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Table 3

Parameter Method Reference1 Container2 Preservation3 Maximum Holding Times
Bromide DPD Colorimetric5 SM 408E P, G None required Analyze immediately
Bromates Ion Chromatogrpahy EPA-SOP (300.0)6 P, G Cool, 4°C 30 days
Chlorophlls Spectrophotometric SM 1002G P, G7 14 d in dark 30
Corrosivity Calculated (CaCO3 Stability, Langelier Index) SM 203 ASTM 0513-82 P, G Cool, 4°C8 7 days8
Odor Human Panel SM 207 G only Cool, 4°C 6 hours
Salinity Electrometri9 Hydrometric Argentometric SM 210A G, Wax seal Analyze immediately or use wax seal 30 days9
Taste Human Panel SM 211
A,B ASTM 1292-86
G only Cool, 4°C 24 hours
Transparency Irradiometric10 17-3.021 FAC —- —- Analyze
Un-ionized Ammonia Calculated11 DER-SOP12 P, G Cool, 4°C Na2S2O311 8 hours unpreserved 28 days preserved11
Organic Pesticides13 GC and HPLC EPA
14 14 14


  1. SM XXX – procedures from "Standard Methods for the Examination of Water and Wastewater", APHA-AWWA-WPCF, 16th Edition, 1985.
  2. P – plastic, G – Glass
  3. When specified, sample preservation should be performed immediatley upon sample collection.
  4. The times listed are the maximum times that samples may be held before analysis and still be considered valid.
  5. The approved procedure is fokr residual chlorine. However, in the absence of chlorine, the DPD colorimetrick procedure can be adapted to measure bromine content of the sample. Inc such case, the validity of this assumption must be verified by using another procedure for chlorine which is not affected by the presence of bromine (i.e., negligible interference).
  6. "Determination of Inorganic Disinfection By-Products by Ion Chromatography, Method 300.0" by John D. Pfaff and Carol A. Brockoff, U.S. EPA, Cincinnati, Ohio 45268 (copy available from the DER QA Section).
  7. Collect sample in opaque bottles and process under reduced light. Samples on filter taken from water having pH 7 or higher may be placed in airtight plastic bags and stored frozen for up to three weeks. Samples from acidic water must be processed promptly to prevent chlorophyll degradation.
  8. Temperature and pH must be measured on site at the time of sample collection. Seven days is the maximum time for laboratory analysis of total alkalinity, calcium ion and total solids.
  9. The electrometric and hydrometric analytical methods are suited for field use. The argentometyric method is suited for laboratory use. Samples collected for laboratory analysis, when properly sealed with paraffin waxed stopper, may be held indefinitely. The maximum holding time of 30 days is recommended as a practical regulatory limit.
  10. Transparency in surface waters is defined as a compensation point for photosynthetic activity, i.e., the depth at which one percent of the light intensity entering at the water surface remains unabsorbed. The DER rule 17-3 FAC requires that the light intensities at the surface and subsurface be measured simultaneously by irradiance meters such as the Kahlsico Underwater Irradiometer, Model No. 268 WA 310, or an equivalent device having a comparable spectral response.
  11. The results for the measurements of pH, temperature, salinity (if applicable) and the ammonium ion concentration in the sample are used to calculate the concentration of ammonia in the unionized state. Temperature, pH and salinity must be measured on site at the time of sample collection. Laboratory analysis of the ammonium ion concentration should be conducted within eight hours of sample collection. If prompt analysis of ammonia is impossible, preserve samples with H2SO4 to pH between 1.5 and 2. Acid-preserved samples, stored at 4C, may be held up to 28 days for ammonia determination. Sodium thiosulfate should only be used if fresh samples contain residual chlorine.
  12. DER Central Analytical Laboratory, Tallahassee, FL, Revision No. 1, October 3, 1983. The 1983 draft is available from the DER QA Section.
  13. Other pesticides listed in approved EPA methods (608.1, 608.2, 614, 614.1, 615, 617, 618, 619, 622, 622.1, 627, 629, 631, 632, 632.1, 633, 643, 644 and 645) which are not included in Table 10 of 40 CFR Part 136 (July 1989).
  14. Container, preservation and holding time as specified in each individual method shall be followed.