A Quick Method for the Determination of Arsenious Oxide in Paris Green and Other Insecticides.

1909 ◽  
Vol 1 (3) ◽  
pp. 208-209
Author(s):  
C. Hedges
Keyword(s):  
Quick Method

A quick method for determination of psychoactive agents in serum and hair by using capillary electrophoresis and mass spectrometry

2015 ◽  
Vol 111 ◽  
pp. 177-185 ◽  
Author(s):  
Aneta Woźniakiewicz ◽  
Renata Wietecha-Posłuszny ◽  
Michał Woźniakiewicz ◽  
Ewelina Bryczek ◽  
Paweł Kościelniak
Keyword(s):  
Mass Spectrometry ◽  
Capillary Electrophoresis ◽  
Quick Method

Determination of /V-Nitrosodipropylamine in Trifluralin Emulsifiable Concentrates Using Minicolumn Cleanup and Gas Chromatography with Thermal Energy Analyzer

1988 ◽  
Vol 71 (2) ◽  
pp. 333-336
Author(s):  
Dave Wotherspoon ◽  
Ralph Hindle
Keyword(s):  
Gas Chromatography ◽  
Thermal Energy ◽  
Internal Standard ◽  
Energy Analyzer ◽  
Quick Method ◽  
Coefficients Of Variation ◽  
Significant Difference ◽  
Artifact Formation ◽  
And Control

Abstract A quick method for determining /V-nitrosodipropylamine (NDPA) levels in trifluralin emulsifiable concentrate formulations is described. At least 18 samples can be analyzed at one time in a minimum of fumehood space, with up to 90% savings on solvents and materials. A sample aliquot is mixed with a solution containing nitrosamine recovery standards, and nitrosamines are separated by minicolumn cleanup. Internal standard is added directly to the eluate containing the nitrosamines, and levels are determined by gas chromatography with thermal energy analyzer. Recoveries of spiked nitrosamines ranged from 98 to 102%. Coefficients of variation for samples containing 0.5 ppm NDPA are 13%. Minimum detectable limit, calculated as 3 times the noise, is 0.06 ppm. Comparison with the method formerly used by this laboratory shows no significant difference in the analytical results at 95% confidence limits, and control experiments were performed to ensure that there was no artifact formation of NDPA.

A Simple and Quick Method for Determination of Oxygen Debt Contracted During Physical Effort

Ergonomics ◽  
1974 ◽  
Vol 17 (2) ◽  
pp. 249-257 ◽  
Author(s):  
J. SEN GUPTA ◽  
G. P. DIMRI ◽  
N. T. JOSEPH ◽  
N. C. MAJUMDAR ◽  
M. S. MALHOTRA
Keyword(s):  
Oxygen Debt ◽  
Quick Method ◽  
Physical Effort

A quick method for the determination of the Al/Si weight ratio in alumino-silicates using an Am-Be neutron source

2004 ◽  
Vol 262 (2) ◽  
pp. 501-504 ◽  
Author(s):  
S. A. Jonah ◽  
M. O. A. Oladipo ◽  
I. M. Umar ◽  
N. Rabiu ◽  
Y. U. Idris ◽  
...  
Keyword(s):  
Neutron Source ◽  
Weight Ratio ◽  
Quick Method

Measurement of secretion in nasal lavage

1987 ◽  
Vol 73 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Hans Bisgaard ◽  
Ole W. Krogsgaard ◽  
Niels Mygind
Keyword(s):  
Quantitative Measure ◽  
Lavage Fluid ◽  
Nasal Secretion ◽  
Nasal Lavage ◽  
Quick Method ◽  
Accuracy Of Measurements ◽  
Nasal Secretions ◽  
Repeated Use ◽  
Nasal Lavage Fluid

