EPA Method 376.1


ALS - Columbia offers EPA Method 376.1 testing at these laboratories:

Jacksonville Jacksonville, Florida Laboratory

Method information displayed is provided for informational purposes only. No warranty (express or implied) is made as to the website accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project). Please contact us for assistance. Analytical testing dots

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EPA Method 376.1:
Sulfide by Titrimetry. Official Name: Sulfide (Titrimetric, Iodine)

Summary:
Excess iodine is added to a sample which may or may not have been treated with zinc acetate to produce zinc sulfide. The iodine oxidizes the sulfide to sulfur under acidic conditions. The excess iodine is back-titrated with sodium thiosulfate or phenylarsine oxide.

Scope:
This method determines total and dissolved sulfides in drinking, surface and saline waters; domestic and industrial wastes.

Citation:
Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)

Interferences:
(A) Sulfur compounds: Sulfur compounds such as sulfite, thiosulfate, and hydrosulfite, which decompose in acid may yield erratic results.(B)Volatiles: Volatile iodine-consuming substances can produce high results.(C) Aeration: Aeration can result in loss of sulfide due to volatilization or reaction with oxygen.

QC Requirements:
None.

Maximum Holding Time:
7 days (MCAWW, Table 1).

Media:
WATER

Subcategory:
Inorganic

Concentration:
Greater that 1 mg/L.

Sample Prep:
None.

Precision:
Precision and accuracy data are not available.

Detection:
None.

Revision Number:
Issued 1971; Editorial Revision 1978

Test Description:
Sulfide - Titrimetri

Report Number:
600/4-79-020

Instrument used for this test:
Buret

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Examples:  8260
TO-15

Examples:  Dioxin
Mercury
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