ASTM D515-88
(Test Method)Test Methods for Phosphorus in Water (Withdrawn 1997)
Test Methods for Phosphorus in Water (Withdrawn 1997)
General Information
Standards Content (Sample)
ASTM D515 88 m 0’759530 0038’700 9 m w-26 -6 /
AMERICAN SOCIETY FOR TESTING AND MATERIALS
([Tb Designation: D 515 - 88
1916 Race SI., Philadelphia, Pa. 19103
Reprinted from lhe Annual Book d ASTM Standards, Copyright ASTM
If not listed In lhe currenl combined Index, will appear In lhe next edition.
Standard Test Methods for
Phosphorus in Water’.
This standard is issued under the fixed designation D 515; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of rast reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approvedjôr use by agencies of ihe Department of De/ense. Consult lhe DoD Index of Speci/ications and
Standards /or the specflc year of issue which has been adopted by the Deparlment ojDejense.
specific for the orthophosphate ion. With Test Method A the
1. Scope*
analytical scheme shown in Fig. 1 is used to measure various
1.1 These test methods cover the determination of phos-
forms of phosphorus in the water sample. The separations
phorus in water and wastewater. The following two methods
into various forms are largely analytically defined, but the
are included:
differentiations have been selected for interpretive purposes.
Sections
3.1.1 Separation into dissolved and total recoverable
Method A-Colorimetric Ascorbic Acid Reduction 810 16
forms depends on filtration of the water sample through a
I7 to 25
Method B-Semiautomated Digcstion/Colorimetric Ascorbic Acid
Reduction 0.45-pm membrane filter. A reproducible, gross separation
of dissolved from particulate forms of phosphorus is made
1.2 This standard may involve hazardous materials, oper-
with the uniform pore size membrane filter, but no claim can
ations, and equipment. This standard does not purport to
be made that separation is complete. The sample should be
of the sa&y problems associated wirh ils use. II is
address all
filtered as soon as possibIe after it is drawn if dissolved forms
the responsibility of the user of this standard to establish
are to be measured, since the ratio of dissolved to particulate
appropriate safety and health practices and determine the
phosphorus may change when analysis is delayed. Total
applicability of regulatory limitations prior to use. For a
recoverable phosphorus includes all phosphorus forms when
specific caution statement, see 19.1.
1.3 Former Test Methods B (Colorimetric Amino Reduc- the unfiltered, shaken sample is heated in the presence of
tion) and C (Colorimetric Molybdovanadophosphate) have sulfuric acid and ammonium persulfate.
been discontinued. Refer to Appendix X1 for historical 3.1.2 Orthophosphate (A)-Only orthophosphate and a
information, negligible amount of hydrolyzable phosphorus is measured
when the test is run on the undigested sample. An insignifi-
2. Referenced Documents
cant fraction of the hydrolyzable phosphorus may be con-
verted to orthophosphate on addition of the acidic reagent
2.1 ASTM Standards:
during the test, particularly if completion of the test is
D 1066 Practice for Sampling Steam’
delayed after the addition of acid,
D 1 129 Definitions of Terms Relating toswate$
3.1.3 Hydrolyzable Phosphoru? + Orthophosphate (B)-
D 1 192 Specification for Equipment for Sampling Water
By boiling the sample in the presence of acid such hydrolyz-
and -Steam2
able phosphorus materials as meta-, pyro-, and tripoly-
D 1193 Specification for Reagent Wate?
phosphates are converted to orthophosphate. The measure-
D 2777 Practice for Determination of Precision and Bias
ment will inchde these forms of phosphorus plus the
of Methods of Committee D-19 on Wate?
orthophosphate present in the unboiled sample and a reac-
D 3370 Practices for Sampling Wate?
tion of a few organic phosphorus forms.
E 60 Practice for Photometric Methods for Chemical
3.1.4 Total Phosphorus (CI-The acid-persulfate diges-
Analysis of Metals3
tion of the sample converts all forms of phosphorus in-
E 275 Practice for Describing and Measuring Performance
cluding organic forms to orthophosphate, and hence mea-
of Ultraviolet, Visible, and Near infrared Spectropho-
sures all forms except possibly certain heavy metallic
tometer~~
phosphates present in sediments.
3. Summary of Test Methods 3.1.5 The following calculations can be made for specific
phosphorus forms:
3.1 Both test methods are based on reactions that are
Organic phosphorus = C - B
Hydrolyzable phosphorus = B - A
’ These testmethods are under the jurisdiction of ASTM Committee D-19 on
Particdate phosphorus = (total recoverable phosphorus) - (total
Water and are the direct responsibility of Subcomm$tee D 19.05 on Inorganic
dissolved phosphorus)
Constituents in Water.
Current edition approved Aug. 19, 1988. Published March 1989. Originally
3.2 Selection of the fest meth
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