dc.contributor.author |
Archer, M
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dc.contributor.author |
De Vos, BJ
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dc.contributor.author |
Visser, MS
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dc.date.accessioned |
2007-07-02T07:47:42Z |
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dc.date.available |
2007-07-02T07:47:42Z |
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dc.date.issued |
2007-04 |
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dc.identifier.citation |
Archer, M, De Vos, BJ and Visser, MS. 2007. Preparation, assay and certification of aqueous ethanol reference solutions. Accreditation and Quality Assurance, Vol. 12(3-4), pp 188-193 |
en |
dc.identifier.issn |
0949-1775 |
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dc.identifier.uri |
http://hdl.handle.net/10204/834
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dc.description |
http://www.springerlink.com/content/k61xlj60250h328p/?p=b7ac90323ec2460985dfcd591f22e41e&pi=11 |
en |
dc.description.abstract |
Internationally, certified ethanol reference materials are required to calibrate breathalysers and blood-alcohol measurement instruments. The CSIR National Metrology Laboratory of South Africa provides certified aqueous ethanol solutions with traceability to the SI. Ethanol solutions in the concentration range 10 mg/100 g to 20 g/100 g are prepared gravimetrically by mixing ethanol and reagent quality water. To verify the concentration of the ethanol it is oxidized to acetic acid with potassium dichromate in the presence of sulphuric acid. The unreacted potassium dichromate is back-titrated with sodium thiosulphate. The method utilizes gravimetry and titrimetry, which are both primary methods. This paper addresses aspects of ethanol-certified reference materials that have not been previously published: traceability, stability of unpreserved ethanol solutions, homogeneity, quality control measures and the effect of reproducibility on the measurement uncertainty |
en |
dc.language.iso |
en |
en |
dc.publisher |
Springer |
en |
dc.subject |
Ethanol |
en |
dc.subject |
Certified reference materials |
en |
dc.subject |
Traceability |
en |
dc.subject |
Titrimetry |
en |
dc.subject |
Gravimetry |
en |
dc.subject |
Primary methods |
en |
dc.title |
Preparation, assay and certification of aqueous ethanol reference solutions |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Archer, M., De Vos, B., & Visser, M. (2007). Preparation, assay and certification of aqueous ethanol reference solutions. http://hdl.handle.net/10204/834 |
en_ZA |
dc.identifier.chicagocitation |
Archer, M, BJ De Vos, and MS Visser "Preparation, assay and certification of aqueous ethanol reference solutions." (2007) http://hdl.handle.net/10204/834 |
en_ZA |
dc.identifier.vancouvercitation |
Archer M, De Vos B, Visser M. Preparation, assay and certification of aqueous ethanol reference solutions. 2007; http://hdl.handle.net/10204/834. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Archer, M
AU - De Vos, BJ
AU - Visser, MS
AB - Internationally, certified ethanol reference materials are required to calibrate breathalysers and blood-alcohol measurement instruments. The CSIR National Metrology Laboratory of South Africa provides certified aqueous ethanol solutions with traceability to the SI. Ethanol solutions in the concentration range 10 mg/100 g to 20 g/100 g are prepared gravimetrically by mixing ethanol and reagent quality water. To verify the concentration of the ethanol it is oxidized to acetic acid with potassium dichromate in the presence of sulphuric acid. The unreacted potassium dichromate is back-titrated with sodium thiosulphate. The method utilizes gravimetry and titrimetry, which are both primary methods. This paper addresses aspects of ethanol-certified reference materials that have not been previously published: traceability, stability of unpreserved ethanol solutions, homogeneity, quality control measures and the effect of reproducibility on the measurement uncertainty
DA - 2007-04
DB - ResearchSpace
DP - CSIR
KW - Ethanol
KW - Certified reference materials
KW - Traceability
KW - Titrimetry
KW - Gravimetry
KW - Primary methods
LK - https://researchspace.csir.co.za
PY - 2007
SM - 0949-1775
T1 - Preparation, assay and certification of aqueous ethanol reference solutions
TI - Preparation, assay and certification of aqueous ethanol reference solutions
UR - http://hdl.handle.net/10204/834
ER -
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en_ZA |