{"product_id":"lead-sulfate-half-cell-ion-selective-electrode-ise-hi4012","title":"Lead\/Sulfate Half-Cell Ion-Selective Electrode (ISE) - HI4012","description":"\u003cp\u003eThe HI4012 lead\/sulfate selective electrode is a potentiometric half-cell sensor housed within an epoxy body. The internal elements are isolated from the sample by a compressed lead sulfide sensing membrane. This solid state sensor requires a separate reference electrode to complete the measurement system.\u003c\/p\u003e\n\u003cp\u003eHanna's solid state half-cell ISEs are designed for use with the HI5315 reference half-cell. The reference half-cell features a cone style junction. The skirted cone geometry of the reference forms the liquid junction with the test solution at the tip of the junction cone,  producing a highly stable reference potential and consistent flow rates of electrolyte into the solution. A simple press of the top portion of the ISE makes it easy to empty the electrolyte fill solution and replace when necessary.\u003c\/p\u003e\n\u003cp\u003eFor the HI4012 to measure lead accurately,  it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the lead ionic strength adjuster (ISA) solution. The ISA ensures that the activity coefficient is constant so the concentration of free lead ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI4012 lead\/sulfate solid state ISE can measure from 1µM (0.21 mg\/L) to 0.1M (20, 700 mg\/L).\u003c\/p\u003e\n\u003cp\u003eThe HI4012 can also be used as an indicator to follow the progress and detect the endpoint of a precipitation titration of sulfate. During the titration,  the lead\/sulfate ISE follows the lead concentration while a lead perchlorate solution is used to titrate the sample. The lead in the titrant solution reacts with the sulfate ions present in the sample to form a precipitate. Once all of the lead and sulfate ions have reacted,  a change in mV occurs to signal the endpoint,  and ultimately the sulfate concentration\u003c\/p\u003e\n\u003cp\u003eConversion Table for Pb\u003csup\u003e2+\u003c\/sup\u003e\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 0 0 32px;\"\u003e\u003ctable\u003e\n\u003ccolgroup\u003e\n\u003ccol width=\"220\"\u003e\n\u003ccol width=\"*\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003eMultiply\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003emoles\/L (M) to ppm (mg\/L)\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e2.072 x 10\u003csup\u003e5\u003c\/sup\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cp\u003eppm (mg\/L) to M (moles\/L)\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cp\u003e4.826 x 10\u003csup\u003e-6\u003c\/sup\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eFeatures at-a-glance\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFixed Sensing Modules\u003c\/strong\u003e - Solid state half-cell ISEs are electrodes that detect free ions in a solution. The highly insoluble,  compressed sensing pellet is attached to the HI4012 lead\/sulfate half-cell by a fixed sensing module for ease of use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDurable Epoxy Body\u003c\/strong\u003e - The probe body of the lead\/sulfate half-cell ISE is composed of durable epoxy resin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBNC Connection\u003c\/strong\u003e - The HI4012 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.\u003c\/p\u003e\n\u003ch2\u003eTheory of Operation\u003c\/h2\u003e\n\u003cp\u003eA solid state sensor electrode develops a voltage due to the ion exchange that occurs between the solution and the inorganic membrane. An equilibrium occurs due to the highly limited solubility of the membrane material in the sample. When the ionic strength of the solution is fixed by the addition of ISA,  the voltage is proportional to the concentration of free ions in solution.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e HI4012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003e Lead\/Sulfate Half-Cell Ion-Selective Electrode (ISE) - HI4012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription\u003c\/td\u003e\n\u003ctd\u003e solid state; half-cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e lead (Pb\u003csup\u003e2+\u003c\/sup\u003e) 0.1M to 1 10\u003csup\u003e-6\u003c\/sup\u003eM, 20,700 to 0.21 mg\/L (ppm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e 0 to 80 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e epoxy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimum pH Range\u003c\/td\u003e\n\u003ctd\u003e pH 4 to 7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\/Overall Length\u003c\/td\u003e\n\u003ctd\u003e 120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable\u003c\/td\u003e\n\u003ctd\u003e coaxial; 1 m (3.3’)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e BNC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNotes\u003c\/td\u003e\n\u003ctd\u003e Approximate Slope +27 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eManuals\u003c\/h3\u003e\u003cp\u003e\u003ca target=\"_blank\" href=\"https:\/\/manuals.hannainst.com\/HI4012\"\u003eLead\/Sulfate Half-Cell Ion-Selective Electrode (ISE) - HI4012\u003c\/a\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":67871287673201,"sku":"HI4012","price":97585.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/hi4012_2016.jpg?v=1792646070","url":"https:\/\/hannainst.in\/products\/lead-sulfate-half-cell-ion-selective-electrode-ise-hi4012","provider":"hanna","version":"1.0","type":"link"}