1992-09-01_REVISION - M1988112

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 9/1/1992
• Doc Name: QUALITY ASSURANCE/QUALITY CONTROL-PROTOCOLS FOR THE COLLECTION OF SURFACE AND GROUND WATER
• Type & Sequence: TR6
• Media Type: D
• Archive: No

1
1
1

t
1
1

1
1
1
1
1

LJ

~~/~~
Western Atlas
International
...o.,o... ~.~.
CORE LABORATORIES
Till E
ANALYTICAL CHEMISTRY DIVISION QUALITY ASSURANCE MANUAL
SOP N0. REVISION N0. EFFECTIVE DATE PAGE
HC-QAC-02 0 1106!92 77 of 104
• Matrix spikes are not required for the majority of gravimetric parameters.
• For gravimetric sulfates, matrix spikes must be analyzed once per batch or
at a frequency of 10% of the sample population, whichever is greater.
Titrimetric Parameters
Titrant normality must be verified initially by analyzing a known reference
material (if available) or stock solution.
• Class A burets must be used for titrimetric parameters.
• At a minimum, buret readings should be recorded to 0.01 mL. Where
necessary, more accurate micro-burets should be used.
• A method blank and reference standard or stock standard (if available) must
be analyzed with each sample batch.
• Laboratory duplicates must be analyzed once per batch or at a frequency
of 10% of the sample population, whichever is greater.
• Matrix spikes (where applicable- must be analyzed once per batch or at a
frequency of 10% of the sample population, whichever is greater.
colorimetric Parameters
• At a minimum, spectrophotometers must be calibrated or checked annually.
• At a minimum, a 4-point calibration curve (b)ank and 3 standards) should
be used for the majority or colorimetric parameters.
• The correlation coefficient should be > 0.995 for the majority of
colorimetric parameters.
• Initial calibration blanks must be analyzed prior to field sample analysis.
• Continuing calibration blanks must be analyzed once per batch or at a
frequency of 10% of the sample population, whichever is greater.
i
i