The need for CRMs for the validation and control of the analysis of water is steadily increasing as efforts to improve the quality of ground water and waste water increase.
The production and distribution of natural-water CRMs is beset with particular difficulties, including maintaining sterility without altering the matrix, the weight of liter volumes of water and the associated packaging. One consequence of these difficulties is there are very few whole-volume natural water CRMs available.
We have taken the procedures used to develop the range of water quality control RMs, which are supplied as concentrates, and used them to produce a range of water CRMs that suffer none of the problems associated with natural matrices, yet have analytical values and uncertainties comparable with the best whole-volume water CRMs.
Analytical data for certification was obtained using USEPA SW846, 3rd edition methods 3050 (hot block) and 3051 (microwave) using nitric acid extraction. Analysis was carried out according to USEPA method 6010 (ICP-EOS), 6020 (ICP-MS) and 7000 (AES).
All our constant value water CRMs are supplied in concentrate form, and when diluted according to the instructions supplied, will give the certified values,. But the analyst is free to dilute to a larger, or smaller, volumes to give a value at a particular value.
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Product Number: QCI-051
Anions C/V QC Sample
$55.00
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Product Number: QCI-052
Corrosivity/Sodium-constant value set
$54.00
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Product Number: QCI-047
A two-sample set for dilution up to 2 L of reagent water.
$40.00
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Product Number: QCI-040
Demand
$37.00
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Product Number: QCI-046
Minerals-constant value set
$65.00
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Product Number: QCI-042
Nutrients - Constant Value
$44.00
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Product Number: QCI-045
Oil & Grease C/V
$38.00
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Product Number: QCI-041
pH-Constant Value
$26.00
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Product Number: QCI-043
Phenolics C/V 2 Sample Set
$49.00
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Product Number: QCI-044
Residual Chlorine - Constant Value
$38.00
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