Buffers and Standards
Buffers and Standards
Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.
The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:
- Red: pH 4.0
- Yellow: pH 7.0
- Blue: pH 10.0
VeriSpec™ QC Standard, Ricca Chemical
CAS: 7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]
VeriSpec™ Internal Calibration Standard 7, Ricca Chemical
10 ppm: 6Li, Sc, Y, In, Tb, Bi /nManufactured and Tested in an ISO 17025/Guide 34 Facility
VeriSpec™ QC Standard 7A, Ricca Chemical
1000 ppm K, 500 ppm Si; 100 ppm Al, B, Ba, Na /nManufactured and Tested in an ISO 17025/Guide 34 Fac
VeriSpec™ QC Standard 27, Ricca Chemical
100 ppm: Al, Sb, As, Ba, Be, B, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Mo, Ni, K, Se, Si, Ag, Sr, Na, T
VeriSpec™ QC Standard 23, Ricca Chemical
1000 ppm Ag, Al, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, In, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Tl, Zn /n
VeriSpec™ Alternate Metals II, Ricca Chemical
500 ppm: Ca, Na; 100 ppm K, Mg /nManufactured and Tested in an ISO 17025/Guide 34 Facility
VeriSpec™ Mixed Cation Standard 6, Ricca Chemical
50 ppm Li+; 200 ppm Na+, K+, Mg2+; 400 ppm NH4+, 1000 ppm Ca2+ /nManufactured and Tested in
VeriSpec™ Interference Check Solution 12, Ricca Chemical
10K ppm Cl, 2000 ppm C; 1000 ppm Al, Ca, Fe, K, Mg, Na, P, S; 20 ppm Mo, Ti /nManufactured and Teste
VeriSpec™ Interference Check Solution A, Ricca Chemical
20,000 ppm Cl, Ca 3000 ppm; 2500 ppm Fe, Na; 2000 ppm C; 1000 ppm Al, Mg, P, K, S; 20 ppm Mo, Ti /nM
VeriSpec™ QC Standard 21, Ricca Chemical
100 ppm: As, Be, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Mo, Ni, Pb, Sb, Se, Sr, Ti, Tl, V, Zn /nManufac
VeriSpec™ Varian Calibration Standard, Ricca Chemical
1000 ppm Ca, Fe, K, Mg, Na; 10 ppm Ag, Al, As, Ba, Be, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Sb, Se, Th, T
VeriSpec™ Trace Metals in Water, Ricca Chemical
8K ppm Mg, 3200 ppm Ca, 2100 ppm Na, 2000 ppm K, 544 ppb Ba, 323 ppb Sr, 158 ppb B, 142 ppb Al, 121
VeriSpec™ Primary Interference Analytes, Ricca Chemical
5000 ppm: Al, Ca, Mg; 2000 ppm Fe /nManufactured and Tested in an ISO 17025/Guide 34 Facility
VeriSpec™ ICP Calibration Standard 15, Ricca Chemical
5 ppm: Al, As, Ba, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Se Sr, Zn; 50 ppm K /nManufactured and Tested in
VeriSpec™ Mixed Anion Standard 7, Ricca Chemical
150 ppm SO42-, PO43-; 100 ppm NO3-, Br-, NO2-; 30 ppm Cl-, 20 ppm F- /nManufactured and