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Howard Cell | 霍華德細胞計數池
產品介紹
INTRODUCTION >> Counting ChambersThe Howard cell is a glass slide 76mm x 35mm with a central circular island and is used for counting mold fibers and spores in fruit juices, especially from tomatoes. With the K20 coverglass in place, a 0.1mm thickness of liquid is contained over the central island. The coverglass has 25 calibrated fields of 1.382mm diameter through which to view the particles.
This coverglass removes the necessity of precise adjustment of the microscope and eyepiece graticule in the original Howard method.
Howard Cell（霍華德細胞計數池）是一種專門設計用來在顯微鏡下計數果汁或食品樣本中黴菌孢子與纖維的工具，廣泛應用於食品品質控制與微生物檢測領域。
主要用途
- 果汁與蔬果製品檢測：用於計算果汁、蔬菜汁或濃縮液中的黴菌孢子與植物纖維含量，以評估產品衛生品質。
- 黴菌孢子計數：可快速檢測樣本中是否含有過量黴菌孢子，協助判斷是否符合食品安全標準。
- 纖維含量分析：用於觀察果汁中是否含有過量植物纖維或雜質，影響口感與品質。
- 食品工廠品質控管：在生產線上進行快速抽樣檢測，確保產品符合衛生與品質規範。
結構與使用方式
- 計數池設計：Howard Cell 通常由玻璃製成，搭配專用蓋玻片（如 K20 型），形成固定深度的觀察腔室。
- 樣本準備：將果汁樣本均勻混合後，滴入計數池中，蓋上蓋玻片，靜置使孢子沉降。
- 顯微鏡觀察：使用顯微鏡觀察特定區域，計算黴菌孢子數量，並依據標準換算每毫升樣本中的孢子濃度。
標準與規範應用
Howard Cell 的使用常見於以下標準：
- AOAC（Association of Official Analytical Chemists）方法
- FDA 食品檢測指引
- 各國食品衛生法規中對果汁黴菌孢子含量的限值規定
產品總覽
Products >> Counting Chambers
S60 Howard Cell
Howard Cell for Fruit Juices, Mould Fibres and Spores Counting (To be Purchased together with K20 Cover).
S60 Howard Cell and associated K20 Cover Glass, is used world wide for mould counting in food quality control applications, such as tomato products and other fruit based preparations, based on the method originally developed by B.J. Howard in 1911.
Note: The complete system requires both the cell itself and cover glass. The cell does not come with a coverglass and one must be ordered separately. With the K20 cover glass in place a 0.1mm thickness of liquid is contained over the central island.
K20 Coverglass for Howard Cell
Coverglass for Howard Cell
To be Purchased with the S60 Howard Cell. The cover glass has 25 calibrated fields of 1.382mm diameter through which to view the particles. This cover glass removes the necessity of precise adjustment of the microscope magnification and calibration of a special eyepiece reticle in the original Howard Method, making it suitable for use with a modern zoom stereo microscope as well as a conventional compound microscope.
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