Determination of Pd, Cd, Cr, Cu, Sb in Synthetic Leather
ZHAO, Yang
(China Leather and Footwear Industry Research Institute, Beijing 100015, China)
Abstract：An effective method for the determination of heavy metals in Synthetic Leather by
ICP-OES with microwave digestion was developed in this paper. Samples of Synthetic Leather
were digested with high throughput microwave chemistry workstation in nitric acid, hydrogen
peroxide and fluorhydric acid mixed system, the boric acid is used to eliminate the effect of
fluorhydric acid and quantified by ICP-OES. The result shows that the limit of detection was
0.0019～0.043μg/mL, the average recoveries at three levels ranged form 88.5%～102.8%, the
relative standard deviations were lower than 6.3% after microwave digestion and ICP-OES
analytical condition were optimized. The method has the advantage of simplicity, high sensitivity,
wide range of linear and small distraction. The determined results are accurate and the
reproducibility is good. It has been applied to routine determination of heavy metals in synthetic
leather with satisfactory results.
Key words: synthetic leather; heavy metals; microwave digestion; ICP-OES
Determination of Heavy Metals in Leather Protein Hydrolyzate by ICP-OES
with Microwave Digestion
ZHAO Yang*，QI Xiao-xia
(China Leather and Footwear Industry Research Institute, Beijing 100016, China)
Abstract ： An effective method for the determination of heavy metals in leather protein
hydrolyzate by ICP-OES with microwave digestion was developed in this paper. Samples of
leather protein hydrolyzate were digested with high throughput microwave chemistry workstation
in nitric acid and hydrogen peroxide mixed system and quantified by ICP-OES. The result shows
that the limit of detection was 0.009～0.341mg/kg, the average recoveries of heavy metals in
leather protein hydrolyzate at three levels ranged form88.8%～99.4%, the relative standard
deviations were lower than 6.5% after microwave digestion and ICP-OES analytical condition
were optimized. The method has the advantage of simplicity, high sensitivity, wide range of linear
and small distraction. The determined results are accurate and the reproducibility is good. It has
been applied to routine determination of heavy metals in leather protein hydrolyzate with
satisfactory results．
Key words：microwave digestion; ICP-OES; heavy metal; leather; protein hydrolyzate
To Detect CODcr in Waste Water with Microwave Digestion-AEP Titrimeter
Ye Shucai，Chen Zhihong
(Zhongshan Environmental Monitoring Station, Zhongshan)
Abstract: To detect CODcr in waste water with microwave digestion-AEP titrimeter . To digest water sample
using H2SO4-K2Cr2O7-KAl(SO4)2-(NH4)6Mo7O24 first , the best digestion condition was get . Carries on the
opposite experiment through the microwave resolution and the traditional backflow resolution, not only discovers
the former to be able to be complete the sample resolution, saves the massive time compared to the latter, raises the
analysis speed greatly. The automatic electrometric titration and the manual titrate compare, can obtain better picks
out limits, the accuracy, the accuracy and the returns-ratio
Keywords:
microwave resolution ; automatic electric potential titrimeter ; chemical oxygen demand
Determination of Trace Arsenic in Sewage Water by Hydride
Generation—Atomic Fluorescence Spectrometry Digested with Microwave
Yao Guo，Wang Jian wei
（Dongguan Sewage Treatment Plant，Dongguan Guangdong，523080）
Abstract ： Object ： The determination of trace arsenic in sewage water by hydride
generation—atomic fluorescence spectrometry digested with microwave was studied. Method:
the sewage samples were digested by nitric acid— perchloric acid. After adding thiourea—
ascorbic acid into the medium of hydrochloric and potass borohydride —sodium hydroxide as the
reducing agent. the sewage waters were determinate by hydride generation—atomic fluorescence
spectrometry .Result: The detection limit of the method was less than 0.02μg/Land RSD was
0.14%.The recovery rates of the method was 92%～108%.Conclusion：The determination way is
simple and the result is correct and good repetition.
Key words: microwave digestion，hydride generation，atomic fluorescence，sewage water，arsenic
Application of Microwave Digestion Technology in Environmental Monitoring
Yin Wei1 Liu Changkuan2
(1Beijing Chemical Engineering Research Institute, Beijing 100022 )
(2China Analytical Instrument Branch, Beijing 100081 )
Abstract: Application of microwave digestion technology in the analytical chemistry has brought
analytical laboratories a new revolution. The transfer methods of microwave energy are more
efficient and cleaner than the traditional heating methods. So microwave digestion technology is
widely used soon. This paper summarized how microwave digestion used in environmental
monitoring field, including measuring heavy metals in the soil, solid waste, sediment and COD in
the wastewater. Now microwave digestion technology has been widely used in many
environmental monitoring laboratories.
Key Words: Microwave, Digestion, Environmental monitoring