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GB 10734-2008: Primary chemical -- Ethylenediamine tetraacetic acid disodium salt
Status: Valid GB 10734: Evolution and historical versions
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Primary chemical -- Ethylenediamine tetraacetic acid disodium salt
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GB 10734-2008
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Primary chemical--Ethylenediaminetetraacetic acide disodium salt
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PDF similar to GB 10734-2008
Basic data | Standard ID | GB 10734-2008 (GB10734-2008) | | Description (Translated English) | Primary chemical -- Ethylenediamine tetraacetic acid disodium salt | | Sector / Industry | National Standard | | Classification of Chinese Standard | G61 | | Classification of International Standard | 71.040.30 | | Word Count Estimation | 18,151 | | Date of Issue | 2008-06-18 | | Date of Implementation | 2009-06-01 | | Older Standard (superseded by this standard) | GB 10734-1989 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the first reference reagent disodium edetate traits, specifications, testing, inspection and marking and packaging rules. This standard applies to the first reference reagent disodium edetate test. | GB 10734-2008: Primary chemical -- Ethylenediamine tetraacetic acid disodium salt---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Primary chemical.Ethylenediamine tetraacetic acid disodium salt
ICS 71.040.30
G61
National Standards of People's Republic of China
Replacing GB 10734-1989
The first reference reagent
Disodium edetate
Posted 2008-06-18
2009-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard Chapter 4 5.3.3,5.3.4.1 are mandatory, other provisions are recommended.
This standard replaces GB 10734-1989 "first reference reagent (capacity) disodium edetate" Compared with GB 10734-1989,
The main changes are as follows.
--- Standard name changed to "first reference reagent disodium edetate";
--- Increasing the normative references (1989 edition Chapter 2, Section 2 of this edition);
--- Modify the description of the determination of the principles of the (1989 version 4.1.1, this version 5.3.1);
--- Modify the constant current coulometric apparatus diagram (1989 version 4.1.3.4, this edition 5.3.2.4);
--- Improve the operation of the pre-titration (1989 version 4.1.4.3, this edition 5.3.3.4);
--- Modify the inspection rules (1989 edition Chapter 5, Chapter 6 of this edition);
--- Canceled Appendix B, Appendix C (1989 edition Appendix B, Appendix C);
--- Increasing the calculation method assay results Uncertainty (edition of Appendix B).
This standard appendix A normative appendix, Appendix B is an informative annex.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the Chemicals Branch of the National Chemical Standardization Technical Committee.
This standard is drafted by. China Institute of Metrology, Beijing Institute of Chemical reagents.
The main drafters of this standard. FEI brother, Wu Bing, Han Baoying, strong Jing Lin.
This standard replaces the standards previously issued as follows.
--- GB 10734-1989.
The first reference reagent
Disodium edetate
Molecular formula. C10H14N2O8Na2 H2O
Structure.
Molecular Weight. 372.2381 (according to 2005 international relative atomic mass).
1 Scope
This standard specifies the first reference reagent disodium edetate traits, specifications, testing, packaging and inspection rules and signs.
This standard applies to the first reference reagent disodium edetate test.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with
GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982,
NEQ)
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 9724 General rule for determination of pH chemical reagent (GB/T 9724-2007, ISO 6353-1. 1982, NEQ)
GB/T 9728 General method for determination of chemical reagents sulfate (GB/T 9728-2007, ISO 6353-1. 1982, NEQ)
GB/T 9729 General method for determination of chloride Chemicals (GB/T 9729-2007, ISO 6353-1. 1982, NEQ)
GB/T 9735 General method for determination of heavy metals Chemicals (GB/T 9735-2008, ISO 6353-1. 1982, NEQ)
GB/T 9738 Chemicals water insoluble determination General method (GB/T 9738-2008, ISO 6353-1. 1982, NEQ)
GB/T 9739 General method for determination of iron chemical reagents (GB/T 9739-2006, ISO 6353-1. 1982, NEQ)
GB 15346 chemical reagent packaging and marking
HG/T 3484 standard chemical reagents glass emulsion and clarity standards
JJG99 weight
JJG116 standard resistor
JJG119-2005 Laboratory pH (acidity) meter
JJG153 standard battery
JJG1006 a standard material specification
3 Characters
This reagent is a white crystalline powder, soluble in water, almost insoluble in ethanol.
