跳转到主要内容
首页

Dedicated to discovery

  • 关于 ELGA
    • 关于 ELGA
    • 招贤纳士
    • 活动
  • 支持
    • 实验室规划
  • 联系信息
  • EN
  • DE
  • ES
  • FR
  • IT
  • PT
  • JA
  • EN-US
首页
  • 产品
    • PURELAB
      • PURELAB® Flex
      • PURELAB® Quest
      • PURELAB® Pharma Compliance
      • PURELAB® Chorus 1 Complete
      • PURELAB® Chorus 1
      • PURELAB® Chorus 2
      • PURELAB® Chorus 3
      • PURELAB® Chorus 2 +
    • CENTRA
      • CENTRA® R60/120
      • CENTRA® R200
      • CENTRA® RDS
    • MEDICA
      • MEDICA® 7/15
      • MEDICA® Pro-R & Pro-RE
      • MEDICA® R200
      • MEDICA® EDI 15/30
      • MEDICA® Pro-LPS
      • MEDICA® Pro EDI 60/120
      • MEDICA® BIOX
      • Hubgrade
    • BIOPURE
      • BIOPURE® 300/600
    • PURENERGY 30
    • ELGA 全产品系列
  • 应用
    • 一般实验室用水要求
    • 临床生物化学
    • 免疫化学
    • 分光光度测定法:
    • 原子光谱分析法
    • 微生物分析
    • 气相色谱分析法
    • 液相色谱
      • High Performance Liquid Chromatography
    • 电化学
    • 细胞培养
    • 质谱分析法
    • 遗传学
    • 高效液相色谱 (HPLC)
  • 水纯化技术
    • PureSure
    • 反渗透法
    • 活性碳
    • 电去离子法
    • 离子交换法
    • 紫外线照射法
    • 过滤
  • 水中杂质
    • 微生物和细菌
    • 微粒
    • 无机化合物
    • 有机化合物
    • 溶解气体
  • 知识
    • BROSCHÜREN
    • 博客
    • 案例分析
    • 超纯水
    • 白皮书
  • 如何购买?
  • 联系信息
Home
  • 联系信息
  • 产品
    • PURELAB
      • PURELAB® Flex
      • PURELAB® Quest
      • PURELAB® Pharma Compliance
      • PURELAB® Chorus 1 Complete
      • PURELAB® Chorus 1
      • PURELAB® Chorus 2
      • PURELAB® Chorus 3
      • PURELAB® Chorus 2 +
    • CENTRA
      • CENTRA® R60/120
      • CENTRA® R200
      • CENTRA® RDS
    • MEDICA
      • MEDICA® 7/15
      • MEDICA® Pro-R & Pro-RE
      • MEDICA® R200
      • MEDICA® EDI 15/30
      • MEDICA® Pro-LPS
      • MEDICA® Pro EDI 60/120
      • MEDICA® BIOX
      • Hubgrade
    • BIOPURE
      • BIOPURE® 300/600
    • PURENERGY 30
    • ELGA 全产品系列
  • 应用
    • 一般实验室用水要求
    • 临床生物化学
    • 免疫化学
    • 分光光度测定法:
    • 原子光谱分析法
    • 微生物分析
    • 气相色谱分析法
    • 液相色谱
      • High Performance Liquid Chromatography
    • 电化学
    • 细胞培养
    • 质谱分析法
    • 遗传学
    • 高效液相色谱 (HPLC)
  • 水纯化技术
    • PureSure
    • 反渗透法
    • 活性碳
    • 电去离子法
    • 离子交换法
    • 紫外线照射法
    • 过滤
  • 水中杂质
    • 微生物和细菌
    • 微粒
    • 无机化合物
    • 有机化合物
    • 溶解气体
  • 知识
    • BROSCHÜREN
    • 博客
    • 案例分析
    • 超纯水
    • 白皮书
  • 如何购买?
  • 联系信息
  • 关于 ELGA
    • 关于 ELGA
    • 招贤纳士
    • 活动
  • 支持
    • 实验室规划
  • 联系信息
  • EN
  • DE
  • ES
  • FR
  • IT
  • PT
  • JA
  • EN-US
  • 隐私政策
  • 条款和条件
  • 全球法律合规
  • 专利
  • Trademarks
  • 页面操作员
  • Making the perfect cold brew coffee
Cool Science

Making the perfect cold brew coffee

11 4月 2022
- by Dr Alison Halliday

Making the perfect cold brewA new study shows using different coffee species has a bigger impact on the composition and sensory attributes of cold brews than particle size and water temperature.

Coffee is one of the world’s most popular drinks with around two billion cups consumed every day. Although there are more than 120 different species of coffee plants, Coffea arabica (Arabica coffee) and Coffea canephora (Robusta coffee) are the two leading commercial varieties.

A variety of methods for preparing coffee have emerged, most of which use high-temperature water and short extraction times. But in recent years, cold brewing has gained in popularity.

Cold brews can be prepared either by indirect contact – by dripping over the coffee grinds – or directly, by immersion, where the coffee is steeped in the water for many hours. The diversity in cold brewing conditions can lead to variation in the sensory, physical and chemical characteristics among drinks prepared using the same material.

But while there has been extensive research into hot extraction methods, studies looking into cold brewing are relatively scarce.


