In the following example, a laboratory report is presented in the form of a brief memorandum.
| To: | B. Renner, Manager, Boiler Group |
| From: | D. Hein, Analytical Group |
| Date: | 2/19/93 |
| Subject: | Analysis of VCGx-Boiler Cleaning Solution |
The following sample was received for analysis of its sulfate, nitrate, fluoride, and magnesium content:
The following amounts of the substances were found in the sample:
| Lab No. | Sample I.D. | Parameter | Results as ppm |
|---|---|---|---|
| G1457 | VCGx | SO4 | 90,000 |
| NO3 | 3 | ||
| F | <1 | ||
| Ca | 10 | ||
| Mg | 5 |
A 10% solution of the sample was prepared and analyzed for the parameters listed above. The anions (SO4 and NO3) were analyzed on the filtered sample by the automated method (Lab Test Nos. 33052-B and 33053-B), using the Technical Auto Analyzer II systems. The high sulfate content of the sample made it necessary to dilute the sample one hundredfold. The Fluoride content was determined by the electrode method (Lab Test no. F4805-A). Analysis of the metals (Ca and Mg) was carried out by the flame atomic absorption method (Lab Tests Nos. G4040-F and G4045-F) using the Perkins-Elmer Model 403 AA. An aliquot of shaken sample was dissolved in 0.5% nitric acid and 5% hydrochloric acid prior to analysis of the metals.
