Check Solution
Internal Standard Solution
Spike Standard
Tuning Solution
TCLP
TLCP Standards
Water Standards
Drinking Water Pollutant Standards
Groundwater and Wastewater Pollution Control Check Standards
ICP Standards and ICP-MS Standards
68 Element Standard
Calibrate and Matrix Blanks
Custom Standards
Gold Blank Standard
ICP Single Element Sets
ICP Standards - Single Elements
ALUMINUM
OSMIUM
ANTIMONY
ARSENIC
BARIUM
BERYLLIUM
BISMUTH
BORON
CADMIUM
CALCIUM
CARBON
CERIUM
CESIUM
CHROMIUM (+3)
CHROMIUM (+6)
COBALT
COPPER
DYSPROSIUM
ERBIUM
EUROPIUM
GADOLINIUM
GALLIUM
GERMANIUM
GOLD
HAFNIUM
HOLMIUM
INDIUM
IRIDIUM
IRON
LANTHANUM
LEAD
LITHIUM
LUTETIUM
MAGNESIUM
MANGANESE
MERCURY
MOLYBDENUM
NEODYMIUM
NICKEL
NIOBIUM
PALLADIUM
PHOSPHOROUS
PLATINUM
POTASSIUM
PRASEODYMIUM
RHENIUM
RHODIUM
RUBIDIUM
RUTHENIUM
SAMARIUM
SCANDIUM
SELENIUM
SILICON
SILVER
SODIUM
STRONTIUM
SULFUR
TANTALUM
TELLURIUM
TERBIUM
THALLIUM
THORIUM
THULIUM
TIN
TITANIUM
TUNGSTEN
URANIUM
VANADIUM
YTTERBIUM
YTTRIUM
ZINC
ZIRCONIUM
Instrument Calibration
Internal Standard Mixes
Multi-Element Standards
Quality Control Standards
Single Internal Standards
Tuning Solution
Ion Chromatography Standards
Eluent Concentrates
Ion Chromatography Multi-Element Standards
Multi Anion Standards
Multi Cation Standards
Single Anion Standards
Single Cation Standards

Products

Atomic Absorption Standards
Ionization Buffers
Matrix Modifiers
Releasing Agents
Single Element 1,000ug/ml
Environmental Standards by Method Number or Name
EPA Method 200.11 Revision 2.1
200.11 Single Element Set
Calibration Standards
Lab Performance Check (LPC)
Laboratory Fortifying Stock Solutions
Quality Control Standard
EPA Method 200.15 Revision 1.2
200.15 Single Element Set
Calibration Standards
EPA Method 200.7
Interference Check Standards
EPA Method 200.7 Revision 3.3
200.7 Rev3.3 Single Element Set
Laboratory Fortifying Stock Solutions
Laboratory Performance Check (LPC) Standard
Mixed Calibration Standards
Quality Control Standards
Tuning Solution
EPA Method 200.7 Revision 4.4
200.7 Rev4.4 Single Element Set
Instrument Performance Check
Lab Fortifying Solutions
Mixed Calibration Standards
Plasma Solution
Quality Control Standards
EPA Method 200.8 Revision 5.4 and 4.4
Calibration Standards
Internal Standard Solution
Quality Control Standards
Tuning Solution
EPA Method 200.9 Revision 2.2
200.9 Matrix Modifier
200.9 Single Element Set
EPA Method 300.0 Revision 2.1
300.0 Eluent Concentrates
300.0 Multi Anion Standards
300.0 Single Anion Sets
EPA Method 6020 CLP-M
Calibration Standard
CRDL Standard
Instrument Check Standards
Interference Check Standards
Internal Standard
Memory Check Standards
Spike Standards
Tuning Solution
Superfund CLP for GFAA
Calibration Standard
CCV/ICV Standard
GFAA Set
Mercury Standard
Postdigestion Spike Standard
Predigestion Spike Standard
Superfund CLP for ICP-AES
CRQL and CRDL Standards
Initial Calibration Verification
Instrument Calibration
Interference Check Standards
Spike Sample Analysis
Superfund CLP for ICP-MS
Calibration Standard
CCV/ICV Standard
CLP-MS Set
CRQL Standard
Interference Check Solution
Internal Standard Solution
Spike Standard
Tuning Solution
TCLP
TLCP Standards
Water Standards
Drinking Water Pollutant Standards
Groundwater and Wastewater Pollution Control Check Standards
ICP Standards and ICP-MS Standards
68 Element Standard
Calibrate and Matrix Blanks
Custom Standards
Gold Blank Standard
ICP Single Element Sets
ICP Standards - Single Elements
ALUMINUM
OSMIUM
ANTIMONY
ARSENIC
BARIUM
BERYLLIUM
BISMUTH
BORON
CADMIUM
CALCIUM
CARBON
CERIUM
CESIUM
CHROMIUM (+3)
CHROMIUM (+6)
COBALT
COPPER
DYSPROSIUM
ERBIUM
EUROPIUM
GADOLINIUM
GALLIUM
GERMANIUM
GOLD
HAFNIUM
HOLMIUM
INDIUM
IRIDIUM
IRON
LANTHANUM
LEAD
LITHIUM
LUTETIUM
MAGNESIUM
MANGANESE
MERCURY
MOLYBDENUM
NEODYMIUM
NICKEL
NIOBIUM
PALLADIUM
PHOSPHOROUS
PLATINUM
POTASSIUM
PRASEODYMIUM
RHENIUM
RHODIUM
RUBIDIUM
RUTHENIUM
SAMARIUM
SCANDIUM
SELENIUM
SILICON
SILVER
SODIUM
STRONTIUM
SULFUR
TANTALUM
TELLURIUM
TERBIUM
THALLIUM
THORIUM
THULIUM
TIN
TITANIUM
TUNGSTEN
URANIUM
VANADIUM
YTTERBIUM
YTTRIUM
ZINC
ZIRCONIUM
Instrument Calibration
Internal Standard Mixes
Multi-Element Standards
Quality Control Standards
Single Internal Standards
Tuning Solution
Conductivity Standards
Ion Chromatography Standards
Eluent Concentrates
Ion Chromatography Multi-Element Standards
Multi Anion Standards
Multi Cation Standards
Single Anion Standards
Single Cation Standards
pH Calibration Buffers

Custom Request

custom

TDS is the measure of total dissolved solids in fresh water sources. It includes inorganics and organics that typically can pass through a 2 micron filter. Measurement occurs in reality via conductivity. Cations and anions emit charges and are a source of this "conductivity". There are benchtop as well as portable field versions of these meters for convenience.

Conductivity refers to the electrical conductivity a solution exhibits. Typically it is available as KCl and not NaCl. The units are expressed as micro Mho's/cm or micro Seimens/cm (Seimens unit was the convention in Europe, mho's in the US in the past).The opposite of conductivity is resistivity and its unit is microohms/cm. One can calculate, for convenience, one or the other having just one specification by calculating the reciprocal value. Resistivity it commonly used in water purification systems.

Hardness refers to the amount of calcium and magnesium in water. A hardness solution will have a conductivity, and a separate hardness value expressed in equivalent CaCO3 units and also a TDS value in ppm. But the opposite is not necessarily true. You can have a conductivity and TDS and NOT a hardness if no Ca or Mg ions are present. Exaxol offers standards for Conductivity, both conductivity combined with TDS, and water standards for drinking water/wastewater for hardness as well. Use our search box or click quick links at the left margin of our website.

ISO Certification

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They have been providing a quality product at a fair price, and best of all, on time!