Di Water Conductivity Specification

Maximum conductivity of 0 056 microsiemens cm max.

Di water conductivity specification. Come visit the biggest lab supply showroom in the california or contact us online or at 888 452 2776. The maximum conductivity range for deionized water is 5 10 6. For defluxing cleaning applications the recommended di water quality should be 1 to 10 microsiemens cm. The resistivity is the reciprocal of the conductivity.

Water molecules dissociate into ions as a function of ph and temperature and result in a very predictable conductivity. Deionized water di water diw or de ionized water often synonymous with demineralized water dm water is water that has had almost all of its mineral ions removed such as cations like sodium calcium iron and copper and anions such as chloride and sulfate deionization is a chemical process that uses specially manufactured ion exchange resins which exchange hydrogen and hydroxide ions. The conductivity of water conductivity is reported as microsiemens per centimeter µs cm at 25oc and is the reciprocal of resistivity and provides a measure of a fluid s ability to conduct electrical current. For comparison the conductivity of distilled water in equilibrium with co 2 in the air is about 20 000 µs cm.

To implement a coherent classification system for water purity we make use of several key factors describing the various properties of water. Therefore at 25 c 18 2 megohm water which is the highest purity water obtainable also has a conductivity of 0 055 µs cm. Conductivity and resistivity are mathematical reciprocals of each other. Any conductivity that is higher than 10 microsiemens cm is not recommended.

Link to spec at techstreet. Good quality di water is perhaps 18 meg a ohm cm water from mixed bed polishing. That afore mentioned range corresponds to 1 to 0 1 megohm cm. Microsiemmens or conductivity is also used as a measurement of di water standard tap water is brought to a temperature of about 72 degrees f and run though a pre filter system consisting of a 25 micron sediment filter 25 micron carbon filter and either a water softener filter or.

For over 40 years lab pro has been committed to delivering the highest quality chemicals reagents and cleaning solutions to medical and biotechnical laboratories worldwide. Technical standards on water quality have been established by a number of organizations including the american society for testing and materials astm international organization for standardization iso united states pharmacopoeia usp and the clinical and laboratory standards institute clsi previously known as the us national committee for clinical laboratory standards nccls. Silica 3 ppb max. Siemen s mho 1 ohm.

Chloride 1 ppb max. It is standard practise to correct conductivity and resistivity to 25 c a process which is carried out automatically by modern conductivity meters.