Norm

ASTM D1429-13

Standard Test Methods for Specific Gravity of Water and Brine

54,27

Over deze norm

Status Definitief
Aantal pagina's 6
Commissie D19.05
Gepubliceerd op 01-06-2013
Taal Engels

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).

TABLE 1 Determination of Precision and Bias, Pycnometer Method

Calculated Specific Gravity

Specific Gravity Experimentally Determined

ST

SO

% 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

ST

SO

% 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

ST

SO

% 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

ST

SO

% 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


1.5 The 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.

1.6 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.

Details

ICS-code 13.060.50
Nederlandse titel Standard Test Methods for Specific Gravity of Water and Brine
Engelse titel Standard Test Methods for Specific Gravity of Water and Brine

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