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Specification Change Notice 170328

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We are pleased to inform that Charslton Technologies PTE LTD  contact information is updated as our distributor in Singapore and Malaysia.

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Takadiastase (Aspergillus oryzae carboxyl proteinase) has been used for hydrolyses of thiamin phosphate ester and riboflavin phosphate ester to analyse thiamin and riboflavin, respectively by HPLC.

However, it is difficult to get commercial Takadiastase stable nowadays.

So in this technical note, we introduce a new sample preparation method for thiamin and riboflavin analyses using acid phosphatase hydrolysis instead of Takadiastase hydrolysis.

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To check aged degradation of insulating oil, degradation product in insulating oil is often measured.   Furfural is one of a degradation product of cellulose composing insulating paper in insulating oil. Furfural is stably dissolved in oil and distinction of degraded state of oil can be confirmed by measuring the concentration of furfural.

 In this technical note, we introduce a HPLC method and two sample preparation methods (liquid-liquid extraction and solid phase extraction with silica gel column) for monitoring furfural in insulating oil.

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Chlorogenic acid is one of phenolic antioxidants in coffee. It has been researched as anticancer compound by many scientists in recent years. Caffeic acid is a degradation product of chlorogenic acid and increase in process of roasting and extraction, etc.

In this technical note, we introduce a rapid HPLC method to measure chlorogenic acid, caffeine, and caffeic acid.

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In 1990, Japanese Ministry of the Environment announced a “Interim Guidance Guidelines on Prevention of Water Contamination by Pesticides for Golf Courses”. Furthermore, the last revision 100929001 announced by the Environment Management Bureau, Ministry of Environment on Sep 29, 2010, states to measure 44 pesticides by LC/MS/MS.

Both quantifier and qualifier ions must be measured besides fenitrothion.

In this technical note, we introduce results of simultaneous analysis of 43 pesticides using 3200 QTRAP® LC/MS/MS System (AB SCIEX) and InertSustain C18 HPLC column.

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Hexamethylenetetramine which was assumed as a precursor compound of formaldehyde is a high polar compound and is difficult to be retained on ODS columns.

In this technical note, we introduce the analysis of Hexamethylenetetramine using 4000 QTRAP® LC/MS/MS System (AB SCIEX) and Inertsil Amide column.

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