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A total pretreatment solution for vegetable oil

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preekem 发布于 2年前 (2018-08-16)

As one of major nutritional ingredients, vegetable oil provides not only energy, vitamins but also necessary linoleic acid and linolenic acid for body healthy. Hence, there is rising attention and pressing demands to strength the quality inspection of the oil for the safety concern. The application of microwave digestion is able to avoid the loss of volatile elements such as Hg, As; meanwhile, it’s efficient with good result of parallelism, repeatability and accuracy.

A solution to test iodine in infant milk powder

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preekem 发布于 2年前 (2018-08-16)

Iodine, a kind of common microelement, is usually added in infant milk power at microgram level, but it plays important role in infant growth and development. It impedes the growth of infant with insufficient or redundant dosage, for example it causes mental deficiency with less iodine however, it also causes thyroid problem with excess intake. Hence, there is strict limit for the addition of iodine in milk powder. The China nation standard GB14880-94 regulated that iodine or iodate is allowed for 250-680μg/kg in baby food and 30-150μg in 100g milk or rice powder. Iodine exists in the form of Iodine 127 isotope and it’s detectable with in measurable range of spectrum. However it’s added in iodate form in nourishment and binding with protein or other ingredients. Once the sample decomposes, iodine is very volatile and gets lost. This adds up difficulty of pretreatment of iodine-containing sample.

Pretreatment solution for heavy metal and harmful elements in rice

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preekem 发布于 2年前 (2018-07-16)

However, in late May, 2013, the spot check by Guangdong Food and Drug Administration has just found there were 120 batches of cadmium-out-of-limits rice, which came from 8 cities in Hunan provinces Back to Feb, 2011 Professor Pan reported that early in 2007, he had a survey on rice from the markets of six areas in China, which showed that 10% of 170 rice samples were carrying over limits cadmium. This result paralleled to the study performed by Ministry of Agriculture of China that 10.3% rice exceeded in cadmium content.

A total digestion solution for PM 2.5 sample

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preekem 发布于 3年前 (2018-06-04)

Oct, 2011, the sky was enveloped with dust-haze. The air monitoring data from the US embassy in Beijing indicating that the PM2.5 was over 200, which reached level of “poisonous”, however the index released by municipal environmental authority Beijing showed that the worst polluted area was just the level of “mild”. What made such big difference between US embassy in Beijing and local authority? AQI (concentration of PM2.5, PM10, CO, SO2, O3 and NO2) and API (concentration of PM10, SO2, and NO2), which is more realistic? The conception of PM 2.5 plunged into Chinese people’s eye and became a social focus now days.

Determination of chloramphenicol residues in milk by SPE and HPLC/MS/MS

preekem 发布于 4年前 (2016-09-09)

The work shown here provides a sensitive and rapid HPLC/MS/MS method with automated solid phase extractor (EXTRA) for determination of CAP in milk. The method was proved to be good reproducibility, reliable, the recoveries and the RSDs were both meet the requirements.

Determination of chloramphenicol residues in animal-derived food by SPE and HPLC/MS/MS

preekem 发布于 4年前 (2016-09-09)

The work shown here provides a sensitive and rapid HPLC/MS/MS method with all automated solid phase extra instrument (EXTRA) for determination of chloramphenicol in animal-derived food. Samples.The method was proved to be good reproducibility, reliable, the recoveries and the RSDs were both meet the requirements.

Determination of Seven Synthetic Food Dyes in Beverages by EXTRA and HPLC

preekem 发布于 4年前 (2016-09-08)

The work shown here provides a sensitive and rapid HPLC method with all automated SPE and DAD detection for simultaneous determination of seven synthetic food dyes (carmine, amaranth, Allura red AC,Sunset yellow, Lemon yellow, brilliant blue, indigo blue ) in beverages. This method has strong anti-interference and good sensitivity, the recoveries and the RSDs were both meet the requirements.

Determination of three synthetic food dyes in cooked meat products by EXTRA and HPLC

preekem 发布于 4年前 (2016-09-08)

The work shown here provides a sensitive and rapid HPLC method with on-line SPE and DAD detection for simultaneous determination of three synthetic food dyes (carmine, amaranth, Allura red AC) in cooked meat product. This method has strong anti-interference and good sensitivity, the recoveries and the RSDs were both meet the requirements.

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