Analysis Of Potable Water For Trace Elements By Icp-Aes

METHOD 6010C INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROMETRY

SW-846 is not intended to be an analytical training manual. Therefore, method procedures are written based on the assumption that they will be performed by analysts who are formally trained in at least the basic principles of chemical analysis and in the use of the subject technology. In addition, SW-846 methods, with theexception of required method use for the analysis of method-defined parameters, are intended to be guidance methods which contain general information on how to perform an analytical procedure or technique which a laboratory can use as a basic starting point for generating its own detailed Standard Operating Procedure (SOP), either for its own general use or for a specific project application. Theperformance data included in this method are for guidance purposes only, and are not intended to be and must not be used as absolute QC acceptance criteria for purposes of laboratory accreditation.

1.0

SCOPE AND APPLICATION

1.1 Inductively coupled plasma-atomic emission spectrometry (ICP-AES) may be used to determine trace elements in solution. With the exception of groundwater samples, allaqueous and solid matrices need acid digestion prior to analysis. Groundwater samples that were prefiltered and acidified will not need acid digestion. Samples which are not digested need either an internal standard or should be matrix-matched with the standards. If either option is used, instrument software should be programmed to correct for intensity differences of the internal standard betweensamples and standards. Refer to Chapter Three, "Inorganic Analytes," for a listing of digestion procedures that may be appropriate. The following analytes have been determined by this method: Element Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chromium Cobalt Copper Iron Lead Lithium Symbol Al Sb As Ba Be B Cd Ca Cr Co Cu Fe Pb Li CAS Number 7429-90-5 7440-36-0 7440-38-27440-39-3 7440-41-7 7440-42-8 7440-43-9 7440-70-2 7440-47-3 7440-48-4 7440-50-8 7439-89-6 7439-92-1 7439-93-2 Element Mercury Molybdenum Nickel Phosphorus Potassium Selenium Silica Silver Sodium Strotium Thallium Tin Titanium Vanadium Symbol Hg Mo Ni P K Se SiO2 Ag Na Sr TI Sn Ti V CAS Number 7439-97-6 7439-98-7 7440-02-0 7723-14-0 7440-09-7 7782-49-2 7631-86-9 7440-22-4 7440-23-5 7440-24-6 7440-28-07440-31-5 7440-32-6 7440-62-2 Revision 3 February 2007

6010C - 1

Element Magnesium Manganese

Symbol Mg Mn

CAS Number 7439-95-4 7439-96-5

Element Zinc

Symbol Zn

CAS Number 7440-66-6

CAS Number: Chemical Abstract Service Registry Number.

1.2 Table 1 lists all of the elements for which this method was validated. The sensitivity and the optimum and linear ranges for eachelement will vary with the wavelength, spectrometer, matrix, and operating conditions. Table 1 lists the recommended analytical wavelengths and estimated instrumental detection limits (IDLs) for the elements in clean aqueous matrices with insignificant background interferences. Other elements and matrices may be analyzed by this method if appropriate performance at the concentrations of interest(see Sec. 9.0) is demonstrated. 1.3 Analysts should clearly understand the data quality objectives prior to analysis and must document and have on file the required initial demonstration performance data described in the following sections prior to using the method for analysis. 1.4 Prior to employing this method, analysts are advised to consult the each preparative method that may be employed in theoverall analysis (e.g., a 3000 series method) for additional information on quality control procedures, development of QC acceptance criteria, calculations, and general guidance. Analysts also should consult the disclaimer statement at the front of the manual and the information in Chapter Two for guidance on the intended flexibility in the choice of methods, apparatus, materials, reagents, and...