SOURCE

const trans=(str)=>{
    const keys=["Item","Unit","Index","Standard"]
    const object={}
    const arr = str.split('	')
    keys.forEach((res,index)=>{
        object[res]=arr[index]
    })
    return JSON.parse(JSON.stringify(object) )
}
console.log(trans("Al2O3(%)	≥40	≥42	≥50	≥67	≥70"))