4 Specification
Disodium edetate specifications shown in Table 1.
Table 1
Name the first reference
Content (C10H14N2O8Na2 · 2H2O), /% 99.98 ~ 100.02
pH (50g/L, 25 ℃) 4.0 ~ 5.0
Network together passing the test
Clarity test/number ≤3
Water-insoluble, /% ≤0.003
Chloride (Cl), /% ≤0.004
Sulphate (SO4), /% ≤0.01
Nitrilotriacetic acid (C6H9NO6), /% ≤0.05
Iron (Fe), /% ≤0.0005
Copper (Cu), /% ≤0.00025
Heavy metals (Pb), /% ≤0.001
5 Test
5.1 Warning
Reagents used in this test method are toxic or corrosive, some of the testing process can lead to dangerous situations, the operator should take
Appropriate safety and health practices.
5.2 General Provisions
Unless specified otherwise in this chapter, the use of reagent purity should be more analytical, standard solution, preparations and products, according to GB/T 602,
GB/T 603 provisions of preparation, test water should be consistent with GB/T 6682 specifications in two water samples according to precise weighing 0.01g, used
Solution "%" are represented by the mass fraction. High purity nitrogen gas should be used.
5.3 Content
5.3.1 Principle of the method
Coulomb analysis is performed by measuring a quantitative analysis of material from one electrode reaction, or a substance to be analyzed and the electrode reaction
Charge (coulombs) chemical reaction product was quantitatively consumed to quantitative analysis. Coulometry principle is based on the law
Where.
Molar mass M --- material in units of grams per mole (g/mol);
--- Like the number of electron transfer;
F --- Faraday constant ampere seconds per mole of (A · s/mol);
I --- the current solution by electrolysis, in amperes (A);
Constant current precision coulometric titration method is based on a constant current through the electrolytic cell, so that the working electrode electrolysis to produce a titrant with cell
The test substance quantitative reaction, electrochemical method to indicate the end of the reaction, the consumption of electricity by electrolysis calculated according to Faraday's law
The amount of titrant to calculate the content of the test substance.
This method is at a constant current to the amalgamated zinc electrode as an anode, electrolysis divalent zinc ion cell solution to be tested
H2Y2 reaction Determination of edetate disodium.
5.3.2 instruments and devices
5.3.2.1 pH meter. meet JJG119-2005 Chapter 4 "0.001" requirements.
5.3.2.2 Weight. meet JJG99 verification requirements. G group, the annual variation of less than 10μg; mg group, the annual variation of less than 4μg.
5.3.2.3 heated fuel tank. temperature control accuracy of ± 0.01 ℃.
5.3.2.4 Coulomb constant current device diagram (see Figure 1).
1 --- high precision timing constant current source;
2 --- 7½-Meter;
3 --- electrolytic cell;
4 --- end indicator (pH meter);
5 --- dummy load resistor;
6 --- Standard resistance;
7 --- galvanometer;
8 --- temperature standard battery pack;
. 9 --- step switch;
10 --- heated fuel tank.
Figure 1 Schematic diagram of the constant current coulometric
a) high-precision timing constant current source. stability is better than one hundred thousandth of the dynamic characteristics of a good steady flow DC power supply, with 1.0186 ×
1.0186 × 10mA and 100mA two output current, the current value is determined by the compensation method; the minimum timing resolution 0.1ms, current
Timing and synchronization of less than 0.1ms.
b) temperature control standard battery pack. should meet the requirements of JJG153. Range 1V, annual variation of less than 5μV.
c) Standard resistance. should meet the requirements JJG116 of. Relative uncertainty is generally not more than 3 × 10-6.
d) direct radiation galvanometer. resistance < 100Ω, critical external resistance < 1000Ω, dividing the value of < 3 × 10-9A/indexing.
5.3.2.5 end indication circuit (see FIG. 2).
Gold amalgam electrode as indicator electrode, a saturated calomel electrode as the reference electrode, the voltage between the two electrodes is 1.2V.
