共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
CaO solubility in equimolar molten salts CaCl2–x (x = 0, NaCl, KCl, SrCl2, BaCl2 and LiCl) was determined at 873–1223 K and activity coefficient calculated. CaO solubility in the binary salts is less than in CaCl2, and the activity coefficient is greater than one. With increasing temperature CaO solubility increases and the activity coefficient decreases. The dependency of CaO activity coefficient on temperature in equimolar molten salts CaCl2–x is
相似文献
CaCl2 | RTln γCaO = 6961 + 5.06 T (K) | 1123–1223 K |
CaCl2–NaCl | RTln γCaO = 3985 + 17.67 T (K) | 923–1123 K |
CaCl2–KCl | RTln γCaO = 2384 + 22.72 T (K) | 1073–1223 K |
CaCl2–SrCl2 | RTln γCaO = 27245–1.13 T (K) | 1073–1223 K |
CaCl2–BaCl2 | RTln γCaO = 17068 + 10.19 T (K) | 1223–1273 K |
CaCl2–LiCl | RTln γCaO = 14724 + 0.72 T (K) | 923–1073 K |
Full-size table
12.
Cobalt ions in aqueous thiocyanate solution react with Aliquat-336-xylene solution to form anion-association complex which is easily extracted into the organic phase. A typical extraction procedure involves extracting a solution which is 10 ppm in cobalt and 0.06 M,
Strippant | Cobalt stripped (%) | ||||
Na2S (M) 1.0 | 18.3 | ||||
2.0 | 10.7 | ||||
Na2SO3 (M) 0.1 | 10.7 | ||||
0.5 | 49.6 | ||||
1.0 | 52.9 | ||||
EDA (%) 2.5 | 76.6 | ||||
NaOH (M) 0.1 | 4.1 | ||||
0.5 | 74.1 | ||||
1.0 | 90.8 | ||||
2.0 | 76.8 | ||||
NH4OH (M) 0.1 | 24.1 | ||||
0.5 | 91.8 | ||||
1.0 | 97.5 | ||||
2.0 | 99.9 | ||||
EDTA (M) 0.02 | >99.9 | ||||
0.05 | >99.9 | ||||
0.1 | >99.9 | ||||
EDTA (%) 0.1 | >99.9 | ||||
0.5 | >99.9 | ||||
1.0 | >99.9 |
Taken (μg) | Found (μg)a | Standard deviation (μg) |
751 | 748 | 12 |
1501 | 1485 | 15 |
2252 | 2192 | 7 |
- a
- The values are the average of seven determinations, from which the standard deviation value was calculated.
14.
A potentiometric method is described for the determination of thiosemicarbazones involving the formation of a complex with Ag(I). This method is proposed for thiosemicarbazones of the following carbonyl compounds: salicylaldehyde, p-hydroxybenzaldehyde, benzaldehyde, picolinaldehyde, 6-methylpicolinaldehyde and p-dimethylaminebenzaldehyde. Stability constants of the complexes are determined by Ringbom and Harju's method. FIG. 2. Variation of pAg + logαPAT (H) + log ([Ag?PAT)]/[PAT])
Thiosemicarbazone | Log | ||||
-Benzaldehyde | 15.5 ± 0.1 | ||||
-Picolinaldehyde | 14.0 ± 0. | ||||
-6-Methylpicolinaldehyde | 14.5 ± 0. | ||||
-Salicylaldehyde | 15.7 ± 0.1 | ||||
-p-Hydroxybenzaldehyde | 15.6 ± 0. | ||||
-p-Dimethylaminebenzaldehyde | 17.2 ± 0.1 |
Hydrochloric acid | 4 — 8M | ||||
Lead | 0 — 0.03M | ||||
Antimony | 0 — 0.002M |
Cell type | Applications | ||||
Human polymorphonuclear leukocytes | (1) Detection of bactericidal defects, particularly chronic granulomatous disease | ||||
(2) Detection of host opsonic defects (both immunoglobulin and complement ?C3b opsonic defects). | |||||
(3) Analysis of drug effects on host cellular and opsonic defenses (9,11). | |||||
(4) Characterization of bacteria or other particulate matter in terms of ability to generate opsonic activity and/or be ingested by phagocytic cells (3,7). | |||||
Alveolar macrophages | (1) Detection of environmental pollutant effects on respiratory defense mechanisms (against both particulate and soluble matter). | ||||
(2) Analysis of drug effects on respiratory defense mechanisms, particularly drugs administered in the treatment of respiratory diseases. |
Sample | Determinations | Mean (μg) | SD (μg) | ||
Whole blood | 10 | 1004 | 21 | ||
Blood plasma | 10 | 543 | 4 | ||
TCA extracts | 10 | 24 | 2 | ||
Urine (totals) | 10 | 598 | 31 | ||
Urine (inorganic S) | 10 | 374.4 | 19 |
Method | ΔF (Kcal/mole) | ||||
Mukherji and Dey (4) | 4.11 | ?5.70 | |||
Subhrana and Raghavrao (6) | 4.80 | ?6.66 |
Time (min) | 0 | 5 | 10 | 30 | 60 |
Consumption of Mn(III) (mol/mol) | 2.00 | 1.99 | 2.00 | 2.01 | 2.00 |
SO2 (ppm) | ?HgCl2a | ?HgBr2 | ?Hg(Ac)2b | ?Hg(SCN)2 |
2.0 | 12,500 | 10,000 | 10,000 | 9,200 |
4.0 | 12,500 | 11,500 | 10,000 | 9,000 |
6.0 | 12,500 | 11,500 | 10,000 | 9,200 |
8.0 | 12,000 | 11,000 | 10,500 | 9,800 |
- a
- Molar absorptivity based on sulfite ion at 230 nm. Solution was 6.86 buffer.
- b
- Mercuric acetate solutions seemed to be somewhat unstable. absorptivity of about 25,000. The absorbance is linear over a range of approximately 0.5–5.0 ppm as SO2. Covalent mercury(II) compounds form a complex with sulfite, Hg(SO3)22?, which absorbs at 230 nm and shows a linear response over a range of 1–8 ppm as SO2.
设为首页 | 免责声明 | 关于勤云 | 加入收藏 |
Copyright©北京勤云科技发展有限公司 京ICP备09084417号 |