Sample Containers, Preservation, and Holding Times

Table of Containers, Preservation, and Holding Times for various Analyses

Analysis Min Volume Container Type Preservative Holding Time
% Solids / Density 500 g Plastic Ice 28 days
Ammonia-N (by ISE) 500 ml Plastic H2SO4, pH < 2, Ice 28 days
BOD 1 L Plastic Ice 48 hours
CBOD 1 L Plastic Ice 48 hours
Chloride 500 ml Plastic Ice 28 days
Chlorophyll A / Pheophytin 1 L Amber Plastic Ice 21 days
Dis. Orthophosphate - P 500 ml Plastic Field Filtered, Ice 48 hours
E. coli 120 ml Sterile STS, ICE 6 hours
Fecal Coliform 200 ml Sterile STS, ICE 6 hours
Metals 500 ml Plastic HNO3, pH < 2, Ice 6 months
MLSS / MLVSS 25 ml Plastic Ice 7 days
Nitrate - Nitrite 500 ml Plastic H2SO4, pH < 2, Ice 28 days
Oil & Grease 500 ml Glass H2SO4, pH < 2, Ice 28 days
Sulfate 500 ml Plastic Ice 28 days
T. Hardness (as CaCO3) 500 ml Plastic HNO3, pH < 2, Ice 6 months
T. Phosphorus 500 ml Plastic H2SO4, pH < 2, Ice 28 days
TDS 100 ml Plastic Ice 7 days
TSS 500 ml Plastic Ice 7 days

For analyses not listed, such as organics, TCLP, etc., please contact the ANRA Laboratory Manager at 936-633-7527.

ANRA reserves the right to subcontract samples to other certified laboratories if we are unable to perform the requested analyses. This includes testing for parameters that we do not normally analyze in-house, as well as routine samples if scheduling or workflow dictates.