Easy Acid Determinations in Wine

Easy Acid Determinations in Wine

Food

Easy Acid determinations in wine; works with colored samples!

Available from JM Science Inc
Total Acid and Amino Acid Determination in Beverages Like Sake

Total Acid and Amino Acid Determination in Beverages Like Sake

Food

Easy and accurate determination of total acidity and total amino acid content in beverages like Sake

Determining Acidity in Fruit Beverages

Determining Acidity in Fruit Beverages

Food

Accurate and Automatic Determination of Acidity in Fruit Beverages Like Orange Juice

Acid and Salt Determination in Colored Samples Like Plum Sauce

Acid and Salt Determination in Colored Samples Like Plum Sauce

Food

Accurate and automatic Determination of Acid and Salt with Colored Samples Like Plum Sauce

Salt Determination in Difficult Samples Like Soy Sauce

Salt Determination in Difficult Samples Like Soy Sauce

Food

Salt Determination Without the use of toxic Potassium Chromate

Acid and Salt Determination in Colored Samples Like Ketchup

Acid and Salt Determination in Colored Samples Like Ketchup

Food

Continuous Analysis for Acid and Salt in colored samples like ketchup

Peroxide Measurement in Edible Oils

Peroxide Measurement in Edible Oils

Food

Simple, reliable and easy measurement of peroxide in fats and cooking oils with a potentiometric titrator

Iodine value measurement for cooking oil | Autotitrator - JM Science

Iodine value measurement for cooking oil | Autotitrator

Food
Fatty acid in cooking oil, for example, oleic acid and linoleic acid absorb one or two of iodine molecules. Other kinds of cooking oils also absorb specific amount of iodine.
Iodine value means the “g” value of halogen which adhere to 100 g of sample; it is defined as indicators for unsaturated bond components of oils and fat in Pharmacopoeias: JP, USP, and EP.
There are two kinds of measuring methods such as Hanus method and Wijs method for Iodine value measurement. The former uses iodine bromide and the latter uses iodine chloride as halogen. In this chapter, the measurement example using more popular Wijs method is introduced.
Acid value of cooking oil | Autotitrator - JM Science

Acid value of cooking oil | Autotitrator

Food
Acid value of oils and fats is defined as “amount (mg) of potassium hydroxide required to neutralize fatty acid in 1 g of sample” (Formula (1)).
R-COOH + KOH → R-COOK + H₂O ・・・(1)
It is used for evaluation of free fatty acid content as quality index of oils and fats. This method is described in a variety of official standards such as “Japan Agricultural Standards” and Pharmacopoeias. Example of titration for acid value in cooking oil is introduced here.
Reference
1) Japanese Pharmacopoeia Seventeenth Edition
Continuous measurement of citric acid and vitamin C in soft drink | Autotitrator - JM Science

Continuous measurement of citric acid and vitamin C in soft drink | Autotitrator

Food
Example of sequential titration for vitamin C and citric acid in a soft drink is introduced here.
(1) Firstly, perform neutralization titration for citric acid with sodium hydroxide standard solution.
(2) After the titration, add acetic acid to adjust to acidic pH. Perform redox titration for vitamin C (ascorbic acid) by iodine standard solution.
 The sequential titration of citric acid and vitamin C will be possible by additional option (buret and simplified dispenser).
Salt Content in Soy Sauce | Autotitrator - JM Science

Salt Content in Soy Sauce | Autotitrator

Food
The determination method of salt content in soy sauce is described as “Measurement of Salt Content” in JAS (Japanese Agriculture Standard). Potentiometric titration and Mohr method is defined in JAS as determination method of salt content, potentiometric titration is more common method because of its ease and high precision. The sample is acidified by nitric acid and the concentration of salt is determined byprecipitation titration with silver nitrate titrant using the silver electrode.
NaCl + AgNO₃ → AgCl + NaNO₃
Successive measurement of acid and salt in dressing | Autotitrator - JM Science

Successive measurement of acid and salt in dressing | Autotitrator

Food
An example of successive determination of concentration of acid and salt chloride in dressing is introduced here. Acid and salt are determined as acid and sodium chloride.
At first, titration of acetic acid with sodium hydroxide titrant is performed. Next, the sample solution is acidified by adding nitric acid, then titration of sodium chloride is performed with silver nitrate titrant.
* The titration for sodium chloride with silver nitrate has to be performed under acidic condition using nitric acid.