Note: Care must be taken to ensure that the sample holder or prism is non-catalytic to H2O2 lest the oxygen bubbles formed through decomposition interfere with the measurements.
The refractive index for H2O2 is greater than that of water, and the curve relating to composition is slightly concave upward.
Experimental values for refractive index:
| H2O2 Conc.wt.% | ηD | |
|---|---|---|
| 25 °C | 20 °C | |
| 0.00 | 1.33251 | 1.33299 |
| 10.10 | 1.33881 | 1.33946 |
| 19.98 | 1.34521 | 1.34603 |
| 30.11 | 1.35203 | 1.35296 |
| 40.03 | 1.35885 | 1.35986 |
| 50.10 | 1.36611 | 1.36724 |
| 60.66 | 1.37389 | 1.37508 |
| 70.15 | 1.38151 | 1.38284 |
| 79.86 | 1.38927 | 1.39072 |
| 92.36 | 1.39998 | 1.40157 |
| 96.26 | 1.40333 | 1.40495 |
| 99.30 | 1.40607 | 1.40774 |
Ref: P.A. Giguere and P.Geoffrion, Can. J. Res., 27B:168 (1949)
The temperature coefficient for the refractive index is also greater for H2O2 than it is for water: 105 αn = 7.7 + 16.5 ω?
Temperature corrections to be subtracted from the percentage of H2O2 determined above:
| Temp. °C | Approximate Concentration, wt.% | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | |
| 20 | 0.9 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 |
| 21 | 0.8 | 1.9 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.5 |
| 22 | 0.6 | 0.7 | 0.8 | 0.9 | 0.9 | 1 | 1 | 1 | 1.1 | 1.1 |
| 23 | 0.4 | 0.4 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 |
| 24 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 |
Ref: P.A. Giguere and P.Geoffrion, Can. J. Res., 27B:168 (1949)
Constants derived from refractive data:
| H2O2 | H2O | |||
| Specific Refraction | rD | cc/g, 25 °C | 0.1705 | 0.206 |
|---|---|---|---|---|
| Molar Refraction | [R]D | cc/mole, 25 °C | 5.801 | 3.712 |
| Polarizability | α x 1024 | cc/molecule, 25 °C | 2.3 | 1.47 |
| Molar Dispersion | [R]G - [R]c | cc/mole, 20 °C | 1.3576 | 0.929 |
| Dispersion Constant | α x 10-30 | sec-2, 20 °C | 8.479 | 6.532 |
| Characteristic Frequency | ν 0 x 10-15 | sec-1, 20 °C | 2.979 | 2.94 |
Ref: P.A. Giguere, Can. J. Res. 21B:156 (1943)
P.A. Giguere and P.Geoffrion, Can. J. Res., 27B:168 (1949)
请输入账号
请输入密码
请输验证码
以上信息由企业自行提供，信息内容的真实性、准确性和合法性由相关企业负责，仪表网对此不承担任何保证责任。
温馨提示：为规避购买风险，建议您在购买产品前务必确认供应商资质及产品质量。
8
