Standard Solution definition of Standard Solution in the Free Online Encyclopedia.

standard solution [¦stan·dərd sə¦lü·shən]

(analytical chemistry)

Standard Solution

a solution with a known concentration of chemical reagent. Standard solutions are used in titrimetric analysis for establishing the quantity of a particular substance (analyte) by titrating to an equivalence point, usually determined by a change in color of a chemical indicator or of the titrated solution. In order to calculate the results, the amount (volume, sometimes weight) of the standard solution consumed in the reaction with the analyte is established. The accuracy of the determinations depends on the accuracy in establishing the concentration of the standard solution. The concentration of a standard solution is usually expressed in terms of normality. The titer also has certain practical applications.

Standard solutions are obtained in a number of ways. One method involves dissolving an exact weight of a substance in an exact volume of solvent. The substance must be chemically pure and must be stable during storage in solid form and in solution; the composition of this substance must correspond exactly to its chemical formula. A second method involves titration with another solution having a known concentration. This method is convenient in that it does not require exact weighings to determine the concentration of many solutions. Standard solutions can also be prepared by using titrants in the form of dry substances or solutions in amounts required for the preparation of 1 liter of solution of a given concentration. These titrants are produced industrially and are marketed in sealed glass ampuls. Standard solutions must be stored under conditions that ensure a constant composition; here, the chemical nature of the solute must be taken into account.

REFERENCES

Kolthoff, I. M., and V. A. Stenger. Ob’emnyi analiz, vol. 1. Moscow-Leningrad, 1950. (Translated from English.)
Kreshkov, A. P. Osnovy analiticheskoi khimii, 3rd ed. [vol. 2]. Moscow, 1970.
Alekseev, V. N. Kolichestvennyi analiz, 4th ed. Moscow, 1972.

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No references found			The system and the IC method are checked using various standard solutions as well as a sample solution spiked after sample preparation. Determining biogenic amines in fish by Food Trade Review B] (2) where V is the volume of NaOH standard solution used while titration (ml), [V. Superabsorbent composite. X. effects of saponification on properties ... by Zhang, Junping; Li, An; Wang, Aiqin / Polymer Engineering and Science These include driving new applications to market, accelerating recapitalization of older systems and leveraging Nordson standard solutions. Nordson Corporation by Nonwovens Industry			standard parallel port standard penetration resistance standard penetration test standard performance standard pile standard pipe size Standard Pitch standard plane Standard Potential standard preemphasis standard pressure standard project flood standard propagation standard railing standard rate turn Standard Reference Material standard refraction standard sand standard sand Ottawa sand standard schnauzer standard score standard screen HDTV standard seawater standard semantics standard shaft Standard Solution standard source standard source A standard source B standard source C standard special standard star Standard State standard station standard subroutine standard target Standard TCP/IP Port standard temperature and pressure standard terminal arrival route standard test-tone power Standard Time Standard Time in the Ussr standard tolerance standard ton standard trajectory standard visibility standard visual range standard volume standard waveguide Standard Weight of Agricultural Products Standard Widget Toolkit			Standard Service Program Standard Service Revolver Standard Service Supply Standard Service Volume Standard Serviceability Test Standard Setting Body Standard Settlement Instruction standard shaft Standard Ship's Organization & Regulation Manual Standard Shipyard Procedure Standard simplex Standard simplex Standard simplex Standard Simulation Interface Design Standard Simulator Data Base Standard Simulator Database Interchange Format Standard Single Account File Standard Single Mode Fiber Standard Single-Sided Single-Layered DVD Disc Standard Slit Interdigital Micro Mixer Standard Small Computer Standard Small Launch Vehicle Standard Smoker Standard social science model Standard Software Requirements Contract Standard Software/Supply System Standard Solution standard source standard source A standard source B standard source C Standard South African English Standard Southern British English standard special Standard Special Provisions Standard Specific Gravity Standard Specification for Ship Repair and Alteration Committee Standard Specifications for Public Works Construction Standard Specifications for Road and Bridge Construction Standard Spectrum Resource Format Standard Spending Assessment Standard Spoken American English Standard Squirrel Cage Motor standard star Standard state Standard State Zoning Enabling Act Standard Statement Of Requirement standard station Standard Statistical Establishment List Standard Statistical Region Standard streams