• ASTM D1429-08

ASTM D1429-08

Standard Test Methods for Specific Gravity of Water and Brine

ASTM International, 11/15/2008

Publisher: ASTM

File Format: PDF

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Published:15/11/2008

Pages:7

File Size:1 file , 140 KB

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1.1 These 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

1.2 Test 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.

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

1.4 The 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).

1.5 This 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.

TABLE 1 Determination of Bias, Pycnometer Method

Calculated Specific Gravity Specific Gravity Experimentally Determined ± %Bias Statistically
Significant
(95 % Confidence Level)
1.0247 1.0262 0.049 yes
1.0648 1.0665 + 0.16 yes
1.1100 1.1119 + 0.17 yes
1.2299 1.2235 0.52 yes

TABLE 2 Determination of Bias, Balance Method

Calculated Specific Gravity Specific Gravity Experimentally Determined ± %Bias Statistically
Significant
(95 % Confidence Level)
1.0247 1.0264 0.166 yes
1.0648 1.0657 + 0.084 yes
1.1100 1.1126 + 0.234 yes
1.2299 1.2233 0.539 yes

TABLE 3 Determination of Bias, Erlenmeyer Flask Method

Calculated Specific Gravity Specific Gravity Experimentally Determined ± %Bias Statistically
Significant
(95 % Confidence Level)
1.0247 1.026 + 0.126 yes
1.0648 1.066 + 0.169 yes
1.1100 1.1121 + 0.74 no
1.2299 1.2225 0.60 yes

TABLE 4 Determination of Bias, Hydrometer Method

Calculated Specific Gravity Specific Gravity Experimentally Determined ± %Bias Statistically
Significant
(95 % Confidence Level)
1.0247 1.0256 + 0.088 no
1.0648 1.0647 0.099 no
1.1100 1.1106 + 0.054 no
1.2299 1.2207 0.74 yes

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