1. The amount of admixture in nasal lavage fluids was determined by addition of 99mTc labelled albumin, providing a correction factor for measurements of cellular material and humoral substances in nasal lavage return as well as a quantitative measure of nasal secretions. 2. Albumin was chosen as marker molecule, since only negligible amounts were absorbed or adsorbed to the mucosa during the nasal lavage. 3. Labelling of the albumin with 99mTc ensured an accuracy of measurements only limited by the precision of the weighing. The isotope allowed for the determination of the amount of admixed secretion to be carried out on the whole sample of lavage fluid, thereby avoiding the necessity of complete admixture between marker and lavage fluid which would be pertinent to marker molecules measured chemically. The radiation from a nasal lavage is minimal and the procedure is fully acceptable for repeated use in humans. 4. The nasal lavage technique adopted allowed the return of 99.2% (median value) of the instilled volume. The area irrigated was visualized on a gamma-camera, and was demonstrated to cover an area larger than the area reached by challenge from a pumpspray, i.e. a large part of the nose, yet not the oropharynx. 5. A dose related increase in nasal secretion harvested by the nasal lavage in 10 persons challenged with histamine chloride could be demonstrated by this technique. 6. It is concluded that the use of 99mTc-albumin in a nasal washing provides a safe, simple and quick method for determination of the admixed nasal secretion with a remarkable degree of accuracy. The method is therefore suggested to improve determinations of admixture in nasal lavage fluid.

Detection of Adulterated Vegetable Oils Containing Waste Cooking Oils Based on the Contents and Ratios of Cholesterol, β-Sitosterol, and Campesterol by Gas Chromatography/Mass Spectrometry

2015 ◽  
Vol 98 (6) ◽  
pp. 1645-1654 ◽  
Author(s):  
Haixiang Zhao ◽  
Yongli Wang ◽  
Xiuli Xu ◽  
Heling Ren ◽  
Li Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Vegetable Oils ◽  
Waste Cooking Oil ◽  
Gas Chromatography Mass Spectrometry ◽  
Quick Method ◽  
Cooking Oil ◽  
Waste Cooking Oils ◽  
Cooking Oils

Abstract A simple and accurate authentication method for the detection of adulterated vegetable oils that contain waste cooking oil (WCO) was developed. This method is based on the determination of cholesterol, β-sitosterol, and campesterol in vegetable oils and WCO by GC/MS without any derivatization. A total of 148 samples involving 12 types of vegetable oil and WCO were analyzed. According to the results, the contents and ratios of cholesterol, β-sitosterol, and campesterol were found to be criteria for detecting vegetable oils adulterated with WCO. This method could accurately detect adulterated vegetable oils containing 5% refined WCO. The developed method has been successfully applied to multilaboratory analysis of 81 oil samples. Seventy-five samples were analyzed correctly, and only six adulterated samples could not be detected. This method could not yet be used for detection of vegetable oils adulterated with WCO that are used for frying non-animal foods. It provides a quick method for detecting adulterated edible vegetable oils containing WCO.

Quick method (FT-NIR) for the determination of oil and major fatty acids content in whole achenes of milk thistle (Silybum marianum(L.) Gaertn.)

2014 ◽  
Vol 95 (11) ◽  
pp. 2264-2270 ◽  
Author(s):  
Pavla Koláčková ◽  
Gabriela Růžičková ◽  
Tomáš Gregor ◽  
Eliška Šišperová
Keyword(s):  
Fatty Acids ◽  
Milk Thistle ◽  
Silybum Marianum ◽  
Quick Method

scholarly journals Determination of 14C in Alcoholic Beverages

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 777-784 ◽  
Author(s):  
Franz Schönhofer
Keyword(s):  
Lower Limit ◽  
Liquid Scintillation ◽  
Limit Of Detection ◽  
Scintillation Counter ◽  
Age Determination ◽  
Alcoholic Beverages ◽  
Quick Method ◽  
Low Level ◽  
Factors Influencing

A simple and quick method for the determination of 14C in ethanol has been developed, using an ultra low-level liquid scintillation counter. I have studied factors influencing the lower limit of detection and have shown that liquor can be measured directly without pretreatment. Results of measurements on Austrian wines are presented and compared with results obtained from tritium measurements. The applicability and limitations of the results to age determination are discussed.

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