Springer Science and Business Media LLC
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
The dipole approach in ion-interaction chromatography of zwitterions
Springer Science and Business Media LLC - Tập 54 Số 1 - Trang 38-44 - 2001
The chromatographic behavior of zwitterions in Ion-interaction chromatography (IIC) is, investigated theoretically for the first time. The modification of the stationary phase in the presence of Ion-interaction reagent (IIR), and adsorption competition between test analytes and IIR for inner layer sites are shown theoretically to change the partition coefficient for zwitterions. Experimental resul......
Contribution of adsorption to retention data in glass capillary gas chromatography part. I. Polar stationary phases
Springer Science and Business Media LLC - - 1982
The obstruction factor γ in gas chromatography
Springer Science and Business Media LLC - Tập 14 - Trang 576-578 - 1981
The relationship between the obstructive factor γ and velocity was restudied. The dependence of the obstructive factor on velocity was verified. The effects of diffusion coefficient and particle-to-column diameter ratio on the obstructive factor-velocity relationship were investigated. The results are consistent with Hawkes' hypothesis that values of γ at low velocities are averages over tightly p......
Solvent-generated liquid-liquid chromatography with aqueous ternary systems
Springer Science and Business Media LLC - - 1984
The mass detector: A new detection system for carbohydrate and lipid analyses
Springer Science and Business Media LLC - - 1982
Characterization of the selectivity of stationary phases from the partial molar free energies of solution of standards
Springer Science and Business Media LLC - Tập 10 - Trang 658-660 - 1977
A thermodynamic description is proposed to express the polarity of stationary phases in terms of the partial molar free energies of solution obtained for standards. This expression is an absolute value for any stationary phase and does not need squalane as the phase with “zero polarity”. Equations are given to express the contributions of dispersive interaction and of the sum of inductive, orienta......
Preparative Isolation and Purification of Flavonoids and Protocatechuic Acid from Sea Buckthorn Juice Concentrate (Hippophaë rhamnoides L. ssp. rhamnoides) by High-Speed Counter-Current Chromatography
Springer Science and Business Media LLC - Tập 65 - Trang 1-7 - 2006
High-speed counter-current chromatography (HSCCC)—a support free all liquid–liquid chromatography technique—has been successfully used for the preparative isolation of isorhamnetin 3-O-β-d-glucoside, isorhamnetin 3-O-β-rutinoside, quercetin 3-O-β-d-glucoside, syringetin 3-O-β-d-glucoside and protocatechuic acid from sea buckthorn juice concentrate (Hippophaë rhamnoides L. ssp. rhamnoides, Elaeagna......
Ethylene oxide pollution evaluation part I: Sampling with active charcoal tubes
Springer Science and Business Media LLC - Tập 21 - Trang 201-204 - 1986
Air sampling of ethylene oxide on active charcoal tubes followed by GC analysis is a frequently proposed method. This paper studies just to what extent it can be used, defining its limitations (concentration range, influence of ambient temperature and relative humidity), which are seldom taken seriously into account. This method proves inadequate to determine low pollution levels, i.e. around 2 mg......
Tổng số: 8,669
- 1
- 2
- 3
- 4
- 5
- 6
- 10