Figure 2 indicates the end of the circuit
5.3.2.6 electrolytic cell apparatus (see Figure 3).
An anode compartment (left) and a cathode chamber (right) is a diameter of 50mm, 125mm high cylinder 95 made of glass material. With between two chambers
Diameter 20mm, glass horizontal length 80mm connections in the tube melting inside back cover sheet respectively No. 2,2,3 glass sand core, thereby forming two
Have an intermediate chamber manifold with the piston, and the pressure by pumping nitrogen gas pressurization method the electrolyte solution out of the intermediate chamber. Small room two sand core
The distance between the distance 20mm, two large chamber between the sand core is 40mm. The anode chamber mouth tight with a good pre-treated white rubber
Plug 1, respectively inserted through the stopper amalgamated zinc electrodes 2, 3 gold amalgam electrode, a saturated calomel electrode 4, 5 nitrogen inlet, nitrogen outlet pipe 6.
The bottom of the anode compartment has 20mm long was stirred in a sealed Teflon tube about 8 magnet. The cathode compartment a platinum electrode 10, a bottom
Ministry of casting a silicone gel plug 9.
Electrolytic cell unit on magnetic stirrer workbench.
1 --- white rubber stopper;
2 --- zinc amalgam working electrode;
3 --- gold amalgam indicator electrode;
4 --- saturated calomel electrode;
5 --- nitrogen inlet;
6 --- nitrogen outlet pipe;
7 --- sample hole;
8 --- stirring;
--- Silica gel plug. 9;
10 --- platinum electrode;
. 11 --- piston 1;
12 --- piston 2.
3 cell apparatus of FIG.
5.3.3 Determination
5.3.3.1 Preparation of formulations
Amount of sulfuric acid 111mL, 700mL slowly into the water, cooled and diluted to 1000mL.
Weigh 37.22g edetate disodium, is dissolved in water and diluted to 1000mL.
Weigh 53.49g of ammonium chloride, dissolved in water and diluted to 1000mL.
5.3.3.2 Test preparation
5.3.3.2.1 cell cleaning
The new cell before use lotion soak a while, repeatedly washed with water and pumped to wash the sand core colorless, washed several times with water repeatedly pumping.
With ammonium chloride solution (with added disodium edetate about 0.5g) filled with an electrolytic cell, soaked for several days in order to remove the glass from the inner wall of soluble
Child (such as calcium, magnesium, etc.), and then repeatedly washed with water until prior to use alternate.
Good cleaning electrolytic cell can be used repeatedly, simply removing the experiment was repeatedly washed with water to pumping.
5.3.3.2.2 formulated silicone gel plug
Weigh 12.5g of sodium silicate, placed in 150mL beaker, add 50mL water dissolved, add 20mL sulfuric acid solution (2mol/L), were stirred
And uniform boiling, After cooling the solution was poured into the cathode compartment of the electrolytic cell (right side), in the sulfuric acid solution was gradually added slowly with stirring (2mol/L) to dissolve
Become muddy liquid, gel. Formulated silicone gel stuffed add a little sulfuric acid solution (2mol/L) kept moist.
5.3.3.2.3 amalgamated zinc produced a working electrode
On a diameter of about 5mm, 60mm long high-purity zinc bar at one end to make a hole, insert a diameter of about 1mm ~ 1.5mm of copper, zinc bar
End copper and are coated with insulating paint drying at low temperature and set aside.
Before using zinc rod immersed in a solution of hydrochloric acid (1 + 1) in a moment, remove surface contaminants, thoroughly rinsed with water, after immersion in high-purity mercury sheet
Carved to amalgamation. After the manufacture of the electrode, if not should be stored in the ammonium chloride solution, and then the best high purity nitrogen protection. Before use repeatedly use
Wash water.
5.3.3.3 said sample
The sample was placed in a saturated solution of magnesium nitrate (with excess magnesium nitrate crystals) humidistat the humidity for 2 weeks.
Small sample is placed in a polyethylene cup, weighing alternative method to the nearest 0.00001g. The quality of the sample shall be corrected for buoyancy correction
See Appendix A.
