Toxic metals in rice pose great risks to human health. Metal bioaccumulation in rice grains is a criterion of breeding. Rice breeding requires a sensitive method to determine metal content in single rice grains to assist the variety selection. In the present study, four toxic metals of arsenic (As), cadmium (Cd), chromium (Cr) and lead (Pb) in a single rice grain were determined by a simple and...

The radioactive tracer technique was applied to investigate the migration of cesium and zinc impurities from bottom antireflective coating (BARC) and photoresist (PR) into underlying substrate. The effects of normal baking temperatures and substrate types were studied. Our results indicated that BARC has higher migration ratios than PR, irrespective of the substrate types and normal baking temp...

Laser microdissection followed by mass spectrometry has been successfully used for amyloid typing. However, sample contamination can interfere with proteomic analysis, and overnight digestion limits the analytical throughput. Moreover, current quantitative analysis methods are based on the spectrum count, which ignores differences in protein length and may lead to misdiagnoses. Here, we develop...

An electrothermal atomic absorption spectrometric procedure for the determination of nickel in active pharmaceutical ingredients was developed. Since the recoveries of nickel by the direct dissolution of samples in diluted nitric acid were low and caused errors in the determination of Ni in pharmaceutical samples, different approaches for sample pre-treatment were examined. It was found that th...

The aim of this study was to synthesize the single walled carbon nanotubes (SWCNTs) and determine their hydrogen storage capacities. SWCNTs were firstly synthesized by chemical vapor deposition (CVD) of acetylene (C2H2) on a magnesium oxide (MgO) powder impregnated with an iron nitrate (Fe(NO3)3·9H2O) solution. The synthesis parameters were selected as: the synthesis temperature of 800°C, the i...

Enzymatic extraction methods were evaluated with classical extraction approaches for the determination of arsenic in food. The extraction efficiency for total arsenic was determined by analysing CRM materials DORM-3 fish protein, NIES 106 rice flour and GBW10015 spinach. These were compared with total arsenic concentration determined using microwave-assisted acid digestion and ICP-MS. The total...

As a sample pretreatment device, microwave digestion instrument is widely used in biochemical laboratories. The temperature parameters of the directly decide accuracy experimental results. At present, there no relevant calibration specification，method or device for system China. Due to special working principle instrument, must be high environment, and ordinary measuring will cause ignition, ex...

Abstract Phosphorus recycling from sewage sludge will be obligatory in Germany 2029. content determination is crucial to assess the prescribed rates. Currently, German law regards sample preparation using aqua regia digestion a microwave or under reflux conditions as well instrumental phosphorus by ICP-OES, ICP-MS, photometric with ammonium molybdate equivalent. However, it questionable whether...

In this article, inductively coupled plasma mass-spectrometry (ICP-MS) and optical-emission spectrometry (ICP-OES) were used for the development of an analytical procedure analysis waste Sm-Co magnets. Experimental parameters related to microwave digestion processes acid concentrations optimized. Microwave was carried out in mixtures HF, HCl, HNO3 H2SO4. The complete dissolution samples occurre...