5-Aminolevulinic acid (ALA), the common precursor of all naturally occurring tetrapyrroles, forms a stable condensation product with 2-amino-3-hydroxynaphthafene which can be identified by its fluorescence. Separation of the compound by reversed-phase high-performance liquid chromatography on RPC-18
Hydrazine determination in sludge samples by high-performance liquid chromatography
β Scribed by Gracy Elias; William F. Bauer
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 499 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1615-9306
No coin nor oath required. For personal study only.
β¦ Synopsis
Hydrazine determination in sludge samples by high-performance liquid chromatography
A relatively simple and cost-effective method utilizing HPLC with UV detection was developed to detect and quantify hydrazine in sludge samples. The method was developed primarily for sludge samples, but it can also be applicable to soil and other environmental samples. The hydrazines in the matrices were derivatized to hydrazones with benzaldehyde. The hydrazones were separated using HPLC with an RP C-18 column in an isocratic mode with methanol-water (95:5 v/v) and detected with UV detection at 313 nm. The detection limit (25 lL injection) for the method is 0.02 lg/mL of hydrazine.
π SIMILAR VOLUMES
## Abstract This work suggests an HPLC method for qualitative and quantitative determination of __N__^Ξ΅^(2βaminoβ2βcarboxyethyl)βLβlysine (LAL). LAL was released from total hydrolysates of various proteins of animal origin and derivatized with dansyl chloride. The performance of two different colum
A highly sensitive and specific assay method for cystamine using high-performance liquid chromatography has been developed. The method is based on postcolumn derivatization of cystamine with o-phtalaldehyde in the presence of 2-mercaptoethanol and sodium hypochlorite. The separation of cystamine was
## Abstract Captopril, a wellβknown angiotensin converting enzyme (ACE) inhibitor, is widely used for treatment of arterial hypertension. Recent studies suggest that it may also act as a scavenger of free radicals because of its thiol group. Therefore, the present study describes a rapid, sensitive
The mean values of alpha and beta-carotene of 10 fruits and vegetables from supermarkets in Cairo and Alexandria have been determined using HPLC method, and the average vitamin A activities (in retinol equivalents) calculated. Carrots, spinach and sweet potatoes were the best sources of provitamin A