5.3.3.4 Pre-titration
Anode chamber was added 4g of ammonium chloride (excellent pure) and 150mL of water, the solution was adjusted to pH 7.0 with sodium hydroxide solution (10g/L),
Stirring from the manifold through the solution into high purity nitrogen to remove dissolved oxygen. Open the piston to the intermediate chamber to introduce about 2mm deep electrolyte solution
Was added a few drops of disodium edetate solution (0.1mol/L). Sulfuric acid solution was added to the cathode chamber (1mol/L) 40mL, and the same
When added 0.3g of potassium hydroxide (excellent pure) adjusting the pH to 7.0, 10.186mA current pre-titration curve for incremental method
(See FIG. 4). After the completion of pre-pressurization and depressurization of the titration method with intermediate washing chamber several times, and the solution was washed with an anode compartment electrolytic cell wall, and finally
The electrolyte solution is returned to the intermediate chamber 2mm. The final current value recorded over the titration part of the amount of charge in the calculation of the total charge
Amount.
5.3.3.5 titration end point and seek
Open the piston, so that the middle chamber filled with electrolyte solution, close the piston, to blow through nitrogen inlet above the surface of the anode chamber is maintained positive
Pressure to prevent entry of air. By loading the sample into the hole (with cups) and 0.5g of potassium hydroxide (excellent pure), and stirred until dissolved sample. Slow
Under stirring 101.86mA current, the electrolysis of zinc ion titration solution H2Y2-, 99.9% of the sample to be titrated, remove power
Source, note the time and calculate the amount of charge consumed. Washed thoroughly with electrolyte solution in the anode chamber and the intermediate chamber wall, and the pH of the solution adjusted
Section 7.0, to the middle of the room to introduce 2mm deep electrolyte solution after use 10.186mA current incremental method the painted end curve.
The intermediate compartment is washed again several times, until the current value became unchanged, indicating the recording current value. The recording of the current directions - the number of electrolysis time
It is drawn endpoint of the titration curve. Typical end curve shown in Figure 4. Fig. A point represents a current value when the electrolysis was stopped, B point represents completion of washing
Two straight portion of the current value of the curve to extend the line of intersection C is the endpoint of the titration.
4 a schematic diagram of the end of the curve
Calculate the amount of charge consumed before it reaches the end of the intermediate chamber and the amount of charge consumed by the diffusion of ions H2Y2- to Figure 4, i.e., A, B
The amount of charge between two points.
5.3.4 Calculation
5.3.4.1 disodium edetate mass fraction calculation
Disodium edetate mass fraction, the value in the "%" means, according to equation (2).
= QPQT ×
100 = I
(2)
Where.
I --- the current solution by electrolysis, in amperes (A);
--- The M value disodium edetate molar mass of the units of grams per mole (g/mol);
--- Like the number of electron transfer;
F --- Faraday constant ampere seconds per mole of (A · s/mol);
E --- standard electromotive force in volts (V);
R --- standard resistor in ohms (Ω).
(2) In the formula.
Where.
I1 --- large current electrolysis current value in units of milliamperes (mA);
I2 --- pre-titration end point and seek current value, in milliamperes (mA);
Uncertainty and assay results of calculation 5.3.4.2
Expanded uncertainty assay results should generally be less than 0.02% (k = 2), the calculation method, see Appendix B.
Determined according to the provisions of GB/T 9724's.
5.5 Test network together
5.5.1 Preparation of test solution and preparation
5.5.1.1 sample solution
Weigh 0.327g sample is dissolved in hot water, cooled and transferred to 100mL volumetric flask, dilute to the mark.
5.5.1.2 sodium carbonate solution
Weigh 0.100g previously dried at 200 ℃ 2h calcium carbonate, placed in 100mL flask, add 10mL water and 0.4mL hydrochloric acid
Solution (20%), was dissolved with aqueous ammonia solution (10%) and diluted to the mark.
5.5.1.3 copper sulphate solution
Weigh 0.250g copper sulfate pentahydrate, placed in 100mL volumetric flask, dissolved in water, dilute to the mark.