Applying science to cold brewing

In a new study, published in Food Research International, the team extended their evaluation to include sensory profiles of cold brews prepared with different coffee species under different brewing conditions.1

The researchers brewed different beverages with Arabica and Robusta coffee beans - using either a coarser grind and extraction at 5oC or a finer grind and extraction at 15oC. They used a variety of analytical techniques, including ultra-performance liquid chromatography (UPLC), to examine the physicochemical properties of the four brews.

In general, regardless of brewing conditions, the Arabica beverages had a higher trigonelline content and acidity - while Robusta drinks had higher caffeine, chlorogenic acids (CGA) and melanoidin content. Coffee beverages made with finer grinds at 15oC had higher levels of total soluble solids, caffeine, CGA, melanoidins and acidity than those prepared with coarser grinds and extracted at 5oC.

For these experiments, the team diluted coffee samples using ultrapure water generated from an ELGA PURELAB® laboratory water purification system – minimising the risk of adding contaminants that may affect the results.


Sensory assessment

The researchers then asked a panel of experienced tasters to evaluate various sensory attributes of the four cold brews. The results indicated that coffee flavour and bitter taste were the dominant sensory attributes of all beverages, regardless of material and preparation.

The use of different coffee species had a greater impact on the perception of the sensory attributes of the cold brews than the particle size and water temperature. Bitterness and astringent sensation were more dominant in Robusta cold brews while coffee flavour and sour taste were highly dominant in Arabica cold brews. Despite this, there was no difference in preference for the four beverages.

These results offer new insight for future investigations into cold brew coffee, which continues to rapidly grow in popularity within the coffee industry.


Why choose ELGA LabWater

ELGA’s expert engineers, chemists and scientists are at the forefront of technological innovation. We continue to introduce game-changing features to the laboratory water market.

 

Reference:

  1. Portela, C. et al. Effects of brewing conditions and coffee species on the physicochemical characteristics, preferences and dynamics of sensory attributes perception in cold brews. Food Res. Int. 2021;151:110860
  • 留言咨询
  • 获取报价
  • 预订演示
  • 联系获认证的合作伙伴

留言咨询

在 ELGA LABWATER,我们希望能够为您提供有关我们实验室水纯化产品的精彩优惠和新闻动态。 我们将使用您提供的信息来预测您可能会感兴趣的内容。 我们会慎重处理您的数据,您可在此查阅我们的隐私政策。

ELGA LABWATER 的所有合作伙伴均已通过我们的审慎审核和认证。 为了对您的问题或查询进行回复,我们可能将您的联系详情转发给获认证的合作伙伴,由他们直接与您联系。 您可在此查看我们的获认证业务合作伙伴名单。

如果您希望接收来自 ELGA 及我们获认证合作伙伴的最新动态,请勾选下框: 在此.

是,我希望 ELGA LabWater 及其获认证合作伙伴基于我的联系详情为我发送其最新动态

获取报价

At ELGA LabWater, we have exciting offers and news about our products and services that we hope you’d like to hear about. We will use your information to predict what you might be interested in. We will treat your data with respect and you can find the details in our Privacy Policy.

ELGA LabWater works with a network of Approved Partners. In order to answer your questions or enquiries, we may pass your contact details to an Approved Partner, who may contact you directly. 

I'd like to receive updates from ELGA LabWater & ELGA Approved Partners based on my details.

预订演示

At ELGA LabWater, we have exciting offers and news about our products and services that we hope you’d like to hear about. We will use your information to predict what you might be interested in. We will treat your data with respect and you can find the details in our Privacy Policy.

ELGA LabWater works with a network of Approved Partners. In order to answer your questions or enquiries, we may pass your contact details to an Approved Partner, who may contact you directly. 

I'd like to receive updates from ELGA LabWater & ELGA Approved Partners based on my details.

Call us

Can't find what you are looking for?

Support Number
+44 (0)20 3567 7300
United Kingdom Sales
+44 (0)1628 879 704
United States of America Sales
+1 877-315-3542
France Sales
+33 1 40 83 65 00
China Sales
+86 400-616-8882

 

Elga LabWater 总部

ELGA Labwater英国总部

VWS(UK)Ltd.

Lane End Business Park,Lane End,High Wycombe

HP14 3BY,United Kingdom

ELGA Labwater中国总部

威立雅水处理技术(上海)有限公司

地址 : 上海市浦东新区张东路1761号5号楼
电话 : 021 - 38172288
传真 : 021 - 38172289
邮编 : 201210

案例研究

  • 雅培诊断
  • DASA 医学诊断
  • NeoDIN 医学研究所
  • 北斯塔福德郡 NHS 信托大学医院
  • Olsberg 职业技术学院

学习资源

  • 了解超纯水
  • 白皮书
  • 水纯化技术
  • 实验室应用
  • 水中杂质
  • Latest Blog
  • Water Purity - Different Types of Pure Water
  • What is Clinical Laboratory Reagent Water (CLSI)?
  • What is Total Organic Carbon (TOC)?

© VWS (UK) Ltd. 以 ELGA®LabWater 的名义经营业务。2024- 保留所有权利
ELGA 是 Veolia 旗下全球实验室用水品牌。

  • 隐私政策
  • 条款和条件
  • 全球法律合规
  • 专利
  • Trademarks
  • 页面操作员
  • 语言
    • Deutsch
    • English
    • Español
    • Français
    • Italiano
    • Português
    • 日本語
    • 中文
  • Veolia 其他站点
    • Veolia
    • Veolia Foundation
    • Veolia Water Technologies
Elga Veolia
TOP

© 2017 ELGA Veolia