G7200-90210 (Rev. A) MassHunter Workstation Quick Start Guide 23
Analyze the samples
1 Prepare the following standards, samples, and each solutions to use for
analysis. The solutions should contain 0.5% HCl as well as nitric acid.
• Make up the following calibration standards by diluting SPEX
XSTC- 760A with nitric acid to approx. 1%. The concentration of the
undiluted solution is 100x that of drinking water quality standard.
• Dilute samples with nitric acid to approx. 1%
• Dilute Internal standard solution (P/N 5188- 6525) 200 times (for on- line
internal standard)
• Use of nitric acid (1 to 5%) is recommended for the cleaning solution, as
it will clean the introduction system better than pure water. If pure
water is used, residual memory may be washed out while introducing
acidic samples, affecting the quantitative measurement.
2 Select Run from the Sequence menu or click the icon on the toolbar to
open the Start Sequence dialog box.
3 Set the parameters to the desired values.
Calibration
curve ranges
SPEX XSTC-760A Na
(ppm)
Mg, K, Ca
(ppm)
Level 1 Blank HNO3 0 0
Level 2 1/1000 dilution (1/10 of standard) 10 5
Level 3 1/200 dilution (1/2 of standard) 50 25
Level 4 1/100 dilution (standard concentration) 100 50
For high-concentration Na, Mg, K, and Ca, it is safer to prepare their mixed standard
solutions separately instead of mixing with the SPEX mixed standard solution, so as to
prevent contamination with the reagent, particularly if the required concentration level is
1/100 of the standard.
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