Silicon Standard Solution 100ml Merck

A silicon standard solution traceable to a NIST SRM (Standard Reference Material) is a high-purity chemical solution, typically containing 1000 mg/L1000 space m g / cap L1000 / of silicon (Sicap S i), prepared for calibrating analytical instruments like ICP-OES and AAS. Its key feature is that its concentration is traceable to a certified silicon reference material from the U.S. National Institute of Standards and Technology, which ensures accuracy and reliability for measurements. The solution comes in different matrices, such as acidic aqueous solutions with ammonium hexafluorosilicate ((NH4)2SiF6open paren cap N cap H sub 4 close paren sub 2 cap S i cap F sub 6(4)26) or alkaline solutions with silicon dioxide (SiO2cap S i cap O sub 22) in sodium hydroxide (NaOHcap N a cap O cap H).General characteristics 

• Composition: A single-component solution with a specific concentration, most commonly 1000 mg/L1000 space m g / cap L1000 / of Si.
• Traceability: Traceable to a NIST SRM (such as SRM 3150), which is the basis for its accuracy and reliability.
• Matrix: The solution is prepared in a specific matrix, which can be acidic, such as water with hydrofluoric and nitric acids, or alkaline, such as 0.5 M NaOH0.5 space cap M space cap N a cap O cap H0.5 .
• Quality: Certified reference materials (CRMs) like these are produced according to international standards (e.g., ISO 17034) and are often suitable for specific methods, such as the EPA 200.7 method.
• Purpose: Used as a calibration standard in analytical techniques like Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and Atomic Absorption Spectroscopy (AAS).