Preservatives

Ascorbic Acid
Ascorbic Acid – Applicable for various methods requiring dechlorination
Ascorbic Acid and NaOH Ascorbic Acid & NaOH – SM4500 or EPA 335.4 for total cyanide analyses in chlorinated matrices
HCl HCL – EPA 624, 524.2 & 8260 volatiles + 525.2 semi-volatile target organic lists + 1600 series trace level elemental scans
HNO3 HNO3 – EPA 200, 6000 & 7000 target elemental lists
H2SO4 H2SO4 – EPA 1664 oil & grease, 420.1 phenolics, SM5220D chemical oxygen demand & SM4500 target inorganic lists
H3PO4 H3PO4 – EPA 9060 & SM5301C for total organic carbon
Methanol Methanol – EPA 5035 method for purgeable organic compounds
Monochloroacetic Acid Monochloroacetic Acid – EPA 513.1 or 632 carbamate pesticides analyses in drinking water or wastewater matrices
Na2S2O3 Na2S2O3 – EPA 524.2 & 624 for total trihalomethanes + any use to de-chlorinate finished water prior to preservation or analyses
NaOH NaOH - SM4500 or EPA 335.4 for total cyanide analyses
(NH42)2SO4 (NH42)2SO4 – EPA218.6, 7199, 7196 & SM3500 for total hexavalent chromium (Cr6)
NH4Cl NH4Cl – EPA552.2 for total haloacetic acids used to de-chlorinate finished water prior to analyses
Reagent Water
Reagent Water – Applicable for various method requirements
Sodium Bisulfate
Sodium Bisulfate - EPA 5035 method for purgeable organic compounds
ZnAcetate/NaOH ZnAcetate/NaOH – SM4500 or EPA 376.2 for total sulfide