Highly sensitive and selective spectrofluorimetric approach for the rapid determination of trace benzo[α]pyrene in drinking water and in solutions leached from disposable paper cups

Luminescence ◽  
2011 ◽  
Vol 26 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Na Zhou ◽  
He-Dong Luo ◽  
Na Li ◽  
Yu-zhu Jia ◽  
Yao-Qun Li
Keyword(s):  
Drinking Water ◽  
Rapid Determination ◽  
Highly Sensitive ◽  
Paper Cups

A Fluorometric Ferric Chloride Method for Determining Cholesterol in Cerebrospinal Fluid and Serum

1970 ◽  
Vol 16 (6) ◽  
pp. 472-476 ◽  
Author(s):  
Elizabeth B Solow ◽  
L W Freeman
Keyword(s):  
Cerebrospinal Fluid ◽  
Ferric Chloride ◽  
Rapid Determination ◽  
Biological Fluids ◽  
The Past ◽  
Highly Sensitive ◽  
Chloride Method ◽  
Cholesterol Measurement

Abstract Sensitive or simple methods for the rapid determination of cholesterol in biological fluids have been developed during the past 10 years. Sensitivity has been increased by fluorimetry of the Lieberman—Burchard reaction for cholesterol. Measurement of the reaction of cholesterol with ferric chloride is simpler. Still, there are great differences between the results when different methods are used to measure the microquantities of cholesterol present in small volumes of serum or cerebrospinal fluid. In the proposed method, the simpler ferric chloride technique has been made highly sensitive by use of fluorometry. As little as 100 µl of cerebrospinal fluid, containing less than 1 µg of cholesterol, may be used, and the reaction is stable for as long as 1 h. Interference was negligible from pigments (such as bilirubin and hemoglobin), certain drugs, and ionic substances that might be expected to affect fluorescence.

Highly-sensitive and rapid determination of sunset yellow using functionalized montmorillonite-modified electrode

2015 ◽  
Vol 173 ◽  
pp. 640-644 ◽  
Author(s):  
Yiyan Songyang ◽  
Xiaoqing Yang ◽  
Shunlan Xie ◽  
Haohua Hao ◽  
Jinchun Song
Keyword(s):  
Modified Electrode ◽  
Rapid Determination ◽  
Sunset Yellow ◽  
Highly Sensitive

A QCM Immunosensor for Rapid Determination of Ractopamine in Food Based on Enzyme-AuNPs for Signal Amplification and Magnetic β-Cyclodextrins for Extraction

2015 ◽  
Vol 738-739 ◽  
pp. 56-60
Author(s):  
Shu Xian Chen ◽  
Jing Liu ◽  
Dao Dong Pan ◽  
Ning Gan
Keyword(s):  
Signal Amplification ◽  
Rapid Determination ◽  
Screening Method ◽  
High Sensitivity ◽  
The Novel ◽  
Highly Sensitive ◽  
Reliable Quantification ◽  
Highly Sensitive Detection ◽  
Amplification Strategy

An enzyme amplified immunosensor for highly sensitive detection of Ractopamine (RAC) in foodstuff was developed based on quartz crystal microbalance (QCM). The high sensitivity was achieved by enzyme-AuNPs signal amplification strategy and magnetic β-cyclodextrins (β-CD) enrichment capacity. The novel QCM immunosensor which combines with the advantages of high selectivity of immunoassays and the high sensitivity of QCM has been developed for the determination of trace residues of RAC in food production. Under optimum conditions, the differences in the frequencies (∆f) of the QCM were proportional to the concentration of RAC over the range from 0.01 to 10 ng mL-1. The minimal detection limit was 0.01 ng mL-1. Due to its high sensitivity, acceptable stability and good selectivity, the immunosensor realized reliable quantification of RAC in real foodstuff. The proposed project has the potential to become a successful on-site screening method in food safety.

Development of a Highly Sensitive Chemiluminescence Enzyme Immunoassay for the Determination of Bisphenol A

2013 ◽  
Vol 726-731 ◽  
pp. 1283-1286
Author(s):  
Li Rui Liu ◽  
Li Qin Liu ◽  
Xue Qing Chen ◽  
Guo Qing Shi
Keyword(s):  
Detection Limit ◽  
Bisphenol A ◽  
Enzyme Immunoassay ◽  
Rapid Determination ◽  
Secondary Antibody ◽  
Average Recovery ◽  
Highly Sensitive ◽  
Optimized Conditions ◽  
Chemiluminescence Enzyme Immunoassay

A highly sensitive chemiluminescence enzyme immunoassay (CLEIA) method for the determination of bisphenol A (BPA) was developed, which used a secondary antibody labeled with horseradish peroxidase detected with a luminol-based substrate. Under the optimized conditions, the linear range was 0.01μg/mL~0.74μg/mL, and the detection limit was 0.008μg/mL. The average recovery for BPA in barreled water was 104%. This developed method could be applied for the selective, high-throughput, and rapid determination of BPA in barreled water.

scholarly journals Rapid determination of iodine content in drinking water by isopropyl sensitization and inductively coupled plasma mass spectrometry (ICP-MS)

2021 ◽  
Vol 245 ◽  
pp. 03004
Author(s):  
Yanxia Zeng ◽  
Xiashi Zhu
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Inductively Coupled Plasma ◽  
Rapid Determination ◽  
Internal Standard ◽  
Iodine Content ◽  
Ammonia Solution ◽  
Standard Curve ◽  
Icp Ms

A subject for the rapid determination of iodine content in drinking water by isopropyl sensitization and ICP-MS was established. The samples were dissolved in 1% ammonia solution, 127I was selected as the mass number to be measured and 159Tb as an internal standard. At the same time, 4% (V/V) isopropanol was used to enhance aerosol gasification efficiency, 2% NH3·H2O was used to effectively eliminate memory effects of iodine by cleaning sample for 180 seconds. The results show that, the detection limits of iodine in this method are 0.007 mg·kg-1 and it is superior to other literature. The standard curve has a good linear relationship and the recovery rates of testing rusults range are from 96.00% to 112.3%. The content of iodine in standard substance water samples was determined by ICP-MS method. The iodine content in water samples from seven drinking water sources in Lianyungang area was analyzed between 14~21 μg·L-1. It was in line with the allowable value of 10~300 μg·L-1 of the sanitary standard for drinking water, suggesting that the iodine content of drinking water resources in Lianyungang area was in a safe range.

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