scholarly journals Enrichment of Some Heavy Metals With Cloud Point Extraction via 5,7-Diiodo-8-Hydroxyquinoline Ligand and Detection by Ultrasonic Nebulizer- ICP-OES Using Internal Standard Method

2018 ◽  
Vol 39 (6) ◽  
pp. 229-234 ◽  
Author(s):  
Mustafa Sahin Dundar ◽  
Ferhat Kaptan ◽  
Celal Caner ◽  
Huseyin Altundag
Keyword(s):  
Heavy Metals ◽  
Cloud Point ◽  
Standard Method ◽  
Cloud Point Extraction ◽  
Internal Standard ◽  
Internal Standard Method ◽  
Icp Oes ◽  
Ultrasonic Nebulizer

scholarly journals Determination of heavy metals in soil by inductively coupled plasma mass spectrometry (ICP-MS) with internal standard method

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Jingchun Mao ◽  
Xinyue Liu ◽  
Bao Chen ◽  
Famei Luo ◽  
Xudong Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Standard Method ◽  
Inductively Coupled Plasma ◽  
Internal Standard ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Internal Standard Method ◽  
Addition Method ◽  
Inductively Coupled

<p>Soil ,the carrier of agricultural production and important part of the ecological environment, is heavily contaminated with hazards heavy metals. Therefore, it is oblige to research analytical techniques that could efficiently determine the total content of heavy metals in soil. The determination of heavy metals in soil was disturbed by matrix elements or spectral interferences . In this study , this problem was solved by internal standard method . GBW07402、GBW07448、GBW07423、GBW07428、GBW074079 soil sample were chosen to be the Certified Reference Materials, soils was prepared by microwave digestion with mixed acid following analyzed for determination the content（Cr,Cu, Pb,Ba,Ni,Mn ） by Inductively coupled plasma mass spectrometric in 50ug/L internal standard concentration, the method was validated by compared with certified values 、method contrast(standard addition method versus internal standard method scan the same prepared solution ) and recovery check. The results of internal standard method are in excellent agreement with the indicative values and the date obtained from standard addition method, respectively. Recoveries were adequate being in the acceptable range of 90-99% and RSD of &lt;6.7 % for all the elements at three level of 5,20 and 50mg/kg with quantified by standard addition method and internal standard method .Finally, The graphy of quality control(n=100)were obtained to guide internal quality control in laboratory</p>

Determination of alcohols in mixtures by 19F NMR spectroscopy using hexefluoroacetone reagent

1982 ◽  
Vol 47 (7) ◽  
pp. 1973-1978 ◽  
Author(s):  
Jiří Karhan ◽  
Zbyněk Ksandr ◽  
Jiřina Vlková ◽  
Věra Špatná
Keyword(s):  
Standard Deviation ◽  
Nmr Spectroscopy ◽  
Standard Method ◽  
Internal Standard ◽  
Internal Standard Method ◽  
Concentration Region ◽  
Experimental Conditions ◽  
Curve Method ◽  
Sample Preparation Procedure

The determination of alcohols by 19F NMR spectroscopy making use of their reaction with hexafluoroacetone giving rise to hemiacetals was studied on butanols. The calibration curve method and the internal standard method were used and the results were mutually compared. The effects of some experimental conditions, viz. the sample preparation procedure, concentration, spectrometer setting, and electronic integration, were investigated; the conditions, particularly the concentrations, proved to have a statistically significant effect on the results of determination. For the internal standard method, the standard deviation was 0.061 in the concentration region 0.032-0.74 mol l-1. The method was applied to a determination of alcohols in the distillation residue from an oxo synthesis.

Sign in / Sign up

Export Citation Format

Share Document