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Beckman Model M pH Meter, 1937 [1] Beckman model 72 pH meter, 1960 781 pH/Ion Meter pH meter by Metrohm. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2]
[21]: 119–124 For example, stabilizing agents such as antioxidants or antimicrobial agents may be added to prevent degradation, liquids containing certified concentrations of trace metals may have pH adjusted to keep metals in solution, and clinical reference materials may be freeze-dried for long term storage if they can be reconstituted ...
Consumer Reports is a United States-based non-profit organization which conducts product testing and product research to collect information to share with consumers so that they can make more informed purchase decisions in any marketplace.
Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy.
A 2004 Journal of the Medical Library Association review noted that "approximately half of the [laboratory test results] reports indicate the date the review was posted". [17] For a fee, ConsumerLab.com offers a voluntary certification program. Products that pass the certification can use the "CL Seal of Approval" for which there is a licensing ...
Old logo (1972-2018) The United States Consumer Product Safety Commission (USCPSC, CPSC, or commission) is an independent agency of the United States government.The CPSC seeks to promote the safety of consumer products by addressing "unreasonable risks" of injury (through coordinating recalls, evaluating products that are the subject of consumer complaints or industry reports, etc ...
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