1.1These test methods cover the determination of the specific gravity of water and brine free of separable oil, as follows:

	Sections
Test Method A-Pycnometer	7 to 11, 21
Test Method B-Balance	12 to 16, 21
Test Method C-Erlenmeyer Flask	17 to 21
Test Method D-Hydrometer	22 to 27

1.2Test Methods A and B are applicable to clear waters or those containing only a moderate amount of particulate matter. Test Method B is preferred for samples of sea water or brines and is more sensitive than Test Method D which has the same general application. Test Method C is intended for samples of water containing mud or sludge.

1.3It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.

1.4The test method was tested at 22°C over a range, shown in Tables 1-4, of 1.0252 through 1.2299; all data were corrected to 15.6°C (60°F).

TABLE 1 Determination of Precision and Bias, Pycnometer Method

Calculated Specific Gravity	Specific Gravity Experimentally Determined	S_T	S_O	% Bias	Statistically Significant (95 % Confidence Level)
1.0247	1.0262	0.00145	0.00023	−0.049	yes
1.0648	1.0665	0.0012	0.00019	+ 0.16	yes
1.1100	1.1119	0.0010	0.00034	+ 0.17	yes
1.2299	1.2235	0.0012	0.00037	−0.52	yes

TABLE 2 Determination of Precision and Bias, Balance Method

Calculated Specific Gravity	Specific Gravity Experimentally Determined	S_T	S_O	% Bias	Statistically Significant (95 % Confidence Level)
1.0247	1.0264	0.0013	0.00022	−0.166	yes
1.0648	1.0657	0.0008	0.00026	+ 0.084	yes
1.1100	1.1126	0.0017	0.00053	+ 0.234	yes
1.2299	1.2233	0.0017	0.00501	−0.539	yes

TABLE 3 Determination of Precision and Bias, Erlenmeyer Method

Calculated Specific Gravity	Specific Gravity Experimentally Determined	S_T	S_O	% Bias	Statistically Significant (95 % Confidence Level)
1.0247	1.026	0.0024	0.00104	+ 0.126	yes
1.0648	1.066	0.0025	0.00164	+ 0.169	yes
1.1100	1.1121	0.0026	0.00119	+ 0.74	no
1.2299	1.2225	0.0018	0.00082	−0.60	yes

TABLE 4 Determination of Precision and Bias, Hydrometer Method

Calculated Specific Gravity	Specific Gravity Experimentally Determined	S_T	S_O	% Bias	Statistically Significant (95 % Confidence Level)
1.0247	1.0256	0.0023	0.00041	+ 0.088	no
1.0648	1.0647	0.0022	0.00060	−0.099	no
1.1100	1.1106	0.0025	0.00078	+ 0.054	no
1.2299	1.2207	0.0064	0.00052	−0.74	yes

1.5The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.6This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.