5.5.2 Determination
5.00mL amount of the sample solution, add 3 drops of ammonia solution (10%) and 2.5mL ammonium oxalate solution (40g/L), shaking continuously,
Plus 5.00mL sodium carbonate solution, the solution should be transparent. If, after shaking 1min, the solution is still cloudy, plus 0.2mL sample solution, shake
After moving 1min, transparent solution strain.
Amount of sample solution 5.00mL, 0.5mL add ammonia solution (1%) and 0.5mL hexacyanoferrate (Ⅱ) solution of potassium (100g/L),
Constantly shaking plus 4.8mL copper sulfate solution, the solution should be bluish green, not a red.
5.6 Clarity test
Weigh 5g sample was dissolved in 100mL of water. Turbidity is not greater than HG/T 3484 standard stipulated clarity 3.
5.7 Water insoluble matter
Weigh 20g sample was dissolved in 300mL boiling water, measured according to the provisions of GB/T 9738's.
5.8 Chloride
Weigh 0.5g sample was dissolved in 10mL water, add 2mL solution of nitric acid (25%), and shaken until complete precipitation of the precipitation, filtration, water
Washed three times, the combined filtrate and washings were diluted to 20mL, determined according to the provisions of GB/T 9729's. The turbidity of the solution was not greater than the standard ratio
Turbid solution.
Standard preparation turbid solution is to take the ratio of 0.02mg containing chloride (Cl) standard solution was diluted to 20mL, and at the same time with the same volume of test solution
Sample processing.
5.9 sulfate
5.9.1 Preparation of test solution Ⅰ
Weigh 3g sample placed in a platinum dish, slowly heating carbonization burning to white at 600 ℃. If necessary, add 5mL water, evaporated to dryness, and then at
600 ℃ burning, iterative process until the residue completely white. Add water 20mL, 6mL solution of nitric acid solution (25%), evaporated on a water bath. Disabled
Residue dissolved in hot water, cooled, diluted to 30mL (filtered if necessary).
5.9.2 Determination
Amount of test solution 5mL Ⅰ, diluted to 20mL, after adding 0.5mL hydrochloric acid solution (20%) acidification, according to GB/T 9728 regulations
Determination. The turbidity of the solution was not greater than the standard turbidity solution.
Standard preparation turbid solution is to take the ratio of 0.05mg containing sulfate (SO4) standard solution was diluted to 20mL, at the same time with the same volume of test solution
The same treatment.
5.10 nitrilotriacetic acid
5.10.1 Instruments
Pulse or oscilloscope pole spectrometer.
5.10.2 Test conditions
Working electrode. dropping mercury electrode;
Reference electrode. silver - silver chloride or saturated calomel electrode;
Electrode. platinum electrode;
Sensitivity. properly selected;
Way oxygen. nitrogen 5min above;
Scanning potential range. -0.6V ~ -1.1V.
5.10.3 Determination
Weigh 1g sample was added 30mL of hot water to dissolve, cooled, the pH of the solution was adjusted with sodium hydroxide solution (100g/L) to 10.5 to 10.7
(Control with pH meter). Solution of cadmium chloride solution (50g/L) to a solution of trace precipitation [dropping the pH value should be maintained
Between 10.5 to 10.7, if necessary, adjusted with sodium hydroxide solution (100g/L)], was diluted to 50mL with sodium hydroxide solution (0.02g/L).
With a very spectrometer, which polarographic wave height shall not be greater than half of the standard wave height.
Standard is taken containing 0.5mg nitrilotriacetic acid (C6H9NO6) 1g sample and standard solution, add 30mL dissolved in hot water, cooling, and
The same volume of sample solution at the same time the same treatment.
5.11 Iron
5.11.1 Preparation of the test solution Ⅱ
Weigh 3g sample placed in a platinum dish, slowly heating carbonization burning to white at 600 ℃. If necessary, add 5mL water, evaporated to dryness, and then at
600 ℃ burning, iterative process until the residue completely white. Add 10mL of water to dissolve the residue, was added dropwise a solution of hydrochloric acid (20%) and the excess 1mL,
For 10min in a water bath, diluted to 30mL.
