Analytical & Measureing Instruments
Beer is a popular alcoholic beverage due to its sedative activity, refreshing character and a typical bitter taste. However, beer suffers quality degradation over time during storage resulting in stale flavor and browning. Formaldehyde has been known to improve colloidal stability in beer, which can slow quality degradation. It occurs mainly in two ways in…
Inorganic nitrites are naturally occurring compounds in foods, especially plant foods and vegetables, but they are also used as additives in industrially processed foods such as various meat products as well. Increased use of nitrogen-containing compounds as additives has presented a significant public health hazard because of potential conversion of nitrogen compounds into nitrosamines, which…
Peroxide is a useful indicator in determining the levels of oxidation in fats and oils. Its level of existence is called peroxide value (PV) and is a measure of total amount of peroxide in a substance. It is one of the main reasons behind the rancidity, production of toxins in edible oils. The autoxidation reaction…
The SPF value indicates the level of sunburn protection provided by the sunscreen product. All sunscreens are tested to measure the amount of UV radiation exposure it takes to cause sunburn when using a sunscreen compared to how much UV exposure it takes to cause a sunburn when not using a sunscreen.
This experiment introduces a micro-volume protein quantification solution using the POP UV-Vis Spectrophotometer from K LAB equipped with a Microvolume Cell Holder, enabling the use of as little as 10 μL of protein sample for the Pierce™ 660 nm Protein Assay.
토양 중 6가 크롬(hexavalent chromium, Cr(VI))은 산업 활동과 관련하여 토양으로 유입될 수 있는 성분으로, 토양오염 여부를 판단하고 관리 수준을 평가하는 과정에서 분석 대상 물질로 활용된다. 이에 따라 토양 중 6가 크롬의 정량을 위한 표준화된 분석 방법이 제시되어 있다. 토양오염공정시험기준(ES 07408.1b)에서는 디페닐카르바지드(diphenylcarbazide, DPC) 발색 반응을 이용한 전처리/가시선 분광법을 6가 크롬의 정량 분석 방법으로 제시하고 있으며, 산성…
Beer is one of the most popular alcoholic beverages and has produced a large-scale industry worldwide. Beers have an expansive range of variety which resulted the requirement of quality control to ensure safety, authenticity, and distinct flavours as claimed by different manufacturers. Although sensory evaluation is an age old and essential technique in this regard,…
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