5.11.2 Determination
Ⅱ amount of 10mL of the test solution, the solution was adjusted with ammonia solution (10%) to pH 2, was diluted to 15mL, press
The provisions of GB/T 9739 Determination. The red solution should not be deeper than the standard colorimetric solution.
Preparation of the standard developing solution containing 0.005mg is to take the ratio of iron (Fe) standard solution was diluted to 15mL, and at the same time with the same volume of test solution
deal with.
Copper 5.12
The amount of 10mL of the test solution Ⅱ (5.11.1), add 5mL ammonium citrate solution (200g/L), the solution was adjusted with ammonia to pH
9, and the excess 1mL, diluted to 25mL. Add 1mL diethyl dithiocarbamate solution (1g/L), shake, add 5mL isoamyl alcohol
Extraction, shaking 1min, the yellow organic phase can not be deeper than the standard colorimetric solution.
Preparation of standard color solution is to take the ratio of 0.0025mg containing copper (Cu) standard solution was diluted to 10mL, and at the same time with the same volume of test solution
Sample processing.
5.13 Heavy Metal
After the amount of 20mL test solution Ⅰ (5.9.1), the solution was adjusted with ammonia solution (10%) to pH 4, according to GB/T 9735 of Regulation
Fixed determination. The solution was dark can not be deeper than the standard colorimetric solution.
Preparation of the standard developing solution containing 0.02mg ratio is taken of lead (Pb) standard solution was diluted to 25mL, and at the same time with the same volume of test solution
deal with.
6 Inspection rules
For mass-produced products, in accordance with the requirements of uniformity JJG1006 initial inspection.
Bulk product inspection can be carried out by the preliminary dispensing, after extracting a sample formal test.
Official test sample rule. when the total number of units is less than 200, the number of shape extraction unit less than 11; When the whole is greater than the number of units 200
When less than 500, like less than 12; when the total number of more than 500 units, like no less than 15.
7 Packaging and marking
According to GB 15346 requirements for packaging, storage and transportation, and flags are given, including.
Packing unit. Class 3;
Inner packaging. NB-4, NB-5, NB-6;
Packaging forms. The specifications for the 600g/m2 of box board paper box, outer mounted electro-optical blue paper.
Appendix A
(Normative)
Substance was weighed mass air buoyancy correction
ρW
-1
Where.
ρK --- when the density of the air weighing in grams per cubic centimeter (g/cm
3);
ρW --- density of the material to be weighed in grams per cubic centimeter (g/cm
3);
pf --- weights density in grams per cubic centimeter (g/cm
3).
Formula (A.1) in.
Air density (ρK), in grams per cubic centimeter (g/cm
3), according to equation (A.2) Calculated.
ρK = 0.00129
273.15
Where.
P1 --- atmospheric pressure value in units of kilopascals (kPa);
P2 --- vapor pressure of water at room temperature value in units of kilopascals (kPa);
(A.2) in the formula.
The value of water vapor pressure (P2), in units of kilopascals (kPa), according to equation (A.3) Calculated.
P2 = W × P3 (A.3)
Where.
W --- values of relative humidity of air in%;
Numerical P3 --- saturated vapor pressure of water at room temperature, measured in kilopascals (kPa).
Water vapor pressure values are shown in Table A. 1.
Table A. 1 Water vapor pressure (P Rao k)
Temperature (C °) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
11 1.312 1.321 1.329 1.338 1.347 1.356 1.365 1.374 1.383 1.392
12 1.402 1.411 1.420 1.430 1.439 1.448 1.458 1.468 1.477 1.487
13 1.497 1.507 1.516 1.526 1.536 1.546 1.556 1.567 1.577 1.587
14 1.598 1.608 1.618 1.629 1.639 1.650 1.661 1.672 1.682 1.693
15 1.704 1.715 1.726 1.737 1.749 1.760 1.771 1.783 1.794 1.806
16 1.817 1.829 1.840 1.852 1.864 1.876 1.888 1.900 1.912 1.924
33 5.030 5.059 5.087 5.116 5.144 5.173 5.202 5.231 5.290 50261
34 5.320 5.349 5.379 5.409 5.439 5.470 5.500 5.531 5.561 5.592
35 5.623 5.654 5.686 5.717 5.749 5.78...
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